explain xkcd - User contributions [en]

2653: Omnitaur

2022-08-03T01:43:06Z

162.158.166.183: /* Phenotypical chimeras in folklore */ paragraph break

{{comic
| number = 2653
| date = August 1, 2022
| title = Omnitaur
| image = omnitaur.png
| titletext = "My parents were both omnitaurs, which is how I got interested in recombination," said the normal human.
}}

==Explanation==
{{incomplete|Created by A CAPRIHIPPOLEOPISCITAUR TRAPPED IN A ZYGOTE'S BODY. Do NOT delete this tag too soon.}}

Omnitaur is an {{w|anagram}} of {{w|minotaur}}, a mythical creature that was part man, part bull. "{{wiktionary|omni}}" is a prefix that means "all" that is, for instance, known from the word {{w|omnivore}}, meaning 'all eating' as compared to {{w|carnivore}} or {{w|herbivore}} — only eating meat or plant respectively. Given the combination of animals used to create the omnitaur, it could be expected that it was also an omnivore. "taur" usually means "bull", but besides "minotaur" it also appears in "{{w|centaur}}", another mythical creature which has the upper body of a human and the lower body and legs of a horse. Thus Randall is taking "taur" to mean any creature made up of parts of different animals.

An "omnitaur" would suggest that it would encompass all real and mythical creatures, or perhaps some random assortment of such. In this instance, it appears to be a hybrid, or {{w|Chimera (genetics)|genetic chimera}}, combined from eleven different creatures: {{w|fish}}, {{w|lion}}, {{w|snake}}, {{w|shark}}, {{w|bull}}, {{w|dragon}} (a mythical and often chimeric creature in its own right), {{w|horse}}, {{w|leopard}}, {{w|Sheep|ram}} (male sheep), {{w|human}} and {{w|bird}}. Chimerism is not as uncommon at the genetic level, for example humans have about 145 genes (out of around 30,000) originating from bacteria, other single-celled organisms, and viruses.[https://www.science.org/content/article/humans-may-harbor-more-100-genes-other-organisms] {{w|Mitochondria}}, the powerhouse of the cell, were originally chimeric bacteria {{w|symbiosis|symbionts}}. But chimeras of larger organisms are rare, usually involving fraternal twins whose {{w|zygote}}s or {{w|embryo}}s combined, as in {{w|conjoined twins}} but resulting in less distinct {{w|phenotype|phenotypical}} expression. Artificial human chimeras with viruses, mice, pigs, and monkeys have been the subject of ethics controversies in recent years.[https://www.theguardian.com/technology/2019/aug/11/the-five-chimeras-human-monkey-hybrid-genetic][https://jme.bmj.com/content/45/7/440.abstract]

The title text is a comment by a human whose parents were both omnitaurs. It would be funny that such parents would not produce offspring that was still omnitaur. It suggests that this may be the result of {{w|genetic recombination}}, which is the exchange of genetic material between different organisms leading to production of offspring with combinations of traits that differ from those found in either parent. In this case, seemingly, they inherited ''only'' the human elements of each parent, yet sufficient to develop into a whole human with no missing or chimeric elements.

Both omnitaur parents likely had human germlines and compatible reproductive organs. Since the example depicted seems to be only 1/11 human, the odds of two parents as mentioned in the title text having fully human offspring would simplistically appear to be (1/11)11, or one chance in 285 billion. In reality, each physical part could not be the result of an equal recombinant genetic contribution, because the eleven animal chromosomes vary widely in number and size. Moreover, chimeras composed of multiple animals do not have chimeric children, because even with multiple sets of reproductive organs, the {{w|germline}}s are not combined. [https://journals.biologists.com/dev/article/148/12/dev195792/269139/The-road-to-generating-transplantable-organs-from Interspecies blastocyst complementation,] used to create human chimera organs and cell lines in other animals, is usually limited to combining two organisms into one whose offspring are not hybridized if they are even viable, and usually without human germlines or reproductive organs (or human central nervous systems, assuaging a major ethical concern.)

===Phenotypical chimeras in folklore===

In addition to the minotaur and centaur, many other potential inspirations can be found in mythology, like the {{w|manticore}}, with a body of a lion and human face; a {{w|griffin}}, with a lion's body and a eagle's head; a {{w|mermaid}}, with a lower body of a fish and upper body of a human; a {{w|Hippocampus (mythology)|hippocampus}}, with the upper body of a horse and a lower body of a fish; a {{w|qilin}}, with a body that resembles both a horse and a dragon; or the mythological {{w|chimera (mythology)|chimera}}, for which the genetic chimera is named, which has lion, snake, and goat body parts. Ultimately, there are {{w|List of hybrid creatures in folklore|lots of hybrid creatures in mythology}} with {{w|phenotype}}s combined from multiple animals. Usually, genetic hybridization produces much more smoothly blended phenotypes instead of dividing the body into large distinctly chimeric regions, although {{w|Mosaic (genetics)|mosaicism}} of fur, skin or {{w|Heterochromia iridum|eyes}} can produce notable differences of hue or shade.

In {{w|C. S. Lewis}}' {{w|The Chronicles of Narnia}}, the {{w|Magical_creatures_in_The_Chronicles_of_Narnia#Centaurs|centaurs}} are described as eating two meals — a huge roast meal "to satisfy the man stomach," and a meal of grass, "to satisfy the horse stomach," making it take quite some time for them to eat every morning. Since the omnitaur also has herbivore and omnivore (as well as carnivore) parts, this could further support the supposition that it is an omnivore, and it may similarly need multiple stomachs for these multiple appetites. It is unclear how compatible the various diets of its components would be (not least because 'fish,' 'snake' and 'bird' are quite unspecific, and it's hard to know what a dragon would eat) but it would likely need several meals, taking even longer to eat than the Centaur (plus the bird beak may slow the process down quite a bit.) In any case, a chimera of both warm and cold-blooded organisms seems unlikely to be viable, even at the organ level, let alone with combined surface phenotypes.

The Chimera monster in {{w|Dungeons and Dragons}} is a "vile combination of goat, lion, and dragon, and features the heads of all three."[https://www.dndbeyond.com/monsters/16823-chimera] (with similar depictions being common across fantasy media.) The Aztec god {{w|Quetzalcoatl}} ("the feathered serpent") inspired the {{w|Discworld}} god/demon Quezovercoatl ("the {{w|Boa (clothing accessory)|feathered boa}}") ...being an analogue and mish-mash of various South American cultural and wildlife totems and described more fully as "as half-man, half-chicken, half-jaguar, half-serpent, half-scorpion and half-mad (a total of three homicidal maniacs)" with the small disadvantage of manifesting as only six inches high and being stepped on.

While chimeras occur in fantasy fiction, they also occur in science fiction, for example as {{w|cyborg}}s. The famous ''{{w|The Restaurant at the End of the Universe}}'' sequel to Douglas Adams' ''The Hitchhiker's Guide to the Galaxy'', had a cow with the mind and vocal tract of a human so it could articulate how much it wanted to be eaten.

==Transcript==
:[A creature, the Omnitaur, is shown. It is a four legged animal divided into 11 segments, each segment is from a different animal. An arrow goes to each section from a label, most of the labels are above the animal, but the fourth and seventh segments labels are below the animal. The animal has a fish tail and cat like hind legs. The torso is divided into four segments, the first and last of these with scales, but only the last of these also with sharp scales at the top. The second torso segment is white and smooth, the third also white but with hair both above and below, those above merges with the sharp scales of the fourth torso segment. The front legs are horse like, the lower neck is from an animal with dark spots, the upper neck has rams horns, which goes over in the central part of a human head, with ears and hair (drawn like a real human, not like a xkcd stick figure) and finally the front of the face is a bird with its eyes and a beak shown. The labels are given here in the order of the segment of the animal from the back to the front (disregarding weather the label is written above or below the animal:]
:Fish
:Lion
:Snake
:Shark
:Bull
:Dragon
:Horse
:Leopard
:Ram
:Human
:Bird

:[Caption below the panel:]
:The Omnitaur

{{comic discussion}}

[[Category:Animals]]
[[Category:Biology]]

2648: Chemicals

2022-07-21T19:09:08Z

162.158.166.183:

{{comic
| number = 2648
| date = July 20, 2022
| title = Chemicals
| image = chemicals.png
| titletext = It's hard to believe, but lots of kids these days ONLY know how to buy prepackaged molecules.
}}

==Explanation==
{{incomplete|Created by BIG ISOMER - Please change this comment when editing this page. Do NOT delete this tag too soon.}}

In this comic, [[Megan]] mentions that her company spends a lot on chemicals for which you can find formulas online. She suggests assembling chemicals from atoms "bought in bulk," holding a sheet of paper with the {{w|empirical formula}} C6H5NO2 which designates [https://pubchem.ncbi.nlm.nih.gov/#query=C6H5NO2 more than a hundred compounds and ions] including {{w|nitrobenzene}}, {{w|niacin}}, {{w|isonicotinic acid}}, and {{w|picolinic acid}}, followed by their component elements listed with prices. The ambiguity of chemical formulae is one of the jokes in the comic.

It is true that many expensive chemicals are composed entirely of inexpensive and commonly available elements, but "assembling" those elements into specific molecules, especially considering the complexity and specificity often required, is rarely a simple task. This set of tasks is the primary purpose of the entire global chemical industry. While in-house {{w|chemical synthesis}} is sometimes cost-effective, usually it is not, because end users are often unable to leverage the {{w|economies of scale}} inherent in bulk manufacturing by specialist industrial firms.[https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2880393/] However, we don't know whether Megan and [[Cueball]] work in a laboratory, factory, or some other industrial setting. If they need the chemicals in question in bulk, then synthesizing them might be cost-effective, though it remains a complex and exacting process.

In any case, producing chemicals from their constituent elements or {{w|Precursor (chemistry)|precursor compound}}s is difficult and time-consuming, requires expensive equipment, and is often fraught with peril.[https://www.youtube.com/watch?v=5QwW2owNWgc] {{w|Nitrobenzene}}, one of the C6H5NO2 compounds, is an excellent example because it is explosive and extremely toxic, and its synthesis is highly exothermic, making it one of the most dangerous syntheses in the chemical industry.[https://www.icheme.org/media/10339/xiii-paper-36.pdf] Such issues answer Cueball's question as to why more places don't manufacture their own chemicals. He and Megan appear to be envisioning 'assembling' chemicals as a much simpler process, perhaps akin to snapping together Legos or pieces of a model kit, where there is no reactivity, no energy release, and no hazardous intermediate chemicals. The characters' naivety also gives rise to the humor of the comic, which may also be mocking DIY lifehacks where the cost savings only make sense if their massive time investment is ignored. "Big Molecule" is an [[2130: Industry Nicknames|industry nickname like Big Oil or Big Pharma]], and amusing in its own right.

The title text refers to the fact that many people believe that "kids these days" don't do enough work or are spoiled. Randall has expressed that he dislikes statements like these in [[2165: Millennials|previous comics]].

This comic may have been prompted by recent news that [https://english.elpais.com/science-tech/2022-07-15/for-the-first-time-in-history-we-can-modify-atomic-bonds-in-a-single-molecule.html scientists have found a way to assemble and change atoms in individual molecules] by modifying their bonds.

==Transcript==
:[Megan and Cueball standing next to each other. Megan has her palms raised.]
:Megan: You know how our company spends a lot on expensive chemicals?
:Cueball: Yeah?

:[Zoom in on Megan who is holding piece of paper up in one hand. The paper has a large chemical formula at the top. Below is a list of the atoms needed, with amount and a price tag in dollars but with unreadable amount. There is a sum total at the bottom beneath a line.]
:Megan: Well, I just learned you can look up all of the formulas online!
:Megan: We can just buy the atoms in bulk and assemble them here!
:Paper:
::<big>C6H5NO2</big>
::Carbon 6 $
::Hydrogen 5 $
::Nitrogen 1 $
::Oxygen 2 $
::Total 14 $

:[Cueball is now on the left of Megan as she is walking past him to the right holding her arms outstretched with her palms up.]
:Cueball: I wonder why more places don't do that.
:Megan: People have no idea they're getting ripped off by Big Molecule!

{{comic discussion}}

[[Category:Comics featuring Megan]]
[[Category:Comics featuring Cueball]]
[[Category:Chemistry]]

Talk:2642: Meta-Alternating Current

2022-07-16T19:40:56Z

162.158.166.183: https://www.physics-and-radio-electronics.com/electronic-devices-and-circuits/rectifier/bridgerectifier.html

And today, we are reminded that [[Randall]] used to be a physicist (or at least has a physics degree). Not worth mentioning in the article, but while inverters can't reverse each other, transformers can. (Has Randall done the transformer/Transformer pun yet as an excuse to mock the movies?) [[User:Nitpicking|Nitpicking]] ([[User talk:Nitpicking|talk]]) 11:10, 7 July 2022 (UTC)
: I haven't picked up the physics reference yet. I see electrical engineering here. Randall strikes me as somebody who would study physics given the opportunit, though. It's notable that this webcomic started while Randall was in college, if I recall right. [[Special:Contributions/172.70.230.75|172.70.230.75]] 11:58, 7 July 2022 (UTC)

Long distance links, especially those between separate unsynchronized grids, use high voltage DC. There is a 2,000-mile link in China running at 1 MV. [[User:Arachrah|Arachrah]] ([[User talk:Arachrah|talk]]) 11:32, 7 July 2022 (UTC)
:That's because at great distances, relatively high frequency AC loses a lot of ("active" = actually useful) power as ... reactive power, I think (didn't learn the terminology in English, unit seems right though). A typical grid has a lot of generators and load. A long distance connection results in a phase shift according to the transmission time (speed of light in medium x distance) in about the order of magnitude of the AC period (usually somewhere between 1/10 to 1/60 seconds) wastes a portion equal to the sine of the phase shift angle (up to 90° = all of it) as reactive power. DC isn't quite as easy to use but on long distances there is no power loss to reactive power. [[User:627235|627235]] ([[User talk:627235|talk]]) 12:25, 7 July 2022 (UTC)

Let's face it, the thing should be called an alternator. Of course that name's taken as a redundant word for (electrical) generator. [[User:627235|627235]] ([[User talk:627235|talk]]) 12:26, 7 July 2022 (UTC)
: Alternator and Generator shouldn't be used interchangeably. At least, in automotive, aerospace and industrial discussions, a generator is normally thought of as a DC device while an alternator is AC, even if we usually rectify it's output to 12 or 24VDC... [[User:SwervingLemon|SwervingLemon]] ([[User talk:SwervingLemon|talk]]) 19:33, 9 July 2022 (UTC)

It always bothered me that UPS battery backups take the wall AC and convert it to DC to charge the battery, but then have to turn it back to AC to send it to the computer, so the power supply can convert it to DC to run the thing. I picture some connector that goes directly from the UPS to the power supply so that if power is lost it can just pull 12V directly from the battery. [[User:Andyd273|Andyd273]] ([[User talk:Andyd273|talk]]) 12:47, 7 July 2022 (UTC)
:some UPSs do this. They normally power the computer directly from the input AC, but if there is a power failure, they use the battery to power the inverters and switch the output to the inverter. Other UPSs always power the computer from the inverter. They have the advantage that there is not even a milisecond time to start powering the computer. That can be better for some equipment, and that kind of UPS often costs more. It is also worth noting that in some data centers, they bypass the AC step and have one big DC power supply that directly powers the computers. [[User:WhiteDragon|WhiteDragon]] ([[User talk:WhiteDragon|talk]]) 16:49, 7 July 2022 (UTC)

[https://en.wikipedia.org/wiki/Inverter_(logic_gate) NOT logic gates] are also often known as inverters. An even number of those '''would''' indeed produce the same output as the (true/false) input. [[Special:Contributions/108.162.242.58|108.162.242.58]] 16:03, 7 July 2022 (UTC)

“Further chaining this into more inverters/rectifiers would normally not be considered.”
Well, if you take a DCC controlled model railway for camping, you get a second stage of inverter/rectifier.
The power supply of the DCC control station usually expects AC input, so you invert the DC of the car battery.
The PSU then makes DC for the control station processor, which is then made AC to generate a DCC signal.
The locomotives always have a rectifier to get a DC power supply from the DCC signal (which is confusingly AC).

You get a third stage with another plausible trick: put the battery on a car battery charger, which converts AC from the camping site power grid to DC. Then use a locomotive with a (rarely used) BLDC motor, which confusingly needs an inverter generating AC.
--[[Special:Contributions/172.71.94.181|172.71.94.181]] 18:01, 7 July 2022 (UTC)

The efficiency calculation is bogus. For the rectifier, the "efficiency" of 81% relates to voltage, not power. (See https://en.wikipedia.org/wiki/Rectifier). I don't know what the power efficiency is, but I do note that my computer's power supply is not glowing white hot.
:Where do you propose the extra current to make up for such difference would come from? [[Special:Contributions/172.70.206.213|172.70.206.213]] 21:38, 7 July 2022 (UTC)
::When you convert AC to DC or DC to AC, you can't qualify either with single number for voltage OR current. You need to examine whole graph, because both voltage and current are changing with frequency of (original) AC. I'm pretty sure that 81% figure is related to the different way how voltage is computed for AC and DC. That said, regarding the gloving power supply ... usually, power supply contains fan, and while it's partially used to cool the case interior, the power supply might not like it being stopped either. -- [[User:Hkmaly|Hkmaly]] ([[User talk:Hkmaly|talk]]) 22:24, 7 July 2022 (UTC)
:Your computer's power supply has switching H-bridge MOSFET transistors that sense and match the AC phase, not an ordinary diode rectifier. [[Special:Contributions/172.70.206.213|172.70.206.213]] 23:25, 7 July 2022 (UTC)
:: The mains input bridge rectifier in every PSU I've seen is just a normal 4 diode bridge, it's at worst a 2% loss. The output from the transformer probably has synchronous rectification due to the much lower voltage, but not an H-bridge, instead a center-tapped transformer winding and 2 MOSFETs. The only H-bridge in a PSU is the inverter. [[Special:Contributions/141.101.76.233|141.101.76.233]] 21:43, 8 July 2022 (UTC)
::: Please see https://www.physics-and-radio-electronics.com/electronic-devices-and-circuits/rectifier/bridgerectifier.html "The maximum rectifier efficiency of a bridge rectifier is 81.2% which is same as the center tapped full wave rectifier." See also https://techweb.rohm.com/knowledge/acdc/acdc_pwm/acdc_pwm06/8786 [[Special:Contributions/162.158.166.183|162.158.166.183]] 19:36, 16 July 2022 (UTC)

I interpreted Randall imagining "inversion" as "reciprocal" (or maybe the inversion of a function) rather than physically turning something upside-down, since mathematical inversion is typically reversible... [[Special:Contributions/172.70.130.121|172.70.130.121]] 03:48, 8 July 2022 (UTC)

Should the description also comment on the choice of number for this "connector". Obviously related to the fact that wall outlet voltage in the US is frequently (pun intended) 120 Volts. [[User:MAP|MAP]] ([[User talk:MAP|talk]]) 14:41, 8 July 2022 (UTC)

Two inverters *can* cancel each other out if they are the simplest type (a commutator, a.k.a. square wave inverter) *and* they happen to be synchronous. Expect glitches at the commutation points though! [[Special:Contributions/172.70.210.125|172.70.210.125]] 16:39, 8 July 2022 (UTC)
: Totally irrelevant to the comic. [[Special:Contributions/172.70.211.52|172.70.211.52]] 20:58, 8 July 2022 (UTC)
:: How is it irrelevant?
::: The comic is about "meta alternating" pairs of consumer inverters and rectifiers, not idealized chains of the same circuit. [[Special:Contributions/172.70.206.213|172.70.206.213]] 00:58, 9 July 2022 (UTC)
:::: The title text is about pairing two inverters and having them cancel each other out. It's relevant. [[User:SwervingLemon|SwervingLemon]] ([[User talk:SwervingLemon|talk]]) 19:33, 9 July 2022 (UTC)

Talk:2642: Meta-Alternating Current

2022-07-16T19:36:46Z

162.158.166.183: https://techweb.rohm.com/knowledge/acdc/acdc_pwm/acdc_pwm06/8786

And today, we are reminded that [[Randall]] used to be a physicist (or at least has a physics degree). Not worth mentioning in the article, but while inverters can't reverse each other, transformers can. (Has Randall done the transformer/Transformer pun yet as an excuse to mock the movies?) [[User:Nitpicking|Nitpicking]] ([[User talk:Nitpicking|talk]]) 11:10, 7 July 2022 (UTC)
: I haven't picked up the physics reference yet. I see electrical engineering here. Randall strikes me as somebody who would study physics given the opportunit, though. It's notable that this webcomic started while Randall was in college, if I recall right. [[Special:Contributions/172.70.230.75|172.70.230.75]] 11:58, 7 July 2022 (UTC)

Long distance links, especially those between separate unsynchronized grids, use high voltage DC. There is a 2,000-mile link in China running at 1 MV. [[User:Arachrah|Arachrah]] ([[User talk:Arachrah|talk]]) 11:32, 7 July 2022 (UTC)
:That's because at great distances, relatively high frequency AC loses a lot of ("active" = actually useful) power as ... reactive power, I think (didn't learn the terminology in English, unit seems right though). A typical grid has a lot of generators and load. A long distance connection results in a phase shift according to the transmission time (speed of light in medium x distance) in about the order of magnitude of the AC period (usually somewhere between 1/10 to 1/60 seconds) wastes a portion equal to the sine of the phase shift angle (up to 90° = all of it) as reactive power. DC isn't quite as easy to use but on long distances there is no power loss to reactive power. [[User:627235|627235]] ([[User talk:627235|talk]]) 12:25, 7 July 2022 (UTC)

Let's face it, the thing should be called an alternator. Of course that name's taken as a redundant word for (electrical) generator. [[User:627235|627235]] ([[User talk:627235|talk]]) 12:26, 7 July 2022 (UTC)
: Alternator and Generator shouldn't be used interchangeably. At least, in automotive, aerospace and industrial discussions, a generator is normally thought of as a DC device while an alternator is AC, even if we usually rectify it's output to 12 or 24VDC... [[User:SwervingLemon|SwervingLemon]] ([[User talk:SwervingLemon|talk]]) 19:33, 9 July 2022 (UTC)

It always bothered me that UPS battery backups take the wall AC and convert it to DC to charge the battery, but then have to turn it back to AC to send it to the computer, so the power supply can convert it to DC to run the thing. I picture some connector that goes directly from the UPS to the power supply so that if power is lost it can just pull 12V directly from the battery. [[User:Andyd273|Andyd273]] ([[User talk:Andyd273|talk]]) 12:47, 7 July 2022 (UTC)
:some UPSs do this. They normally power the computer directly from the input AC, but if there is a power failure, they use the battery to power the inverters and switch the output to the inverter. Other UPSs always power the computer from the inverter. They have the advantage that there is not even a milisecond time to start powering the computer. That can be better for some equipment, and that kind of UPS often costs more. It is also worth noting that in some data centers, they bypass the AC step and have one big DC power supply that directly powers the computers. [[User:WhiteDragon|WhiteDragon]] ([[User talk:WhiteDragon|talk]]) 16:49, 7 July 2022 (UTC)

[https://en.wikipedia.org/wiki/Inverter_(logic_gate) NOT logic gates] are also often known as inverters. An even number of those '''would''' indeed produce the same output as the (true/false) input. [[Special:Contributions/108.162.242.58|108.162.242.58]] 16:03, 7 July 2022 (UTC)

“Further chaining this into more inverters/rectifiers would normally not be considered.”
Well, if you take a DCC controlled model railway for camping, you get a second stage of inverter/rectifier.
The power supply of the DCC control station usually expects AC input, so you invert the DC of the car battery.
The PSU then makes DC for the control station processor, which is then made AC to generate a DCC signal.
The locomotives always have a rectifier to get a DC power supply from the DCC signal (which is confusingly AC).

You get a third stage with another plausible trick: put the battery on a car battery charger, which converts AC from the camping site power grid to DC. Then use a locomotive with a (rarely used) BLDC motor, which confusingly needs an inverter generating AC.
--[[Special:Contributions/172.71.94.181|172.71.94.181]] 18:01, 7 July 2022 (UTC)

The efficiency calculation is bogus. For the rectifier, the "efficiency" of 81% relates to voltage, not power. (See https://en.wikipedia.org/wiki/Rectifier). I don't know what the power efficiency is, but I do note that my computer's power supply is not glowing white hot.
:Where do you propose the extra current to make up for such difference would come from? [[Special:Contributions/172.70.206.213|172.70.206.213]] 21:38, 7 July 2022 (UTC)
::When you convert AC to DC or DC to AC, you can't qualify either with single number for voltage OR current. You need to examine whole graph, because both voltage and current are changing with frequency of (original) AC. I'm pretty sure that 81% figure is related to the different way how voltage is computed for AC and DC. That said, regarding the gloving power supply ... usually, power supply contains fan, and while it's partially used to cool the case interior, the power supply might not like it being stopped either. -- [[User:Hkmaly|Hkmaly]] ([[User talk:Hkmaly|talk]]) 22:24, 7 July 2022 (UTC)
:Your computer's power supply has switching H-bridge MOSFET transistors that sense and match the AC phase, not an ordinary diode rectifier. [[Special:Contributions/172.70.206.213|172.70.206.213]] 23:25, 7 July 2022 (UTC)
:: The mains input bridge rectifier in every PSU I've seen is just a normal 4 diode bridge, it's at worst a 2% loss. The output from the transformer probably has synchronous rectification due to the much lower voltage, but not an H-bridge, instead a center-tapped transformer winding and 2 MOSFETs. The only H-bridge in a PSU is the inverter. [[Special:Contributions/141.101.76.233|141.101.76.233]] 21:43, 8 July 2022 (UTC)
::: Please see https://techweb.rohm.com/knowledge/acdc/acdc_pwm/acdc_pwm06/8786 [[Special:Contributions/162.158.166.183|162.158.166.183]] 19:36, 16 July 2022 (UTC)

I interpreted Randall imagining "inversion" as "reciprocal" (or maybe the inversion of a function) rather than physically turning something upside-down, since mathematical inversion is typically reversible... [[Special:Contributions/172.70.130.121|172.70.130.121]] 03:48, 8 July 2022 (UTC)

Should the description also comment on the choice of number for this "connector". Obviously related to the fact that wall outlet voltage in the US is frequently (pun intended) 120 Volts. [[User:MAP|MAP]] ([[User talk:MAP|talk]]) 14:41, 8 July 2022 (UTC)

Two inverters *can* cancel each other out if they are the simplest type (a commutator, a.k.a. square wave inverter) *and* they happen to be synchronous. Expect glitches at the commutation points though! [[Special:Contributions/172.70.210.125|172.70.210.125]] 16:39, 8 July 2022 (UTC)
: Totally irrelevant to the comic. [[Special:Contributions/172.70.211.52|172.70.211.52]] 20:58, 8 July 2022 (UTC)
:: How is it irrelevant?
::: The comic is about "meta alternating" pairs of consumer inverters and rectifiers, not idealized chains of the same circuit. [[Special:Contributions/172.70.206.213|172.70.206.213]] 00:58, 9 July 2022 (UTC)
:::: The title text is about pairing two inverters and having them cancel each other out. It's relevant. [[User:SwervingLemon|SwervingLemon]] ([[User talk:SwervingLemon|talk]]) 19:33, 9 July 2022 (UTC)

2642: Meta-Alternating Current

2022-07-16T19:35:24Z

162.158.166.183: Revert, see: https://techweb.rohm.com/knowledge/acdc/acdc_pwm/acdc_pwm06/8786

{{comic
| number = 2642
| date = July 6, 2022
| title = Meta-Alternating Current
| image = meta_alternating_current.png
| titletext = It's always bothered me that you can't cancel out an inverter by putting a second inverter after it.
}}

==Explanation==
{{incomplete|Created by a CHAIN OF INVERTERS - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
{{w|Direct current}} is a unidirectional flow of electrons from a power source to something being powered, through one or more conductors, before returning to the power source via one or more other conductors, thus completing the circuit. Batteries produce direct current. It is commonly used in electronics applications, including computers. {{w|Alternating current}}, on the other hand, frequently reverses the direction of electron flow, and is commonly used for longer-distance transmission (such as from the power plant to an outlet).

This comic proposes a humorous ''Meta-Alternating Current'', which uses a series of adapters to "alternate" between DC and AC current along the length of a connector. This is absurd in part because typical {{w|power inverter}} efficiency is 90%, and maximum {{w|bridge rectifier}} efficiency is 81.2%, so an {{w|extension cord}} made of in this manner would lose about 27% power per such pair. The "extension cord" shown would yield about 11% of its input power.

The title text bemoans that an inverter, which converts direct current to alternating current, does not work in the other direction, as a layman's interpretation of the word "inverter" might appear. Rather, a separate device, a {{w|rectifier}}, also pictured in the comic, must be used for this second conversion. (However, a similar circuit to an inverter may be used to rectify in a process called {{w|active rectification}}.)

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

:Cursed Connectors #120

:[Drawing of a chain of rectifiers and inverters. There are seven pairs of rectifier/inverter. The chain starts on the left by a mains plug (type B), followed by the first rectifier. It ends with the last inverter, and a female mains plug (type B socket).]

:Meta-alternating current extension cord
:(alternates between AC and DC)

==Trivia==
This comic replaced [[No One Was Hurt]] as comic 2642 after it was taken down from [[xkcd]]'s website.

This comic does not have a high-resolution (2x) image for high-DPI displays, making it look more blurry than usual on such devices (such as smartphones). This is probably because it was uploaded hastily to replace No One Was Hurt quickly.

{{comic discussion}}
[[Category:Cursed Connectors]]

2646: Minkowski Space

2022-07-16T19:13:26Z

162.158.166.183: /* Explanation */ copyedit

{{comic
| number = 2646
| date = July 15, 2022
| title = Minkowski Space
| image = minkowski_space.png
| titletext = My liege, we were able to follow the ship into Minkowski space, but now they've jumped to Hilbert space and they could honestly be anywhere.
}}

==Explanation==
{{incomplete|Created by A RELATIVISTIC QUANTUM STATE - Please change this comment when editing this page. Do NOT delete this tag too soon.}}

In science fiction, {{w|faster than light travel}}, an impossibility with our current understanding of physics, is often explained by having ships enter into some form of different realm, frequently termed "hyperspace," where presumably the laws of physics are different so as to allow such superluminal travel to occur. Such a transition is called "jumping."

In this comic, a spaceship is being chased by an enemy ship. The crew attempt to escape by jumping as if into hyperspace, to escape their pursuer as quickly as possible. However, they enter {{w|Minkowski space}} instead. Minkowski space combines conventional 3-D space together with time into a mathematical object called a {{w|manifold}}, which is useful for analysis of {{w|special relativity}}. Since it is identical to normal reality, shifting to Minkowski space is meaningless and offers no benefit for escaping pursuit, providing the humor of the comic's absurdist joke.

The visual depiction of the spaceships skewed diagonally is based on the graphical {{w|Minkowski diagram}} representation of objects in Minkowski space, where the {{w|world line}} of matter is bounded inside its diagonal {{w|light cone}}.

The mention of distance depending on the observer's frame of reference refers to distances changing when measured in different {{w|inertial frame of reference|inertial frames of reference}}, a concept called the {{w|relativity of simultaneity}}. Here are [https://www.youtube.com/watch?v=asW78vToNLQ some videos] intended [https://www.youtube.com/watch?v=Xrqj88zQZJg to explain] that concept. The skewing depicted changes the distance between the spaceships in such a way that the tip of the pursuer comes closer to the pursued spaceship, but their centers move further apart. So the question of whether they have come closer is indeterminate for the reader of the comic.

The title text is a status report from someone in the pursuing spaceship to their leader (whom they call "my {{w|Homage (feudal)|liege}}.") They tell their superior that following the spaceship to Minkowski space was not a problem, but now they cannot find them after they jumped to Hilbert space, as they could now be anywhere. As in the [[2577:_Sea_Chase|Sea Chase]] comic, there was also more than one type of space to jump to here.

Whereas trying to hide in Minkowski space failed, it turned out that hiding in {{w|Hilbert space}} is much easier. This is because Hilbert spaces can have an infinite number of dimensions, and thus are much more complicated than four-dimensional Minkowski space. However, Hilbert space is used to describe mathematical objects such as functions of various parameters and complexity, not physical spatiotemporal reality, so it is very unusual for a physical object to be represented in Hilbert space. The reference to Hilbert space could also relate to the {{w|uncertainty principle}}, as quantum states can be represented as vectors in a Hilbert space.

==Transcript==
:[A spaceship is being pursued by another spaceship. Both ships have a black part in the front representing a window. They are the same size but different designs. The pursued spaceship to the right has two engines below and a big engine behind. The pursuing spaceship to the left has a V-shaped rear end, and what seems like two weapons on either side pointing forward. At least two persons inside the pursued spaceship are talking to each other, and their text comes out from two starburst on top and bottom of the spaceship.]
:Voice 1: The enemy ship is right behind us!
:Voice 2: Prepare to jump to Minkowski space on my mark.

:[Same setting, with star burst above only. The sound coming from the pursued spaceship is written inside a burst of small lines below the spaceship. Voice 2, by context, is the same as in panel 1.]
:Voice 2: Three... two... one... ''mark!''
:Click

:[Both spaceship are tilted upwards and becomes distorted so they become longer and thinner.]

:[The tilting increases and the distortion is now so pronounced that the spaceships are almost unrecognizable, almost just lines with structure. The distance between the tip of the pursuing spaceship and the pursued becomes shorter in the last two panels, but the distance between their center parts becomes larger. Up to three distinct voices are shown, here, which may include those seen in Panel 1 but with no clear relation.]
:Voice 3: Are they still getting closer?
:Voice 4: I can't tell.
:Voice 5: I think it depends on your frame of reference.

{{comic discussion}}

[[Category:Space]]
[[Category:Math]]
[[Category:Physics]]

2646: Minkowski Space

2022-07-16T19:11:41Z

162.158.166.183: /* Explanation */ copyedit

{{comic
| number = 2646
| date = July 15, 2022
| title = Minkowski Space
| image = minkowski_space.png
| titletext = My liege, we were able to follow the ship into Minkowski space, but now they've jumped to Hilbert space and they could honestly be anywhere.
}}

==Explanation==
{{incomplete|Created by A RELATIVISTIC QUANTUM STATE - Please change this comment when editing this page. Do NOT delete this tag too soon.}}

In science fiction, {{w|faster than light travel}}, an impossibility with our current understanding of physics, is often explained by having ships enter into some form of different realm, frequently termed "hyperspace," where presumably the laws of physics are different so as to allow such superluminal travel to occur. Such a transition is called "jumping."

In this comic, a spaceship is being chased by an enemy ship. The crew attempt to escape by jumping as if into hyperspace, to escape their pursuer as quickly as possible. However, they enter {{w|Minkowski space}} instead. Minkowski space combines conventional 3-D space and together with time into a mathematical object called a {{w|manifold}}, which is useful for analysis of {{w|special relativity}}. Since it is identical to normal reality, shifting to Minkowski space is meaningless and offers no benefit for escaping pursuit, providing the humor of the comic's absurdist joke.

The visual depiction of the spaceships skewed diagonally is based on the graphical {{w|Minkowski diagram}} representation of objects in Minkowski space, where the {{w|world line}} of matter is bounded inside its diagonal {{w|light cone}}.

The mention of distance depending on the observer's frame of reference refers to distances changing when measured in different {{w|inertial frame of reference|inertial frames of reference}}, a concept called the {{w|relativity of simultaneity}}. Here are [https://www.youtube.com/watch?v=asW78vToNLQ some videos] intended [https://www.youtube.com/watch?v=Xrqj88zQZJg to explain] that concept. The skewing depicted changes the distance between the spaceships in such a way that the tip of the pursuer comes closer to the pursued spaceship, but their centers move further apart. So the question of whether they have come closer is indeterminate for the reader of the comic.

The title text is a status report from someone in the pursuing spaceship to their leader (whom they call "my {{w|Homage (feudal)|liege}}.") They tell their superior that following the spaceship to Minkowski space was not a problem, but now they cannot find them after they jumped to Hilbert space, as they could now be anywhere. As in the [[2577:_Sea_Chase|Sea Chase]] comic, there was also more than one type of space to jump to here.

Whereas trying to hide in Minkowski space failed, it turned out that hiding in {{w|Hilbert space}} is much easier. This is because Hilbert spaces can have an infinite number of dimensions, and thus are much more complicated than four-dimensional Minkowski space. However, Hilbert space is used to describe mathematical objects such as functions of various parameters and complexity, not physical spatiotemporal reality, so it is very unusual for a physical object to be represented in Hilbert space. The reference to Hilbert space could also relate to the {{w|uncertainty principle}}, as quantum states can be represented as vectors in a Hilbert space.

==Transcript==
:[A spaceship is being pursued by another spaceship. Both ships have a black part in the front representing a window. They are the same size but different designs. The pursued spaceship to the right has two engines below and a big engine behind. The pursuing spaceship to the left has a V-shaped rear end, and what seems like two weapons on either side pointing forward. At least two persons inside the pursued spaceship are talking to each other, and their text comes out from two starburst on top and bottom of the spaceship.]
:Voice 1: The enemy ship is right behind us!
:Voice 2: Prepare to jump to Minkowski space on my mark.

:[Same setting, with star burst above only. The sound coming from the pursued spaceship is written inside a burst of small lines below the spaceship. Voice 2, by context, is the same as in panel 1.]
:Voice 2: Three... two... one... ''mark!''
:Click

:[Both spaceship are tilted upwards and becomes distorted so they become longer and thinner.]

:[The tilting increases and the distortion is now so pronounced that the spaceships are almost unrecognizable, almost just lines with structure. The distance between the tip of the pursuing spaceship and the pursued becomes shorter in the last two panels, but the distance between their center parts becomes larger. Up to three distinct voices are shown, here, which may include those seen in Panel 1 but with no clear relation.]
:Voice 3: Are they still getting closer?
:Voice 4: I can't tell.
:Voice 5: I think it depends on your frame of reference.

{{comic discussion}}

[[Category:Space]]
[[Category:Math]]
[[Category:Physics]]

2645: The Best Camera

2022-07-14T08:33:34Z

162.158.166.183: /* Explanation */ misspelled this damn autocorrect

{{comic
| number = 2645
| date = July 13, 2022
| title = The Best Camera
| image = the_best_camera.png
| titletext = The best camera is the one at L2.
}}

==Explanation==
{{incomplete|Created by an AMATEUR PHOTOGRAPHER - Please change this comment when editing this page. Do NOT delete this tag too soon.}}

''The Best Camera Is The One That's With You'' [https://www.goodreads.com/book/show/6921300-the-best-camera-is-the-one-that-s-with-you] is a book by photographer Chase Jarvis, celebrating mobile phone cameras, not for their photographic or technical quality but rather for the fact that you always have it when an interesting subject appears. This is advice often given to novice photographers, sometimes with the slight change "The best camera is the one you use most." A cheap {{w|Nikon Coolpix}} camera can be better than a professional {{w|Canon EOS}}, simply for the fact it is lightweight enough to be taken on ''every'' voyage you'll make. A fancy expensive camera that isn't at hand for you to use is of no value for taking pictures.

However, in this case "the best camera" refers to the {{w|James Webb Space Telescope}} (JWST), the spacecraft depicted in the third frame. It can be considered a camera because it takes pictures, and it's the best {{w|space telescope}} to date in terms of {{w|aperture}} size and thus {{w|angular resolution}}. The first pictures taken by the telescope were released on 11-12 July 2022, days before this comic was published.[https://www.nasa.gov/webbfirstimages] The pictures from JWST show objects as they were [https://webbtelescope.org/contents/media/images/2022/035/01G7HRYVGM1TKW556NVJ1BHPDZ as much as 13.1 billion years ago,] which is unprecedented. The telescope has [https://www.stsci.edu/jwst/instrumentation three instruments that can act as "cameras" for imaging,] a fourth {{w|optical spectrometer|spectrometer}}-only instrument, and 41 {{w|optical filter}}s. Because the telescope can only take infrared photographs invisible to the human eye, [https://jwst-docs.stsci.edu/files/97978094/97978104/1/1596073152120/NIRCam_filters_modules.png each of the filters has been assigned a standardized visible color] to convert images for viewing. However, astronomers are encouraged to use [https://www.youtube.com/watch?v=-dmiS_6YrGU&t=449s other color schemes] when using a subset of the filters' range or rendering {{w|interferometry}} from the [https://jwst-docs.stsci.edu/jwst-near-infrared-imager-and-slitless-spectrograph/niriss-observing-modes/niriss-aperture-masking-interferometry NIRISS Aperture Masking Interferometer] or the [https://jwst-docs.stsci.edu/jwst-mid-infrared-instrument/miri-observing-modes/miri-coronagraphic-imaging MIRI Coronagraph,] and to [https://www.youtube.com/watch?v=sNJR3lenz1I&t=293s convert very distant objects to their original color] from {{w|redshift}}ed infrared when possible.

The title text references {{w|Lagrange Point|Lagrange Point 2}} (L2). The Lagrange Points are a set of five locations which are solutions to the {{w|restricted three-body problem}}, in which one of the bodies is much less massive than the other two. A low-mass body in one of these locations is able to be stationary relative to the other two bodies with very little fuel needed for trajectory corrections. In this case, the JWST orbits around the L2 point of the Earth-Sun system [https://space.stackexchange.com/a/57378 rather than being stationed exactly at it] to avoid shadows from the Earth and Moon that would cause harmful temperature and power variations.[https://ntrs.nasa.gov/citations/20190028885] It avoids the problem the {{w|Hubble Space Telescope}} had orbiting the Earth, allowing only a short observation window per orbit. The HST could be used for about 55 minutes of every 95-minute orbit for targets not sufficiently above or below the orbital plane.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

:[Each panel features an image of space, with text printed in white at the top of each panel. The first panel says:]
:They say the best camera is the one you have with you.

:[A panel showing more stars and galaxies visible.]
:It turns out

:[A panel showing even more stars and galaxies visible. At the center of the panel is an outline drawing in white of the James Webb Space Telescope.]
:they're wrong.

{{comic discussion}}

[[Category:Astronomy]]
[[Category:Telescopes]]

2645: The Best Camera

2022-07-14T08:32:46Z

162.158.166.183: /* Explanation */ angular resolution is a function of aperture size

{{comic
| number = 2645
| date = July 13, 2022
| title = The Best Camera
| image = the_best_camera.png
| titletext = The best camera is the one at L2.
}}

==Explanation==
{{incomplete|Created by an AMATEUR PHOTOGRAPHER - Please change this comment when editing this page. Do NOT delete this tag too soon.}}

''The Best Camera Is The One That's With You'' [https://www.goodreads.com/book/show/6921300-the-best-camera-is-the-one-that-s-with-you] is a book by photographer Chase Jarvis, celebrating mobile phone cameras, not for their photographic or technical quality but rather for the fact that you always have it when an interesting subject appears. This is advice often given to novice photographers, sometimes with the slight change "The best camera is the one you use most." A cheap {{w|Nikon Coolpix}} camera can be better than a professional {{w|Canon EOS}}, simply for the fact it is lightweight enough to be taken on ''every'' voyage you'll make. A fancy expensive camera that isn't at hand for you to use is of no value for taking pictures.

However, in this case "the best camera" refers to the {{w|James Webb Space Telescope}} (JWST), the spacecraft depicted in the third frame. It can be considered a camera because it takes pictures, and it's the best {{w|space telescope}} to date in terms of {{w|aperture}} size and this {{w|angular resolution}}. The first pictures taken by the telescope were released on 11-12 July 2022, days before this comic was published.[https://www.nasa.gov/webbfirstimages] The pictures from JWST show objects as they were [https://webbtelescope.org/contents/media/images/2022/035/01G7HRYVGM1TKW556NVJ1BHPDZ as much as 13.1 billion years ago,] which is unprecedented. The telescope has [https://www.stsci.edu/jwst/instrumentation three instruments that can act as "cameras" for imaging,] a fourth {{w|optical spectrometer|spectrometer}}-only instrument, and 41 {{w|optical filter}}s. Because the telescope can only take infrared photographs invisible to the human eye, [https://jwst-docs.stsci.edu/files/97978094/97978104/1/1596073152120/NIRCam_filters_modules.png each of the filters has been assigned a standardized visible color] to convert images for viewing. However, astronomers are encouraged to use [https://www.youtube.com/watch?v=-dmiS_6YrGU&t=449s other color schemes] when using a subset of the filters' range or rendering {{w|interferometry}} from the [https://jwst-docs.stsci.edu/jwst-near-infrared-imager-and-slitless-spectrograph/niriss-observing-modes/niriss-aperture-masking-interferometry NIRISS Aperture Masking Interferometer] or the [https://jwst-docs.stsci.edu/jwst-mid-infrared-instrument/miri-observing-modes/miri-coronagraphic-imaging MIRI Coronagraph,] and to [https://www.youtube.com/watch?v=sNJR3lenz1I&t=293s convert very distant objects to their original color] from {{w|redshift}}ed infrared when possible.

The title text references {{w|Lagrange Point|Lagrange Point 2}} (L2). The Lagrange Points are a set of five locations which are solutions to the {{w|restricted three-body problem}}, in which one of the bodies is much less massive than the other two. A low-mass body in one of these locations is able to be stationary relative to the other two bodies with very little fuel needed for trajectory corrections. In this case, the JWST orbits around the L2 point of the Earth-Sun system [https://space.stackexchange.com/a/57378 rather than being stationed exactly at it] to avoid shadows from the Earth and Moon that would cause harmful temperature and power variations.[https://ntrs.nasa.gov/citations/20190028885] It avoids the problem the {{w|Hubble Space Telescope}} had orbiting the Earth, allowing only a short observation window per orbit. The HST could be used for about 55 minutes of every 95-minute orbit for targets not sufficiently above or below the orbital plane.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

:[Each panel features an image of space, with text printed in white at the top of each panel. The first panel says:]
:They say the best camera is the one you have with you.

:[A panel showing more stars and galaxies visible.]
:It turns out

:[A panel showing even more stars and galaxies visible. At the center of the panel is an outline drawing in white of the James Webb Space Telescope.]
:they're wrong.

{{comic discussion}}

[[Category:Astronomy]]
[[Category:Telescopes]]

2643: Cosmologist Gift

2022-07-12T05:05:54Z

162.158.166.183: /* Explanation */ helped

{{comic
| number = 2643
| date = July 8, 2022
| title = Cosmologist Gift
| image = cosmologist_gift.png
| titletext = These neutrinos were freshly produced by a local source just 8 minutes ago
}}

==Explanation==
{{incomplete|Created by a MUON ON SALE, PACKAGED IN A BOX THAT A CAT MIGHT OR MIGHT NOT HAVE DIED IN- Please change this comment when editing this page. Do NOT delete this tag too soon.}}

I was only nine years old. I loved Shrek so much, I had all the merchandise and movies. I'd pray to Shrek every night before I go to bed, thanking for the life I've been given. "Shrek is love", I would say, "Shrek is life". My dad hears me and calls me a faggot. I knew he was just jealous for my devotion of Shrek. I called him a cunt. He slaps me and sends me to go to sleep. I'm crying now and my face hurts. I lay in bed and it's really cold. A warmth is moving towards me. I feel something touch me. It's Shrek. I'm so happy. He whispers in my ear, "This is my swamp". He grabs me with his powerful ogre hands, and puts me on my hands and knees. I spread my ass-cheeks for Shrek. He penetrates my butthole. It hurts so much, but I do it for Shrek. I can feel my butt tearing as my eyes start to water. I push against his force. I want to please Shrek. He roars a mighty roar, as he fills my butt with his love. My dad walks in. Shrek looks him straight in the eye, and says, "It's all ogre now". Shrek leaves through my window. Shrek is love. Shrek is life.

This comic shows a box labeled to indicate that it contains 30,000 fresh {{w|neutrino}}s and four zeptograms of {{w|dark matter}}. The box is intended as an inexpensive gift for a {{w|cosmologist}}. The gift giver didn't put those things in the box—both are simply passing through it, so the "gift" consists of exactly what was in the empty space it occupies. While the caption suggests this would be a good gift for a cosmologist, what they or anyone else would do with such a box is uncertain.

There are about a billion neutrinos per cubic meter throughout space, produced during the {{w|Big Bang}}.[https://physics.mit.edu/news/journal/physicsatmit_14_conrad/] However, the flux of "freshly produced" {{w|solar neutrino}}s at Earth is around 6.5×1010/cm2/s, yielding about 2.1 million per cubic meter, and implying the box is around 12 liters, three quarters as big as a typical {{w|breadbox}}.

Four zeptograms is a minuscule mass, equal to four sextillionths of a gram, the mass of about 200 carbon-12 atoms or around 20 to 23 {{w|amino acid}}s. There is an estimated 0.011 to 0.016 {{w|solar mass}}es of dark matter per cubic {{w|parsec}} local to the solar system,[https://iopscience.iop.org/article/10.1088/1361-6633/ac24e7/meta] or about 900 zeptograms per cubic meter, suggesting the box is closer to 4 liters. This discrepancy could imply Randall agrees with cosmologists who believe dark matter is partially composed of {{w|primordial black hole}}s,[https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.120.121301][https://www.sciencedirect.com/science/article/abs/pii/S2212686418301250?via%3Dihub][https://news.yale.edu/2021/12/16/black-holes-and-dark-matter-are-they-one-and-same][https://iopscience.iop.org/article/10.3847/2041-8205/823/2/L25][https://iopscience.iop.org/article/10.1088/1475-7516/2010/04/023] instead of being composed entirely of ubiquitous subatomic particles. This comic coincided with the [https://www.nasa.gov/image-feature/goddard/2022/nasa-s-webb-delivers-deepest-infrared-image-of-universe-yet first James Webb Space Telescope science image release to the public] containing {{w|gravitational lens|gravitationally lensed}} very distant {{w|quasar}}s and {{w|population III star}}s, the spectra of which can be used to test [https://twitter.com/SheerPriya/status/1546576050976870400/photo/1 certain hypotheses associated with dark matter being black holes.] A billion neutrinos have a mass of only about 2×10-12 zeptograms, at about 0.1 {{w|electron volt}}s each.

The "local source" mentioned in the title text is a joke about the commercial value of fresh, locally produced items, but the comic means that the neutrinos come from the Sun. It takes solar neutrinos slightly more than 8 minutes to reach Earth once they're emitted, roughly the same time as photons take to make the trip. (This doesn't include the [https://en.wikipedia.org/wiki/Radiative_zone approximately 170,000 years] that energy takes to get from the Sun's core to where photons are emitted at its surface.) However, as the neutrinos are not slowed down inside the Sun and have been travelling at about 99.9999999999% of the speed of light, they will have aged by less than a millisecond,[https://www.omnicalculator.com/physics/time-dilation] and so are technically even fresher than indicated.

==Transcript==

:[A picture of a box with writing on one side. The box's lid is slightly hanging off the right edge of the box so you can see inside. The inside of the box is black.]

:30,000 neutrinos
:Freshly produced
:Plus 4 zeptograms
:of dark matter

:[Caption below the panel]:
:Cosmologists are easy to shop for because you can just get them a box.

{{comic discussion}}
[[Category:Astronomy]]

2636: What If? 2 Countdown

2022-06-24T20:49:22Z

162.158.166.183: /* Explanation */ fill blanks with common knowledge conversions, and their reciprocals to prevent redundancy

{{comic
| number = 2636
| date = June 22, 2022
| title = What If? 2 Countdown
| image = what_if_2_countdown.png
| titletext = If you don't end the 99 Bottles of Beer recursion at N=0 it just becomes The Other Song That Never Ends.
}}

==Explanation==
{{incomplete|Created by FOUR SCORE AND 7 BOTTLES OF BEER ON THE WALL - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
This comic takes the idea of {{w|Advent calendar}}s, and takes it to the extreme. It uses rather absurd and/or obscure ways to measure the amount of time until [[Randall]]'s new book [https://xkcd.com/whatif2 ''What if? 2''] is released, with esoteric units or esoteric numbers. And often both.

Some concepts that appear several times throughout the calendar are:

* '''{{w|SI prefixes}}''', which can be applied to the beginning of a unit's name to multiply or divide the unit by powers of 10 or 1,000. This is standard for units like meters and grams, but is rarely applied to measurements of time other than when a unit of less than one second is needed, most commonly in various fields of science and engineering such as physics and electronics.
* The '''{{w|Gettysburg Address}}''', a famous speech delivered by U.S. president Abraham Lincoln in 1863, where he began by referring to the signing of the Declaration of Independence taking place "four score and seven years ago". A score is a dated term for the number 20, so "four score and seven" is equivalent to 87.
* A '''dog year''' is traditionally considered to be one-seventh the length of a normal human year, since a dog's overall lifespan is roughly one-seventh of a typical human's. The comic applies this to other units of time, such as minutes and months, each of which is also one-seventh the length of the standard unit. The number 7 (traditionally a "lucky number") is also used in many of the numbers quoted in the calendar.
* Other comparative durations of time that are not normally or usefully applied to day-length multiples. At the top end, there is the age of the universe, at the other there is {{w|Planck units#Planck time|Planck-time}} – with entire durations of periods of human history and the time needed to watch popular TV/film franchises in-between – most of which require a non-trivial multiplier or divisor to bring them to the necessary scale required.
* A '''{{w|baker's dozen}}''' is 13, or one more than a normal dozen. Here, the "baker's" prefix can be applied to any unit by adding an extra one of its constituent parts, like an extra hour added to a day.
* '''{{w|Irrational numbers}}''' like {{w|pi}} (3.14159...), {{w|Euler's number}} or ''e'' (2.71828...), the {{w|golden ratio}} (1.61803...), and the {{w|square root of 2}} (1.41421...). These are all interesting numbers because of their mathematical properties, but very impractical to use as arbitrary measurements of time because they have an endless series of non-repeating decimal digits.
* The teenage dating game '''{{w|Seven minutes in heaven}}'''.
* Rotation and revolution periods of various planets and moons in the Solar System.

{| class="wikitable"
|-
! Days left !! Date !! Duration specified !! Duration in days !! Explanation
|-
| 83 || Jun 22 || πe millidecades || 82.03 days || π ≈ 3.14159, e ≈ 2.718, so πe is about 22.459. A millidecade is 1/1000 decade, or 1/100 year, or 3.652425 days. Multiplying these results in 82.03 days. This is a play on {{w|Euler's identity}}, eiπ=-1, but raising pi to the power of e instead.
|-
| 82 || Jun 23 || 7 megaseconds || 81.02 days || 7,000,000 seconds
|-
| 81 || Jun 24 || e lunar months || 80.27 days || A lunar month ≈ 29.53059 days, e ≈ 2.718
|-
| 80 || Jun 25 || 60 rotations of Foucault's pendulum in Paris || 79.67 days || '''{{w|Paris}}''' is the capital city of '''{{w|France}}''' and it's located at a latitude of 48º 51' 23" N. '''{{w|Foucault's pendulum}}''' is a device conceived by French physicist '''{{w|Léon Foucault}}''', consisting of a pendulum that is free to rotate its plane of oscillation. When placed in a rotating '''{{w|Non-inertial reference frame}}''' such as the '''{{w|Earth}}''', that has an associated rotation period of 24 hours, the oscillation plane of Foucault's pendulum rotates at a rate determined by the Earth's period and the angle between the rotation axis of the frame of reference and the direction of its elongation in resting position, i.e. its latitude, with a period T = T🜨/sin(λ), being T🜨 Earth's period and λ the latitude of the pendulum. Historically, Léon Foucault performed this experiment in the city of Paris, most famously (although not for the first time, which happened at the '''{{w|Paris Observatory}}''') under the dome of the '''{{w|Panthéon}}''', to demonstrate Earth's rotation. At this latitude, Foucault's pendulum completes a full rotation every 31.8 hours.
|-
| 79 || Jun 26 || 8 milligenerations || 78.89 days || A generation is in general 22-33 years, with a reasonable mid-point of 27; and 8 x 0.001 (milli) x 365.2425 (accounting for leap years) x 27 ≈ 78.89 days
|-
| 78 || Jun 27 || 777,777 dog minutes || 77.16 days || A popular myth is that dogs age 7 times faster than humans, so 1 dog minute equals 1/7 human minutes.
|-
| 77 || Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads) || 77+ days || 7! = 7x6x5x4x3x2x1 = 5040. The standard episode of ''Jeopardy'' is 22-26 minutes, skipping ads. At 22 minutes each, the total is 110880 minutes, or exactly 77 days.
|-
| 76 || Jun 29 || 5,000 repeats of ''99 Bottles of Beer'' || 76.39 days || Each verse of {{w|99 Bottles of Beer}} is "''N'' bottles of beer on the wall, ''N'' bottles of beer. Take one down, pass it around, ''N-1'' bottles of beer on the wall." The entire song contains 99 verses. Randall apparently sings this rather slowly at around 72 bpm, taking about 13 seconds per verse.
|-
| 75 || Jun 30 || 5 baker's fortnights || 75 days || A {{w|baker's dozen}} is a dozen (12) plus 1 extra item. Randall has generalized this to adding 1 to any unit. A fortnight is 2 weeks, so a baker's fortnight is 15 days. 5x15 is 75 days.
|-
| 74 || Jul 1 || √2 dog years || 73.79 days || See day 78 (Jun 27)
|-
| 73 || Jul 2 || π millivics (1/1000th of Queen Victoria's reign) || 72.97 days || {{w|Queen Victoria}} ruled between 20 June 1837 and 22 January 1901 (23,226 days).
|-
| 72 || Jul 3 || 42 drives from NYC to LA (Google Maps estimate) || 71.75 days || According to Google Maps, the drive from New York City to Los Angeles via I-80 W (2789 miles or 4489 km) takes 41 hours.
|-
| 71 || Jul 4 || 1,000 viewings of ''Groundhog Day''|| 70.14 days || Using {{w|Groundhog Day (film)|Groundhog Day's}} 101-minute run time.
|-
| 70 || Jul 5 || 100,000 minutes || 69.44 days || 1,440 minutes per day
|-
| 69 || Jul 6 || 1/10th of Martian year || 68.70 Earth days || Martian sidereal and tropical years both round to 687.0 Earth days
|-
| 68 || Jul 7 || 1,234,567 sound-miles || 67.63 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 67.6349058 days.
|-
| 67 || Jul 8 || 2πe seconds || 66.74 days || 2^(π^e) = 5,766,073 seconds
|-
| 66 || Jul 9 || 216 beats (Swatch Internet Time) || 65.54 days || A "{{w|.beat}}" is equal to 1/1000 day.
|-
| 65 || Jul 10 || 1,000 ISS orbits || 64.58 days || Each orbit of the ISS takes 90-93 minutes. Here a value of 93 minutes is used.
|-
| 64 || Jul 11 || Five hundred twenty five thousand (base seven) minutes|| 62.88 days || This refers to {{w|radix}}-7 arithmetic: 525,0007 minutes = 90,55210 minutes. Also references the opening and recurring line "Five hundred twenty five thousand six hundred minutes" from {{w|Seasons of Love}}, a song from the musical {{w|Rent (musical)|''Rent''}}, which is also referenced in [[1047: Approximations]]. "base seven" has the same rhythm as "six hundred".
|-
| 63 || Jul 12 || 1050 Planck times || 62.38 days || 10^50 x 5.39 x 10^-44 seconds
|-
| 62 || Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)|| 62.50 days || {{w|The Office (British TV series)|''The Office''}} was originally a {{w|BBC}} television show which had no commercial breaks, but Randall is obviously more familiar with the {{w|The Office (American TV series)|US version}}. This US "half-hour" comedy format contains 22.5 minutes of content (including the title sequence) and 7.5 minutes of ads. 
|-
| 61 || Jul 14 || Four score and seven kilominutes || 60.42 days || 87 x 1000 minutes
|-
| 60 || Jul 15 || 2 lunar months || 59.06 days || There are a number of different ways to define the {{w|lunar month}}. The most common is the synodic month, because it relates to the phases of the moon, and it's approximately 29.53 days.
|-
| 59 || Jul 16 || Half a day on Venus || 58.38 Earth days || A Venus synodic day is 116 days 18 hours.
|-
| 58 || Jul 17 || 5 megaseconds || 57.87 days || 5,000,000 seconds
|-
| 57 || Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature) || 57.21 days || 5222 years × 30 × 10-6. 3200 BCE is the approximate date of pre-Sumerian proto-writing as given in {{w|History of writing|Wikipedia's article on the history of writing}}.
|-
| 56 || Jul 19 || 1,000 viewings of ''Run Lola Run'' || 55.57 days || Using {{w|Run Lola Run|the movie's}} run time of 80 minutes.
|-
| 55 || Jul 20 || One million sound-miles || 54.78 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 54.7843137 days.
|-
| 54 || Jul 21 || 30 Ionian months || 53.07 days || Orbital period of Io around Jupiter is approximately 1.77 days.
|-
| 53 || Jul 22 || One dog year || 52.18 days || See day 78 (Jun 27)
|-
| 52 || Jul 23 || 60 viewings of ''Star Wars Episodes I-IX'' || 51.75 days || According to [https://dorksideoftheforce.com/2021/05/04/how-long-to-watch-every-star-wars-movie/ Fansided] the combined running times are 20 hours 42 minutes.
|-
| 51 || Jul 24 || 1/100,000,000,000th of the universe's age || 50.40 days || The universe is estimated to be about 13.8 billion years old.
|-
| 50 || Jul 25 || 5 milli-generations || 49.3 days || See day 79 (Jun 26)
|-
| 49 || Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven'' || 48.61 days || {{w|Seven minutes in heaven}} is an Anglo-culture teenager game, occuring in several movies. 10,000 minutes in Heaven is almost a week of making out (or doing whatever in a broom closet), so this game is unlikely.
|-
| 48 || Jul 27 || φeπ minutes || 47.62 days || 68,567.57 minutes
|-
| 47 || Jul 28 || 4 megaseconds || 46.30 days || 4,000,000 seconds
|-
| 46 || Jul 29 || 216 minutes || 45.51 days || 65,536 minutes
|-
| 45 || Jul 30 || eee seconds || 44.15 days || 3,814,279.10 seconds
|-
| 44 || Jul 31 || π fortnights|| 43.98 days || 3.14159 x 14 days
|-
| 43 || Aug 1 || One devil's spacewalk (666 orbits of the ISS) || 43.01 days || See day 65 (Jul 10). 666 is the {{w|number of the beast}}.
|-
| 42 || Aug 2 || 1 kilowatt-hour per watt || 41.66 days || 1000 hours
|-
| 41 || Aug 3 || eπ Ionian months || 40.94 days || Orbital period of Io around Jupiter is 1.769137786 days
|-
| 40 || Aug 4 || 30 rotations of Foucault's pendulum in Paris || 39.84 days || Refer to Day 80 (Jun 25)
|-
| 39 || Aug 5 || e fortnights || 38.06 days ||2.71828 x 14 days
|-
| 38 || Aug 6 || πe baker's days (25 hours) || 37.98 days || See day 75 (Jun 30)
|-
| 37 || Aug 7 || One deciyear || 36.52 days || One tenth of one year
|-
| 36 || Aug 8 || 7! milliweeks || 35.28 days || 5040 × 0.001 weeks
|-
| 35 || Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music || 34.72 days || ''Think'' is the music played while the contestants try to answer the Final Jeopardy question; it is 30 seconds long.
|-
| 34 || Aug 10 || 1000 basketball games (game time) || 33.33 days || Uses the NBA game time of four 12-minute quarters, or 48 minutes
|-
| 33 || Aug 11 || 777 hours || 32.38 days || 24 hours per day
|-
| 32 || Aug 12 || One millilincoln (1/1000 of fourscore and seven years) || 31.78 days || {{w|Abraham Lincoln}}'s {{w|Gettysburg Address}} begins with the famous phrase "Four score and seven years ago". 1 score = twenty. 
|-
| 31 || Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads) || 31.25 days || Uses a television 'hour' containing 45 minutes of content and 15 minutes of ads
|-
| 30 || Aug 14 || All of ''Star Trek'', consecutively || 27.16* days || As per [https://redshirtsalwaysdie.com/2021/01/22/take-far-longer-watch-star-trek-think/ RedShirtsAlwaysDie.com] of January 22, 2021. *Note well: dozens of additional ''Star Trek'' franchise episodes have been produced since, and more are presently scheduled to be released through June, July, and August, so this value is somewhat indeterminate over the scope of the countdown.
|-
| 29 || Aug 15 || 777,777 nanocenturies || 28.41 days || 777,777 × 10-9 × 100 years
|-
| 28 || Aug 16 || One sidereal lunar month || 27.3 days || The time it takes moon to return to the same position relative to the fixed stars
|-
| 27 || Aug 17 || 6 dog months || 26.1 days || See day 78 (Jun 27)
|-
| 26 || Aug 18 || ππ kilominutes || 25.32 days || 36,462.16 minutes
|-
| 25 || Aug 19 || 7 games of 7! minutes in Heaven || 24.5 days || 7 x 5040 (7 {{w|Factorial}}) minutes. See also day 49 (Jul 26).
|-
| 24 || Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy || 23.82 days || ''The Fellowship of the Ring'' extended version is 208 minutes, ''The Two Towers'' is 226 minutes, and ''The Return of the King'' is 252 minutes for its e.v., according to [https://fictionhorizon.com/how-long-are-all-the-lord-of-the-rings-and-the-hobbit-movies-combined/ FictionHorizon.com]
|-
| 23 || Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times || 22.21 days || See day 72 (Jul 3). This is for 6 round-trips and 1 one-way trip.
|-
| 22 || Aug 22 || ''It's a Small World'' sung at 1/10,000th speed || 21.18 days || {{w|It's a Small World}} is a song that was composed for the attraction of the same name at various {{w|Disney}} theme parks, and plays continuously at them in various languages.
|-
| 21 || Aug 23 || 500 hours || 20.83 days || 24 hours per day
|-
| 20 || Aug 24 || √2 fortnights || 19.80 days || 1.4142 × 14 days
|-
| 19 || Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles || 18.94 days || {{w|Vanessa Carlton}} is an American singer, and {{w|A Thousand Miles}} is her most successful song. Randall estimates her walking speed at about 2.2 miles/hour.
|-
| 18 || Aug 26 || 100,000 breaths || 15 seconds per breath for 17 days || Normal respiratory rate for adults is typically 12-20 breaths per minute, or about 3-4 seconds each. Randall may be a practitioner of "[https://www.frontiersin.org/articles/10.3389/fnhum.2018.00353/full slow breathing.]"
|-
| 17 || Aug 27 || √2 megaseconds || 16.37 days || 1.4142 × 1,000,000 seconds
|-
| 16 || Aug 28 || πππ πcoseconds || 15.51 days || 1.3402 × 1018 picoseconds (i.e., 10-12 seconds), making a joke how the mathematical "pi" is written with the character "π"
|-
| 15 || Aug 29 || One baker's fortnight (15 days) || 15 days || See day 75 (Jun 30)
|-
| 14 || Aug 30 || One baker's dozen (13) baker's days (25 hours) || 13.54 days || 325 hours; see day 75 (Jun 30)
|-
| 13 || Aug 31 || 300 hours || 12.5 days || 0.04167 days per hour
|-
| 12 || Sep 1 || One million seconds || 11.57 days || 86,400 seconds per day
|-
| 11 || Sep 2 || One nonstop bike ride from NYC to LA || 10.54 days || Google maps estimates the trip at 253 hours
|-
| 10 || Sep 3 || 1⁄1,000th of a generation || 9.86 days || See day 79 (Jun 26)
|-
| 9 || Sep 4 || 777,777 seconds || 9.002 days || 1.15741×10-5 days per second
|-
| 8 || Sep 5 || 100 viewings of ''Groundhog Day'' || 7.01 days || See Day 71 (Jul 4).
|-
| 7 || Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven) || 6.04 days || 8,700 minutes
|-
| 6 || Sep 7 || One pico-universe-lifetime || 5.04 days || See Day 51 (Jul 24)
|-
| 5 || Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks || 4.63 days || The chorus lasts about 8 seconds per 'person'
|-
| 4 || Sep 9 || One centiyear || 3.65 days || 365.24 days/100
|-
| 3 || Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times || 2.79 days || Based on a length of 4 minutes, 1 second
|-
| 2 || Sep 11 || ''Speed'' (1994) played at one frame per second || 1.9 days || {{w|Speed (1994 film)}} has runtime of 116 minutes = 6,960 seconds = 167,040 film frames at standard frame rate of 24 frames/second
|-
| 1 || Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1) || 0.76 days || Each iteration contains ''N'' verses. ''N + N-1 + N-2 ... + 1'' equals ''N * (N+1) / 2'', so 99 recursions = 4950 verses. Using the same 13-second (72 bpm) rate as Jun 29, this is close to 18 hours. Probably refers to Donald Knuth's article {{w|The Complexity of Songs}}.
|-
| 0 || Sep 13 || ''What If? 2'' release day || N/A ||
|}

The title text refers to the recursive time period on Sep 12. If you don't stop when you reach N=0 bottles, the repetition never ends, so that time interval becomes infinite. He likens it to {{w|The Song That Never Ends}}, another repetitive children's song, which is specifically intended to go on forever. The difference is that the Beer song has a natural stopping point at 0, while ''The Song That Never Ends'' is completely repetitive.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

Large heading: Countdown to ''What if? 2''

Subheading: (Preorder at [https://xkcd.com/whatif2 xkcd.com/whatif2] to get it at the end of the countdown)

Remainder of comic is a calendar with the date in one corner of each day's box.

{| class="wikitable"
|-
! Date !! Description
|-
| Jun 22 || πe millidecades
|-
| Jun 23 || 7 megaseconds
|-
| Jun 24 || e lunar months
|-
| Jun 25 || 60 rotations of Foucault's pendulum in Paris
|-
| Jun 26 || 8 milligenerations
|-
| Jun 27 || 777,777 dog minutes
|-
| Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads)
|-
| Jun 29 || 5,000 repeats of ''99 Bottles of Beer''
|-
| Jun 30 || 5 baker's fortnights (15 days)
|-
| Jul 1 || √2 dog years
|-
| Jul 2 || π millivics (1/1000th of Queen Victoria's reign)
|-
| Jul 3 || 42 drives from NYC to LA (Google Maps estimate)
|-
| Jul 4 || 1,000 viewings of ''Groundhog Day''
|-
| Jul 5 || 100,000 minutes
|-
| Jul 6 || 1/10th of Martian year
|-
| Jul 7 || 1,234,567 sound-miles
|-
| Jul 8 || 2πe seconds
|-
| Jul 9 || 216 beats (Swatch Internet Time)
|-
| Jul 10 || 1,000 ISS orbits
|-
| Jul 11 || Five hundred twenty five thousand (base seven) minutes (text preceded by several drawn musical notes)
|-
| Jul 12 || 1050 Planck times
|-
| Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)
|-
| Jul 14 || Four score and seven kilominutes
|-
| Jul 15 || 2 lunar months
|-
| Jul 16 || Half a day on Venus
|-
| Jul 17 || 5 megaseconds
|-
| Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature)
|-
| Jul 19 || 1,000 viewings of ''Run Lola Run''
|-
| Jul 20 || One million sound-miles
|-
| Jul 21 || 30 Ionian months
|-
| Jul 22 || One dog year
|-
| Jul 23 || 60 viewings of ''Star Wars Episodes I-IX''
|-
| Jul 24 || 1/100,000,000,000th of the universe's age
|-
| Jul 25 || 5 milli-generations
|-
| Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven''
|-
| Jul 27 || φeπ minutes
|-
| Jul 28 || 4 megaseconds
|-
| Jul 29 || 216 minutes
|-
| Jul 30 || eee seconds
|-
| Jul 31 || π fortnights
|-
| Aug 1 || one devil's spacewalk (666 orbits of the ISS)
|-
| Aug 2 || 1 kilowatt-hour per watt
|-
| Aug 3 || eπ Ionian months
|-
| Aug 4 || 30 rotations of Foucault's pendulum in Paris
|-
| Aug 5 || e fortnights
|-
| Aug 6 || πe baker's days (25 hours)
|-
| Aug 7 || one deciyear
|-
| Aug 8 || 7! milliweeks
|-
| Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music
|-
| Aug 10 || 1000 basketball games (game time)
|-
| Aug 11 || 777 hours
|-
| Aug 12 || one millilincoln (1/1000 of fourscore and seven years)
|-
| Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads)
|-
| Aug 14 || All of ''Star Trek'', consecutively
|-
| Aug 15 || 777,777 nanocenturies
|-
| Aug 16 || one sidereal lunar month
|-
| Aug 17 || 6 dog months
|-
| Aug 18 || ππ kilominutes
|-
| Aug 19 || 7 games of ''7! minutes in Heaven''
|-
| Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy
|-
| Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times
|-
| Aug 22 || ''It's a Small World'' sung at 1/10,000th speed
|-
| Aug 23 || 500 hours
|-
| Aug 24 || √2 fortnights
|-
| Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles
|-
| Aug 26 || 100,000 breaths
|-
| Aug 27 || √2 megaseconds
|-
| Aug 28 || πππ πcoseconds
|-
| Aug 29 || One baker's fortnight (15 days)
|-
| Aug 30 || One baker's dozen (13) baker's days (25 hours)
|-
| Aug 31 || 300 hours
|-
| Sep 1 || One million seconds
|-
| Sep 2 || One nonstop bike ride from NYC to LA
|-
| Sep 3 || 1⁄1,000th of a generation
|-
| Sep 4 || 777,777 seconds
|-
| Sep 5 || 100 viewings of ''Groundhog Day''
|-
| Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven)
|-
| Sep 7 || One pico-universe-lifetime
|-
| Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks
|-
| Sep 9 || One centiyear
|-
| Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times
|-
| Sep 11 || ''Speed'' (1994) played at one frame per second
|-
| Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1)
|-
| Sep 13 || ''What If? 2'' release day
|}
{{comic discussion}}
[[Category:Book promotion]]
[[Category:Comics featuring real people]]
[[Category:Songs]]
[[Category:Animals]]

Talk:2636: What If? 2 Countdown

2022-06-24T20:43:37Z

162.158.166.183: reply

I've started the table to explain all the calendar entries. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 00:19, 23 June 2022 (UTC)

Is the dog minutes calculation backwards? 777,777 dog minutes should be 777,777 x 7 human minutes, which is over 10 years. Randall seems to be dividing instead of multiplying. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 00:36, 23 June 2022 (UTC)
: No - 1 human year = 7 dog years; 1 dog year = 1/7 human year; 1 dog minute = 1/7 human minute; 777,777 dog minutes = 111,111 human minutes = 77 days, 3 hours, 51 minutes. [[Special:Contributions/172.70.90.173|172.70.90.173]] 11:32, 23 June 2022 (UTC)

First entry is probably mistake by Randall, e^pi would give value of 84.5 [[Special:Contributions/162.158.203.38|162.158.203.38]] 11:57, 23 June 2022 (UTC)
: That would be too high, though. 82.xxx days (from midnight at the start of launch day) would fall within the 83rd day before it (Jun 22). 84.5 would fall within the 85th (Jun 20). [[Special:Contributions/172.70.91.58|172.70.91.58]] 12:15, 23 June 2022 (UTC)

Not sure if this is even worth mentioning, but he forgot the box around the date number in the top corner for August 29th. [[Special:Contributions/172.70.126.151|172.70.126.151]] 12:49, 23 June 2022 (UTC)

Fyi, used wolfram alpha for most of the calculations. Seems to be able to handle anything I throw at it (nanocenturies, megaseconds, fortnights etc) [[User:Aditya95sriram|Aditya95sriram]] ([[User talk:Aditya95sriram|talk]]) 13:02, 23 June 2022 (UTC)aditya95sriram

Some of the calculations done forward (assuming what Randall means as a Generation, for example) might be best done as "to get this many days, what does Randall think ilhe is starting from. And see if 365, 365.25 or even 365.24 days per year works best, where relevent. Although I think in many cases you'll find the fractional differences negligable, when done right. (I'm also a bit surprised by the off-by-one errors in days-to-go and derived value, but I suspect that this is because of [[2585: Rounding|assymetric rounding effects]] that would be revealed by running the assumption backwards and seeing how different (or otherwise) the decimals actually are.) [[Special:Contributions/172.70.85.211|172.70.85.211]] 13:32, 23 June 2022 (UTC)
: I would suggest using 365.2425 days per year, as that's consistent with current leap year conventions. [[User:Dansiman|Dansiman]] ([[User talk:Dansiman|talk]]) 21:49, 23 June 2022 (UTC)
:: Did not see your comment, but already done trivial replacement. No recalculation that goes more complicated than magnitude, though.
::(For the mathematically curious, in the Gregorian calendar it's normally 365 days, but a leap day every four years (+0.25 => 365.25), except no leap day every century (-0.01 => 365.24), except there is every fourth century (+0.0025 => 365.2425). Which is very very close to the more astronomically-precise figure of 365.2422, at least at this point in our planet's history and definitely over the timescale of the Gregorian calendar itself. ''edit-to-add-convoluted-musings'': A successor system ''might'' need to de-reinstate three of the Four-Millenial leap-days in every 10,000 year period, or perhaps by re-removing four of its various leap-days then re-reinstating one of ''those'' back again, but by the time it's relevent I doubt that 365.2422 is going to be as valid for whatever reason... Hey, by then, maybe we could just deliberately adjust the Earth in or out a bit to make it a better fraction/not a fraction at all! )
::On the other hand, the old adage is "no use being precise over imprecise details". One can perhaps apply it to nominal decades (the true average decade; though a given decade might be 10*365 days plus either ''two'' or ''three'' leap-days, for 3652.5±0.5 days in that instance... not equally likely each way, though) but the Generations calculation already ''assumes'' 27 years per generation (not even 27.5, exactly half way between 22 and 33, which already seems a dubious backformation to suit other purposes) and gets a good-enough ''approximate'' number. Using a factor precise to around 1 in 146000 alongside one that's unlikely to be even as accurate as 1 in 54 is a bit rich and overly anal (rather than analytic) in the long-run.
::But this is explainxkcd, so I'm not saying it's misplaced, just that those who would be pedantic about everything (myself included) might find themselves even more out-pedanted in very reasonable circumstances... ;) [[Special:Contributions/172.70.162.77|172.70.162.77]] 22:47, 23 June 2022 (UTC)

Not sure about most numbers but at least the order of magnitude seemed plausible. I can't quite find a proper way to read August 28th. π^π^π is roughly 80662.666 - if you read πcoseconds as "picoseconds", that's way less than a second. I have no idea what π * coseconds are supposed to be. π * c * o * seconds doesn't look much better - there are values associated with "c" (speed of light, for example) but I have no idea what "o" could be and certainly nothing that would make this a unit of time. Sixteen days would be 1,353,600,000,000,000,000 ps (picoseconds). π^π^π^π is three orders of magnitude too small, π^π^π^π^π is many orders of magnitude too big a number. Am I missing something (really obvious, maybe?) here? [[User:627235|627235]] ([[User talk:627235|talk]]) 14:52, 23 June 2022 (UTC)
: Exponent towers are by convention evaluated top-down, so pi^pi^pi should be read as pi^(pi^pi), which is ~1.34e18, which in picoseconds is ~15.51 days. [[Special:Contributions/172.70.114.71|172.70.114.71]] 15:21, 23 June 2022 (UTC)

10,000 minutes in Heaven is making out for a week. I was able to find a record for the longest kiss (58 hours, 35 minutes), but not the longest make-out session. I think Randall may be indulging in some nerdy wishfull thinking. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 15:27, 23 June 2022 (UTC)

When the beer song reached F(0) how would you 'take one down' from -1 bottles of beer? Would they be imaginary bottles of beer? (Joking) At F(n-1) would there be a matter/antimatter annihilation, where Randal could do a riff of What-If #1 and describe the play by play of the bartender turning into exotic forms of matter? [[Special:Contributions/172.69.68.88|172.69.68.88]] 15:58, 23 June 2022 (UTC)
:(Not ✓-1, it's just straight repeated subtraction, not a power function...) After so much beer, you probably think it a good idea (even necessary) to fill cans up and start to put them back up on the wall... Not sure you could sustain it, to the point of F(-99), but I think someone'd be more than ready to start the process when F(-1) is invoked, for any group of just a few likely individuals.. [[Special:Contributions/172.70.91.58|172.70.91.58]] 16:23, 23 June 2022 (UTC)
:This begs the question of what beer bottles are doing on a wall, rather than a shelf. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 16:26, 23 June 2022 (UTC)
: Randall already considered what happens at F(0), refer to the title text. [[User:Paddles|Paddles]] ([[User talk:Paddles|talk]]) 08:16, 24 June 2022 (UTC)
: If you wanted to take down an imaginary bottle of beer, you'd have to take it from another wall that runs orthogonal to the original wall. [[Special:Contributions/172.70.85.211|172.70.85.211]] 08:50, 24 June 2022 (UTC)

We've finally filled in all the units columns in the table. Hopefully someone can automate turning that into a transcript. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 16:51, 23 June 2022 (UTC)

Funfact: This comic mentions Cyndi Lauper by name, and it was published on her birthday… [[Special:Contributions/162.158.38.27|162.158.38.27]] 20:51, 23 June 2022 (UTC)
:Sweet! I'm a big fan of playing ''Time after Time'' on repeat to get into a flow state, so I loved that one. [[Special:Contributions/162.158.166.183|162.158.166.183]] 20:43, 24 June 2022 (UTC)

Looks like someone's math is wrong on the explanation for July 18. I calculated using 4681 and 4763 years and they came out to 51.29 days and 52.19 days, respectively. So then I worked backwards and determined that Randall would actually have to be using a number closer to 5200 years to arrive at the correct result of 57 days. [[User:Dansiman|Dansiman]] ([[User talk:Dansiman|talk]]) 21:49, 23 June 2022 (UTC)

Randall seems to be wrong about "It's a Small World". The song is about 2 minutes long, so at 1/10,000 speed it's 20,000 minutes = 14 days. He seems to be using a length a little over 3 minutes. I found a YouTube video of the ride that's 3:45, but the song ends at 2:15 and the rest is silent. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 22:16, 23 June 2022 (UTC)
:[https://www.youtube.com/watch?v=PxRW-duSCLA This video of it] on YouTube lasts 3:02. It was uploaded by Universal Music Group (allied with Disney), making it some kind of 'official' version, and its length fits Randall's calculation. (Also, thanks for making the table!) [[User:DKMell|DKMell]] ([[User talk:DKMell|talk]]) 22:38, 23 June 2022 (UTC)
::That could be it. It has a long instrumental coda after the singing is done. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 14:07, 24 June 2022 (UTC)

Could "eπ Ionian months" also be a very subtle reference to the {{w|Euler identity}} given the first two characters of Ionian? Or am I reading/visualising a bit too much into it? [[User:Paddles|Paddles]] ([[User talk:Paddles|talk]]) 08:16, 24 June 2022 (UTC)

Aug 26 needs editing, but I just reset my password and can't fix it. At 4 breaths per minute, 100,000 breaths is 17.36 days. To get 17 days exactly, Randall would need to assume about 4.085 breaths per minute. [[User:Wjw|Wjw]] 08:24, 24 June 2022 (UTC)
:Most of the calculations are very approximate. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 14:07, 24 June 2022 (UTC)
::Many of them were given to subsecond digits of precision, too, so I rounded everything off to two significant digits of days unless there was some compelling reason to have 0, 1, or 3. Don't @ me, because I filled up and homogenized all that column, finally (except for 100,000 breaths, which are slow enough to be what I'm guessing is probably Randall's error.) If someone wants to get a better value for the total duration of ''Star Trek'' than the January, 2021 reference I found by counting all the released episodes since up to the date of the cartoon, please do. [[Special:Contributions/162.158.166.183|162.158.166.183]] 20:26, 24 June 2022 (UTC)

There's a closing /div HTML tag on the front page after the transcript (but not on this page). [[User:Nitpicking|Nitpicking]] ([[User talk:Nitpicking|talk]]) 17:21, 24 June 2022 (UTC)

2636: What If? 2 Countdown

2022-06-24T20:36:41Z

162.158.166.183: /* Explanation */ copyedit

{{comic
| number = 2636
| date = June 22, 2022
| title = What If? 2 Countdown
| image = what_if_2_countdown.png
| titletext = If you don't end the 99 Bottles of Beer recursion at N=0 it just becomes The Other Song That Never Ends.
}}

==Explanation==
{{incomplete|Created by FOUR SCORE AND 7 BOTTLES OF BEER ON THE WALL - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
This comic takes the idea of {{w|Advent calendar}}s, and takes it to the extreme. It uses rather absurd and/or obscure ways to measure the amount of time until [[Randall]]'s new book [https://xkcd.com/whatif2 ''What if? 2''] is released, with esoteric units or esoteric numbers. And often both.

Some concepts that appear several times throughout the calendar are:

* '''{{w|SI prefixes}}''', which can be applied to the beginning of a unit's name to multiply or divide the unit by powers of 10 or 1,000. This is standard for units like meters and grams, but is rarely applied to measurements of time other than when a unit of less than one second is needed, most commonly in various fields of science and engineering such as physics and electronics.
* The '''{{w|Gettysburg Address}}''', a famous speech delivered by U.S. president Abraham Lincoln in 1863, where he began by referring to the signing of the Declaration of Independence taking place "four score and seven years ago". A score is a dated term for the number 20, so "four score and seven" is equivalent to 87.
* A '''dog year''' is traditionally considered to be one-seventh the length of a normal human year, since a dog's overall lifespan is roughly one-seventh of a typical human's. The comic applies this to other units of time, such as minutes and months, each of which is also one-seventh the length of the standard unit. The number 7 (traditionally a "lucky number") is also used in many of the numbers quoted in the calendar.
* Other comparative durations of time that are not normally or usefully applied to day-length multiples. At the top end, there is the age of the universe, at the other there is {{w|Planck units#Planck time|Planck-time}} – with entire durations of periods of human history and the time needed to watch popular TV/film franchises in-between – most of which require a non-trivial multiplier or divisor to bring them to the necessary scale required.
* A '''{{w|baker's dozen}}''' is 13, or one more than a normal dozen. Here, the "baker's" prefix can be applied to any unit by adding an extra one of its constituent parts, like an extra hour added to a day.
* '''{{w|Irrational numbers}}''' like {{w|pi}} (3.14159...), {{w|Euler's number}} or ''e'' (2.71828...), the {{w|golden ratio}} (1.61803...), and the {{w|square root of 2}} (1.41421...). These are all interesting numbers because of their mathematical properties, but very impractical to use as arbitrary measurements of time because they have an endless series of non-repeating decimal digits.
* The teenage dating game '''{{w|Seven minutes in heaven}}'''.
* Rotation and revolution periods of various planets and moons in the Solar System.

{| class="wikitable"
|-
! Days left !! Date !! Duration specified !! Duration in days !! Explanation
|-
| 83 || Jun 22 || πe millidecades || 82.03 days || π ≈ 3.14159, e ≈ 2.718, so πe is about 22.459. A millidecade is 1/1000 decade, or 1/100 year, or 3.652425 days. Multiplying these results in 82.03 days. This is a play on {{w|Euler's identity}}, eiπ=-1, but raising pi to the power of e instead.
|-
| 82 || Jun 23 || 7 megaseconds || 81.02 days || 7,000,000 seconds
|-
| 81 || Jun 24 || e lunar months || 80.27 days || A lunar month ≈ 29.53059 days, e ≈ 2.718
|-
| 80 || Jun 25 || 60 rotations of Foucault's pendulum in Paris || 79.67 days || '''{{w|Paris}}''' is the capital city of '''{{w|France}}''' and it's located at a latitude of 48º 51' 23" N. '''{{w|Foucault's pendulum}}''' is a device conceived by French physicist '''{{w|Léon Foucault}}''', consisting of a pendulum that is free to rotate its plane of oscillation. When placed in a rotating '''{{w|Non-inertial reference frame}}''' such as the '''{{w|Earth}}''', that has an associated rotation period of 24 hours, the oscillation plane of Foucault's pendulum rotates at a rate determined by the Earth's period and the angle between the rotation axis of the frame of reference and the direction of its elongation in resting position, i.e. its latitude, with a period T = T🜨/sin(λ), being T🜨 Earth's period and λ the latitude of the pendulum. Historically, Léon Foucault performed this experiment in the city of Paris, most famously (although not for the first time, which happened at the '''{{w|Paris Observatory}}''') under the dome of the '''{{w|Panthéon}}''', to demonstrate Earth's rotation. At this latitude, Foucault's pendulum completes a full rotation every 31.8 hours.
|-
| 79 || Jun 26 || 8 milligenerations || 78.89 days || A generation is in general 22-33 years, with a reasonable mid-point of 27; and 8 x 0.001 (milli) x 365.2425 (accounting for leap years) x 27 ≈ 78.89 days
|-
| 78 || Jun 27 || 777,777 dog minutes || 77.16 days || A popular myth is that dogs age 7 times faster than humans, so 1 dog minute equals 1/7 human minutes.
|-
| 77 || Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads) || 77+ days || 7! = 7x6x5x4x3x2x1 = 5040. The standard episode of ''Jeopardy'' is 22-26 minutes, skipping ads. At 22 minutes each, the total is 110880 minutes, or exactly 77 days.
|-
| 76 || Jun 29 || 5,000 repeats of ''99 Bottles of Beer'' || 76.39 days || Each verse of {{w|99 Bottles of Beer}} is "''N'' bottles of beer on the wall, ''N'' bottles of beer. Take one down, pass it around, ''N-1'' bottles of beer on the wall." The entire song contains 99 verses. Randall apparently sings this rather slowly at around 72 bpm, taking about 13 seconds per verse.
|-
| 75 || Jun 30 || 5 baker's fortnights || 75 days || A {{w|baker's dozen}} is a dozen (12) plus 1 extra item. Randall has generalized this to adding 1 to any unit. A fortnight is 2 weeks, so a baker's fortnight is 15 days. 5x15 is 75 days.
|-
| 74 || Jul 1 || √2 dog years || 73.79 days || See day 78 (Jun 27)
|-
| 73 || Jul 2 || π millivics (1/1000th of Queen Victoria's reign) || 72.97 days || {{w|Queen Victoria}} ruled between 20 June 1837 and 22 January 1901 (23,226 days).
|-
| 72 || Jul 3 || 42 drives from NYC to LA (Google Maps estimate) || 71.75 days || According to Google Maps, the drive from New York City to Los Angeles via I-80 W (2789 miles or 4489 km) takes 41 hours.
|-
| 71 || Jul 4 || 1,000 viewings of ''Groundhog Day''|| 70.14 days || Using {{w|Groundhog Day (film)|Groundhog Day's}} 101-minute run time.
|-
| 70 || Jul 5 || 100,000 minutes || 69.44 days ||
|-
| 69 || Jul 6 || 1/10th of Martian year || 68.70 Earth days || Martian sidereal and tropical years both round to 687.0 Earth days
|-
| 68 || Jul 7 || 1,234,567 sound-miles || 67.63 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 67.6349058 days.
|-
| 67 || Jul 8 || 2πe seconds || 66.74 days || 2^(π^e) = 5,766,073 seconds
|-
| 66 || Jul 9 || 216 beats (Swatch Internet Time) || 65.54 days || A "{{w|.beat}}" is equal to 1/1000 day.
|-
| 65 || Jul 10 || 1,000 ISS orbits || 64.58 days || Each orbit of the ISS takes 90-93 minutes. Here a value of 93 minutes is used.
|-
| 64 || Jul 11 || Five hundred twenty five thousand (base seven) minutes|| 62.88 days || This refers to {{w|radix}}-7 arithmetic: 525,0007 minutes = 90,55210 minutes. Also references the opening and recurring line "Five hundred twenty five thousand six hundred minutes" from {{w|Seasons of Love}}, a song from the musical {{w|Rent (musical)|''Rent''}}, which is also referenced in [[1047: Approximations]]. "base seven" has the same rhythm as "six hundred".
|-
| 63 || Jul 12 || 1050 Planck times || 62.38 days || 10^50 x 5.39 x 10^-44 seconds
|-
| 62 || Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)|| 62.50 days || {{w|The Office (British TV series)|''The Office''}} was originally a {{w|BBC}} television show which had no commercial breaks, but Randall is obviously more familiar with the {{w|The Office (American TV series)|US version}}. This US "half-hour" comedy format contains 22.5 minutes of content (including the title sequence) and 7.5 minutes of ads. 
|-
| 61 || Jul 14 || Four score and seven kilominutes || 60.42 days || 87 x 1000 minutes
|-
| 60 || Jul 15 || 2 lunar months || 59.06 days || There are a number of different ways to define the {{w|lunar month}}. The most common is the synodic month, because it relates to the phases of the moon, and it's approximately 29.53 days.
|-
| 59 || Jul 16 || Half a day on Venus || 58.38 Earth days || A Venus synodic day is 116 days 18 hours.
|-
| 58 || Jul 17 || 5 megaseconds || 57.87 days || 5,000,000 seconds
|-
| 57 || Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature) || 57.21 days || 5222 years × 30 × 10-6. 3200 BCE is the approximate date of pre-Sumerian proto-writing as given in {{w|History of writing|Wikipedia's article on the history of writing}}.
|-
| 56 || Jul 19 || 1,000 viewings of ''Run Lola Run'' || 55.57 days || Using {{w|Run Lola Run|the movie's}} run time of 80 minutes.
|-
| 55 || Jul 20 || One million sound-miles || 54.78 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 54.7843137 days.
|-
| 54 || Jul 21 || 30 Ionian months || 53.07 days || Orbital period of Io around Jupiter is approximately 1.77 days.
|-
| 53 || Jul 22 || One dog year || 52.18 days || See day 78 (Jun 27)
|-
| 52 || Jul 23 || 60 viewings of ''Star Wars Episodes I-IX'' || 51.75 days || According to [https://dorksideoftheforce.com/2021/05/04/how-long-to-watch-every-star-wars-movie/ Fansided] the combined running times are 20 hours 42 minutes.
|-
| 51 || Jul 24 || 1/100,000,000,000th of the universe's age || 50.40 days || The universe is estimated to be about 13.8 billion years old.
|-
| 50 || Jul 25 || 5 milli-generations || 49.3 days || See day 79 (Jun 26)
|-
| 49 || Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven'' || 48.61 days || {{w|Seven minutes in heaven}} is an Anglo-culture teenager game, occuring in several movies. 10,000 minutes in Heaven is almost a week of making out (or doing whatever in a broom closet), so this game is unlikely.
|-
| 48 || Jul 27 || φeπ minutes || 47.62 days || 68,567.57 minutes
|-
| 47 || Jul 28 || 4 megaseconds || 46.30 days || 4,000,000 seconds
|-
| 46 || Jul 29 || 216 minutes || 45.51 days || 65,536 minutes
|-
| 45 || Jul 30 || eee seconds || 44.15 days || 3,814,279.10 seconds
|-
| 44 || Jul 31 || π fortnights|| 43.98 days || 3.14159 x 14 days
|-
| 43 || Aug 1 || One devil's spacewalk (666 orbits of the ISS) || 43.01 days || See day 65 (Jul 10). 666 is the {{w|number of the beast}}.
|-
| 42 || Aug 2 || 1 kilowatt-hour per watt || 41.66 days || 1000 hours
|-
| 41 || Aug 3 || eπ Ionian months || 40.94 days || Orbital period of Io around Jupiter is 1.769137786 days
|-
| 40 || Aug 4 || 30 rotations of Foucault's pendulum in Paris || 39.84 days || Refer to Day 80 (Jun 25)
|-
| 39 || Aug 5 || e fortnights || 38.06 days ||2.71828 x 14 days
|-
| 38 || Aug 6 || πe baker's days (25 hours) || 37.98 days || See day 75 (Jun 30)
|-
| 37 || Aug 7 || One deciyear || 36.52 days || One tenth of one year
|-
| 36 || Aug 8 || 7! milliweeks || 35.28 days || 5040 × 0.001 weeks
|-
| 35 || Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music || 34.72 days || ''Think'' is the music played while the contestants try to answer the Final Jeopardy question; it is 30 seconds long.
|-
| 34 || Aug 10 || 1000 basketball games (game time) || 33.33 days || Uses the NBA game time of four 12-minute quarters, or 48 minutes
|-
| 33 || Aug 11 || 777 hours || 32.38 days ||
|-
| 32 || Aug 12 || One millilincoln (1/1000 of fourscore and seven years) || 31.78 days || {{w|Abraham Lincoln}}'s {{w|Gettysburg Address}} begins with the famous phrase "Four score and seven years ago". 1 score = twenty. 
|-
| 31 || Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads) || 31.25 days || Uses a television 'hour' containing 45 minutes of content and 15 minutes of ads
|-
| 30 || Aug 14 || All of ''Star Trek'', consecutively || 27.16* days || As per [https://redshirtsalwaysdie.com/2021/01/22/take-far-longer-watch-star-trek-think/ RedShirtsAlwaysDie.com] of January 22, 2021. *Note well: dozens of additional ''Star Trek'' franchise episodes have been produced since, and more are presently scheduled to be released through June, July, and August, so this value is somewhat indeterminate over the scope of the countdown.
|-
| 29 || Aug 15 || 777,777 nanocenturies || 28.41 days || 777,777 × 10-9 × 100 years
|-
| 28 || Aug 16 || One sidereal lunar month || 27.3 days || The time it takes moon to return to the same position relative to the fixed stars
|-
| 27 || Aug 17 || 6 dog months || 26.1 days || See day 78 (Jun 27)
|-
| 26 || Aug 18 || ππ kilominutes || 25.32 days || 36,462.16 minutes
|-
| 25 || Aug 19 || 7 games of 7! minutes in Heaven || 24.5 days || 7 x 5040 (7 {{w|Factorial}}) minutes. See also day 49 (Jul 26).
|-
| 24 || Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy || 23.82 days || ''The Fellowship of the Ring'' extended version is 208 minutes, ''The Two Towers'' is 226 minutes, and ''The Return of the King'' is 252 minutes for its e.v., according to [https://fictionhorizon.com/how-long-are-all-the-lord-of-the-rings-and-the-hobbit-movies-combined/ FictionHorizon.com]
|-
| 23 || Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times || 22.21 days || See day 72 (Jul 3). This is for 6 round-trips and 1 one-way trip.
|-
| 22 || Aug 22 || ''It's a Small World'' sung at 1/10,000th speed || 21.18 days || {{w|It's a Small World}} is a song that was composed for the attraction of the same name at various {{w|Disney}} theme parks, and plays continuously at them in various languages.
|-
| 21 || Aug 23 || 500 hours || 20.83 days ||
|-
| 20 || Aug 24 || √2 fortnights || 19.80 days || 1.4142 × 14 days
|-
| 19 || Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles || 18.94 days || {{w|Vanessa Carlton}} is an American singer, and {{w|A Thousand Miles}} is her most successful song. Randall estimates her walking speed at about 2.2 miles/hour.
|-
| 18 || Aug 26 || 100,000 breaths || 15 seconds per breath for 17 days || Normal respiratory rate for adults is typically 12-20 breaths per minute, or about 3-4 seconds each. Randall may be a practitioner of "[https://www.frontiersin.org/articles/10.3389/fnhum.2018.00353/full slow breathing.]"
|-
| 17 || Aug 27 || √2 megaseconds || 16.37 days || 1.4142 × 1,000,000 seconds
|-
| 16 || Aug 28 || πππ πcoseconds || 15.51 days || 1.3402 × 1018 picoseconds (i.e., 10-12 seconds), making a joke how the mathematical "pi" is written with the character "π"
|-
| 15 || Aug 29 || One baker's fortnight (15 days) || 15 days || See day 75 (Jun 30)
|-
| 14 || Aug 30 || One baker's dozen (13) baker's days (25 hours) || 13.54 days || 325 hours; see day 75 (Jun 30)
|-
| 13 || Aug 31 || 300 hours || 12.5 days ||
|-
| 12 || Sep 1 || One million seconds || 11.57 days ||
|-
| 11 || Sep 2 || One nonstop bike ride from NYC to LA || 10.54 days || Google maps estimates the trip at 253 hours
|-
| 10 || Sep 3 || 1⁄1,000th of a generation || 9.86 days || See day 79 (Jun 26)
|-
| 9 || Sep 4 || 777,777 seconds || 9.002 days ||
|-
| 8 || Sep 5 || 100 viewings of ''Groundhog Day'' || 7.01 days || See Day 71 (Jul 4).
|-
| 7 || Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven) || 6.04 days || 8,700 minutes
|-
| 6 || Sep 7 || One pico-universe-lifetime || 5.04 days || See Day 51 (Jul 24)
|-
| 5 || Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks || 4.63 days || The chorus lasts about 8 seconds per 'person'
|-
| 4 || Sep 9 || One centiyear || 3.65 days || 365.24 days/100
|-
| 3 || Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times || 2.79 days || Based on a length of 4 minutes, 1 second
|-
| 2 || Sep 11 || ''Speed'' (1994) played at one frame per second || 1.9 days || {{w|Speed (1994 film)}} has runtime of 116 minutes = 6,960 seconds = 167,040 film frames at standard frame rate of 24 frames/second
|-
| 1 || Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1) || 0.76 days || Each iteration contains ''N'' verses. ''N + N-1 + N-2 ... + 1'' equals ''N * (N+1) / 2'', so 99 recursions = 4950 verses. Using the same 13-second (72 bpm) rate as Jun 29, this is close to 18 hours. Probably refers to Donald Knuth's article {{w|The Complexity of Songs}}.
|-
| 0 || Sep 13 || ''What If? 2'' release day || N/A ||
|}

The title text refers to the recursive time period on Sep 12. If you don't stop when you reach N=0 bottles, the repetition never ends, so that time interval becomes infinite. He likens it to {{w|The Song That Never Ends}}, another repetitive children's song, which is specifically intended to go on forever. The difference is that the Beer song has a natural stopping point at 0, while ''The Song That Never Ends'' is completely repetitive.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

Large heading: Countdown to ''What if? 2''

Subheading: (Preorder at [https://xkcd.com/whatif2 xkcd.com/whatif2] to get it at the end of the countdown)

Remainder of comic is a calendar with the date in one corner of each day's box.

{| class="wikitable"
|-
! Date !! Description
|-
| Jun 22 || πe millidecades
|-
| Jun 23 || 7 megaseconds
|-
| Jun 24 || e lunar months
|-
| Jun 25 || 60 rotations of Foucault's pendulum in Paris
|-
| Jun 26 || 8 milligenerations
|-
| Jun 27 || 777,777 dog minutes
|-
| Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads)
|-
| Jun 29 || 5,000 repeats of ''99 Bottles of Beer''
|-
| Jun 30 || 5 baker's fortnights (15 days)
|-
| Jul 1 || √2 dog years
|-
| Jul 2 || π millivics (1/1000th of Queen Victoria's reign)
|-
| Jul 3 || 42 drives from NYC to LA (Google Maps estimate)
|-
| Jul 4 || 1,000 viewings of ''Groundhog Day''
|-
| Jul 5 || 100,000 minutes
|-
| Jul 6 || 1/10th of Martian year
|-
| Jul 7 || 1,234,567 sound-miles
|-
| Jul 8 || 2πe seconds
|-
| Jul 9 || 216 beats (Swatch Internet Time)
|-
| Jul 10 || 1,000 ISS orbits
|-
| Jul 11 || Five hundred twenty five thousand (base seven) minutes (text preceded by several drawn musical notes)
|-
| Jul 12 || 1050 Planck times
|-
| Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)
|-
| Jul 14 || Four score and seven kilominutes
|-
| Jul 15 || 2 lunar months
|-
| Jul 16 || Half a day on Venus
|-
| Jul 17 || 5 megaseconds
|-
| Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature)
|-
| Jul 19 || 1,000 viewings of ''Run Lola Run''
|-
| Jul 20 || One million sound-miles
|-
| Jul 21 || 30 Ionian months
|-
| Jul 22 || One dog year
|-
| Jul 23 || 60 viewings of ''Star Wars Episodes I-IX''
|-
| Jul 24 || 1/100,000,000,000th of the universe's age
|-
| Jul 25 || 5 milli-generations
|-
| Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven''
|-
| Jul 27 || φeπ minutes
|-
| Jul 28 || 4 megaseconds
|-
| Jul 29 || 216 minutes
|-
| Jul 30 || eee seconds
|-
| Jul 31 || π fortnights
|-
| Aug 1 || one devil's spacewalk (666 orbits of the ISS)
|-
| Aug 2 || 1 kilowatt-hour per watt
|-
| Aug 3 || eπ Ionian months
|-
| Aug 4 || 30 rotations of Foucault's pendulum in Paris
|-
| Aug 5 || e fortnights
|-
| Aug 6 || πe baker's days (25 hours)
|-
| Aug 7 || one deciyear
|-
| Aug 8 || 7! milliweeks
|-
| Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music
|-
| Aug 10 || 1000 basketball games (game time)
|-
| Aug 11 || 777 hours
|-
| Aug 12 || one millilincoln (1/1000 of fourscore and seven years)
|-
| Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads)
|-
| Aug 14 || All of ''Star Trek'', consecutively
|-
| Aug 15 || 777,777 nanocenturies
|-
| Aug 16 || one sidereal lunar month
|-
| Aug 17 || 6 dog months
|-
| Aug 18 || ππ kilominutes
|-
| Aug 19 || 7 games of ''7! minutes in Heaven''
|-
| Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy
|-
| Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times
|-
| Aug 22 || ''It's a Small World'' sung at 1/10,000th speed
|-
| Aug 23 || 500 hours
|-
| Aug 24 || √2 fortnights
|-
| Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles
|-
| Aug 26 || 100,000 breaths
|-
| Aug 27 || √2 megaseconds
|-
| Aug 28 || πππ πcoseconds
|-
| Aug 29 || One baker's fortnight (15 days)
|-
| Aug 30 || One baker's dozen (13) baker's days (25 hours)
|-
| Aug 31 || 300 hours
|-
| Sep 1 || One million seconds
|-
| Sep 2 || One nonstop bike ride from NYC to LA
|-
| Sep 3 || 1⁄1,000th of a generation
|-
| Sep 4 || 777,777 seconds
|-
| Sep 5 || 100 viewings of ''Groundhog Day''
|-
| Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven)
|-
| Sep 7 || One pico-universe-lifetime
|-
| Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks
|-
| Sep 9 || One centiyear
|-
| Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times
|-
| Sep 11 || ''Speed'' (1994) played at one frame per second
|-
| Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1)
|-
| Sep 13 || ''What If? 2'' release day
|}
{{comic discussion}}
[[Category:Book promotion]]
[[Category:Comics featuring real people]]
[[Category:Songs]]
[[Category:Animals]]

2636: What If? 2 Countdown

2022-06-24T20:31:32Z

162.158.166.183: /* Explanation */ show some love to the preorder link

{{comic
| number = 2636
| date = June 22, 2022
| title = What If? 2 Countdown
| image = what_if_2_countdown.png
| titletext = If you don't end the 99 Bottles of Beer recursion at N=0 it just becomes The Other Song That Never Ends.
}}

==Explanation==
{{incomplete|Created by FOUR SCORE AND 7 BOTTLES OF BEER ON THE WALL - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
This comic takes the idea of {{w|Advent calendar}}s, and takes it to the extreme. It uses rather absurd and/or obscure ways to measure the amount of time until [[Randall]]'s new book [https://xkcd.com/whatif2 ''What if? 2''] is released, with esoteric units or esoteric numbers. And often both.

Some concepts that appear several times throughout the calendar are:

* '''{{w|SI prefixes}}''', which can be applied to the beginning of a unit's name to multiply or divide the unit by powers of 10 or 1,000. This is standard for units like meters and grams, but is rarely applied to measurements of time other than when a unit of less than one second is needed, most commonly in various fields of science and engineering such as physics and electronics.
* The '''{{w|Gettysburg Address}}''', a famous speech delivered by U.S. president Abraham Lincoln in 1863, where he began by referring to the signing of the Declaration of Independence taking place "four score and seven years ago". A score is a dated term for the number 20, so "four score and seven" is equivalent to 87.
* A '''dog year''' is traditionally considered to be one-seventh the length of a normal human year, since a dog's overall lifespan is roughly one-seventh of a typical human's. The comic applies this to other units of time, such as minutes and months, each of which is also one-seventh the length of the standard unit. The number 7 (traditionally a "lucky number") is also used in many of the numbers quoted in the calendar.
* Other comparative durations of time that are not normally or usefully applied to day-length multiples. At the top end, there is the age of the universe, at the other there is {{w|Planck units#Planck time|Planck-time}} – with entire durations of periods of human history and the time needed to watch popular TV/film franchises in-between – most of which require a non-trivial multiplier or divisor to bring them to the necessary scale required.
* A '''{{w|baker's dozen}}''' is 13, or one more than a normal dozen. Here, the "baker's" prefix can be applied to any unit by adding an extra one of its constituent parts, like an extra hour added to a day.
* '''{{w|Irrational numbers}}''' like {{w|pi}} (3.14159...), {{w|Euler's number}} or ''e'' (2.71828...), the {{w|golden ratio}} (1.61803...), and the {{w|square root of 2}} (1.41421...). These are all interesting numbers because of their mathematical properties, but very impractical to use as arbitrary measurements of time because they have an endless series of non-repeating decimal digits.
* The teenage dating game '''{{w|Seven minutes in heaven}}'''.
* Rotation and revolution periods of various planets and moons in the Solar System.

{| class="wikitable"
|-
! Days left !! Date !! Duration specified !! Duration in days !! Explanation
|-
| 83 || Jun 22 || πe millidecades || 82.03 days || π ≈ 3.14159, e ≈ 2.718, so πe is about 22.459. A millidecade is 1/1000 decade, or 1/100 year, or 3.652425 days. Multiplying these results in 82.03 days. This is a play on {{w|Euler's identity}}, eiπ=-1, but raising pi to the power of e instead.
|-
| 82 || Jun 23 || 7 megaseconds || 81.02 days || 7,000,000 seconds
|-
| 81 || Jun 24 || e lunar months || 80.27 days || A lunar month ≈ 29.53059 days, e ≈ 2.718
|-
| 80 || Jun 25 || 60 rotations of Foucault's pendulum in Paris || 79.67 days || '''{{w|Paris}}''' is the capital city of '''{{w|France}}''' and it's located at a latitude of 48º 51' 23" N. '''{{w|Foucault's pendulum}}''' is a device conceived by French physicist '''{{w|Léon Foucault}}''', consisting of a pendulum that is free to rotate its plane of oscillation. When placed in a rotating '''{{w|Non-inertial reference frame}}''' such as the '''{{w|Earth}}''', that has an associated rotation period of 24 hours, the oscillation plane of Foucault's pendulum rotates at a rate determined by the Earth's period and the angle between the rotation axis of the frame of reference and the direction of its elongation in resting position, i.e. its latitude, with a period T = T🜨/sin(λ), being T🜨 Earth's period and λ the latitude of the pendulum. Historically, Léon Foucault performed this experiment in the city of Paris, most famously (although not for the first time, which happened at the '''{{w|Paris Observatory}}''') under the dome of the '''{{w|Panthéon}}''', to demonstrate Earth's rotation. At this latitude, Foucault's pendulum completes a full rotation every 31.8 hours.
|-
| 79 || Jun 26 || 8 milligenerations || 78.89 days || A generation is in general 22-33 years, with a reasonable mid-point of 27; and 8 x 0.001 (milli) x 365.2425 (accounting for leap years) x 27 ≈ 78.89 days
|-
| 78 || Jun 27 || 777,777 dog minutes || 77.16 days || A popular myth is that dogs age 7 times faster than humans, so 1 dog minute equals 1/7 human minutes.
|-
| 77 || Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads) || 77+ days || 7! = 7x6x5x4x3x2x1 = 5040. The standard episode of ''Jeopardy'' is 22-26 minutes, skipping ads. At 22 minutes each, the total is 110880 minutes, or exactly 77 days.
|-
| 76 || Jun 29 || 5,000 repeats of ''99 Bottles of Beer'' || 76.39 days || Each verse of {{w|99 Bottles of Beer}} is "''N'' bottles of beer on the wall, ''N'' bottles of beer. Take one down, pass it around, ''N-1'' bottles of beer on the wall." The entire song contains 99 verses. Randall apparently sings this rather slowly at around 72 bpm, taking about 13 seconds per verse.
|-
| 75 || Jun 30 || 5 baker's fortnights || 75 days || A {{w|baker's dozen}} is a dozen (12) plus 1 extra item. Randall has generalized this to adding 1 to any unit. A fortnight is 2 weeks, so a baker's fortnight is 15 days. 5x15 is 75 days.
|-
| 74 || Jul 1 || √2 dog years || 73.79 days || See day 78 (Jun 27)
|-
| 73 || Jul 2 || π millivics (1/1000th of Queen Victoria's reign) || 72.97 days || {{w|Queen Victoria}} ruled between 20 June 1837 and 22 January 1901 (23,226 days).
|-
| 72 || Jul 3 || 42 drives from NYC to LA (Google Maps estimate) || 71.75 days || According to Google Maps, the drive from New York City to Los Angeles via I-80 W (2789 miles or 4489 km) takes 41 hours.
|-
| 71 || Jul 4 || 1,000 viewings of ''Groundhog Day''|| 70.14 days || Using {{w|Groundhog Day (film)|Groundhog Day's}} 101-minute run time.
|-
| 70 || Jul 5 || 100,000 minutes || 69.44 days ||
|-
| 69 || Jul 6 || 1/10th of Martian year || 68.70 Earth days || Martian sidereal and tropical years both round to 687.0 Earth days
|-
| 68 || Jul 7 || 1,234,567 sound-miles || 67.63 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 67.6349058 days.
|-
| 67 || Jul 8 || 2πe seconds || 66.74 days || 2^(π^e) = 5,766,073 seconds
|-
| 66 || Jul 9 || 216 beats (Swatch Internet Time) || 65.54 days || A "{{w|.beat}}" is equal to 1/1000 day.
|-
| 65 || Jul 10 || 1,000 ISS orbits || 64.58 days || Each orbit of the ISS takes 90-93 minutes. Here a value of 93 minutes is used.
|-
| 64 || Jul 11 || Five hundred twenty five thousand (base seven) minutes|| 62.88 days || This refers to {{w|radix}}-7 arithmetic: 525,0007 minutes = 90,55210 minutes. Also references the opening and recurring line "Five hundred twenty five thousand six hundred minutes" from {{w|Seasons of Love}}, a song from the musical {{w|Rent (musical)|''Rent''}}, which is also referenced in [[1047: Approximations]]. "base seven" has the same rhythm as "six hundred".
|-
| 63 || Jul 12 || 1050 Planck times || 62.38 days || 10^50 x 5.39 x 10^-44 seconds
|-
| 62 || Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)|| 62.50 days || {{w|The Office (British TV series)|''The Office''}} was originally a {{w|BBC}} television show which had no commercial breaks, but Randall is obviously more familiar with the {{w|The Office (American TV series)|US version}}. This US "half-hour" comedy format contains 22.5 minutes of content (including the title sequence) and 7.5 minutes of ads. 
|-
| 61 || Jul 14 || Four score and seven kilominutes || 60.42 days || 87 x 1000 minutes
|-
| 60 || Jul 15 || 2 lunar months || 59.06 days || There are a number of different ways to define the {{w|lunar month}}. The most common is the synodic month, because it relates to the phases of the moon, and it's approximately 29.53 days.
|-
| 59 || Jul 16 || Half a day on Venus || 58.38 Earth days || A Venus synodic day is 116 days 18 hours.
|-
| 58 || Jul 17 || 5 megaseconds || 57.87 days || 5,000,000 seconds
|-
| 57 || Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature) || 57.21 days || 5222 years × 30 × 10-6. The 3200 BCE date is the approximate advent of pre-Sumerian proto-writing as given in {{w|History of writing|Wikipedia's article on the history of writing}}.
|-
| 56 || Jul 19 || 1,000 viewings of ''Run Lola Run'' || 55.57 days || Using {{w|Run Lola Run|the movie's}} run time of 80 minutes.
|-
| 55 || Jul 20 || One million sound-miles || 54.78 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 54.7843137 days.
|-
| 54 || Jul 21 || 30 Ionian months || 53.07 days || Orbital period of Io around Jupiter is approximately 1.77 days.
|-
| 53 || Jul 22 || One dog year || 52.18 days || See day 78 (Jun 27)
|-
| 52 || Jul 23 || 60 viewings of ''Star Wars Episodes I-IX'' || 51.75 days || According to [https://dorksideoftheforce.com/2021/05/04/how-long-to-watch-every-star-wars-movie/ Fansided] the combined running times are 20 hours 42 minutes.
|-
| 51 || Jul 24 || 1/100,000,000,000th of the universe's age || 50.40 days || The universe is estimated to be about 13.8 billion years old.
|-
| 50 || Jul 25 || 5 milli-generations || 49.3 days || See day 79 (Jun 26)
|-
| 49 || Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven'' || 48.61 days || {{w|Seven minutes in heaven}} is an Anglo-culture teenager game, occuring in several movies. 10,000 minutes in Heaven is almost a week of making out (or doing whatever in a broom closet), so this game is unlikely.
|-
| 48 || Jul 27 || φeπ minutes || 47.62 days || 68,567.57 minutes
|-
| 47 || Jul 28 || 4 megaseconds || 46.30 days || 4,000,000 seconds
|-
| 46 || Jul 29 || 216 minutes || 45.51 days || 65,536 minutes
|-
| 45 || Jul 30 || eee seconds || 44.15 days || 3,814,279.10 seconds
|-
| 44 || Jul 31 || π fortnights|| 43.98 days || 3.14159 x 14 days
|-
| 43 || Aug 1 || One devil's spacewalk (666 orbits of the ISS) || 43.01 days || See day 65 (Jul 10). 666 is the {{w|number of the beast}}.
|-
| 42 || Aug 2 || 1 kilowatt-hour per watt || 41.66 days || 1000 hours
|-
| 41 || Aug 3 || eπ Ionian months || 40.94 days || Orbital period of Io around Jupiter is 1.769137786 days
|-
| 40 || Aug 4 || 30 rotations of Foucault's pendulum in Paris || 39.84 days || Refer to Day 80 (Jun 25)
|-
| 39 || Aug 5 || e fortnights || 38.06 days ||2.71828 x 14 days
|-
| 38 || Aug 6 || πe baker's days (25 hours) || 37.98 days || See day 75 (Jun 30)
|-
| 37 || Aug 7 || One deciyear || 36.52 days || One tenth of one year
|-
| 36 || Aug 8 || 7! milliweeks || 35.28 days || 5040 × 0.001 weeks
|-
| 35 || Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music || 34.72 days || ''Think'' is the music played while the contestants try to answer the Final Jeopardy question; it is 30 seconds long.
|-
| 34 || Aug 10 || 1000 basketball games (game time) || 33.33 days || Uses the NBA game time of four 12-minute quarters, or 48 minutes
|-
| 33 || Aug 11 || 777 hours || 32.38 days ||
|-
| 32 || Aug 12 || One millilincoln (1/1000 of fourscore and seven years) || 31.78 days || {{w|Abraham Lincoln}}'s {{w|Gettysburg Address}} begins with the famous phrase "Four score and seven years ago". 1 score = twenty. 
|-
| 31 || Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads) || 31.25 days || Uses a television 'hour' containing 45 minutes of content and 15 minutes of ads
|-
| 30 || Aug 14 || All of ''Star Trek'', consecutively || 27.16* days || As per [https://redshirtsalwaysdie.com/2021/01/22/take-far-longer-watch-star-trek-think/ RedShirtsAlwaysDie.com] of January 22, 2021. *Note well: dozens of additional ''Star Trek'' franchise episodes have been produced since, and more are presently scheduled to be released through June, July, and August, so this value is somewhat indeterminate over the scope of the countdown.
|-
| 29 || Aug 15 || 777,777 nanocenturies || 28.41 days || 777,777 × 10-9 × 100 years
|-
| 28 || Aug 16 || One sidereal lunar month || 27.3 days || The time it takes moon to return to the same position relative to the fixed stars
|-
| 27 || Aug 17 || 6 dog months || 26.1 days || See day 78 (Jun 27)
|-
| 26 || Aug 18 || ππ kilominutes || 25.32 days || 36,462.16 minutes
|-
| 25 || Aug 19 || 7 games of 7! minutes in Heaven || 24.5 days || 7 x 5040 (7 {{w|Factorial}}) minutes. See also day 49 (Jul 26).
|-
| 24 || Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy || 23.82 days || ''The Fellowship of the Ring'' extended version is 208 minutes, ''The Two Towers'' is 226 minutes, and ''The Return of the King'' is 252 minutes for its e.v., according to [https://fictionhorizon.com/how-long-are-all-the-lord-of-the-rings-and-the-hobbit-movies-combined/ FictionHorizon.com]
|-
| 23 || Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times || 22.21 days || See day 72 (Jul 3). This is for 6 round-trips and 1 one-way trip.
|-
| 22 || Aug 22 || ''It's a Small World'' sung at 1/10,000th speed || 21.18 days || {{w|It's a Small World}} is a song that was composed for the attraction of the same name at various {{w|Disney}} theme parks, and plays continuously at them in various languages.
|-
| 21 || Aug 23 || 500 hours || 20.83 days ||
|-
| 20 || Aug 24 || √2 fortnights || 19.80 days || 1.4142 × 14 days
|-
| 19 || Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles || 18.94 days || {{w|Vanessa Carlton}} is an American singer, and {{w|A Thousand Miles}} is her most successful song. Randall estimates her walking speed at about 2.2 miles/hour.
|-
| 18 || Aug 26 || 100,000 breaths || 15 seconds per breath for 17 days || Normal respiratory rate for adults is typically 12-20 breaths per minute, or about 3-4 seconds each. Randall may be a practitioner of "[https://www.frontiersin.org/articles/10.3389/fnhum.2018.00353/full slow breathing.]"
|-
| 17 || Aug 27 || √2 megaseconds || 16.37 days || 1.4142 × 1,000,000 seconds
|-
| 16 || Aug 28 || πππ πcoseconds || 15.51 days || 1.3402 × 1018 picoseconds (i.e., 10-12 seconds), making a joke how the mathematical "pi" is written with the character "π"
|-
| 15 || Aug 29 || One baker's fortnight (15 days) || 15 days || See day 75 (Jun 30)
|-
| 14 || Aug 30 || One baker's dozen (13) baker's days (25 hours) || 13.54 days || 325 hours; see day 75 (Jun 30)
|-
| 13 || Aug 31 || 300 hours || 12.5 days ||
|-
| 12 || Sep 1 || One million seconds || 11.57 days ||
|-
| 11 || Sep 2 || One nonstop bike ride from NYC to LA || 10.54 days || Google maps estimates the trip at 253 hours
|-
| 10 || Sep 3 || 1⁄1,000th of a generation || 9.86 days || See day 79 (Jun 26)
|-
| 9 || Sep 4 || 777,777 seconds || 9.002 days ||
|-
| 8 || Sep 5 || 100 viewings of ''Groundhog Day'' || 7.01 days || See Day 71 (Jul 4).
|-
| 7 || Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven) || 6.04 days || 8,700 minutes
|-
| 6 || Sep 7 || One pico-universe-lifetime || 5.04 days || See Day 51 (Jul 24)
|-
| 5 || Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks || 4.63 days || The chorus lasts about 8 seconds per 'person'
|-
| 4 || Sep 9 || One centiyear || 3.65 days || 365.24 days/100
|-
| 3 || Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times || 2.79 days || Based on a length of 4 minutes, 1 second
|-
| 2 || Sep 11 || ''Speed'' (1994) played at one frame per second || 1.9 days || {{w|Speed (1994 film)}} has runtime of 116 minutes = 6,960 seconds = 167,040 film frames at standard frame rate of 24 frames/second
|-
| 1 || Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1) || 0.76 days || Each iteration contains ''N'' verses. ''N + N-1 + N-2 ... + 1'' equals ''N * (N+1) / 2'', so 99 recursions = 4950 verses. Using the same 13-second (72 bpm) rate as Jun 29, this is close to 18 hours. Probably refers to Donald Knuth's article {{w|The Complexity of Songs}}.
|-
| 0 || Sep 13 || ''What If? 2'' release day || N/A ||
|}

The title text refers to the recursive time period on Sep 12. If you don't stop when you reach N=0 bottles, the repetition never ends, so that time interval becomes infinite. He likens it to {{w|The Song That Never Ends}}, another repetitive children's song, which is specifically intended to go on forever. The difference is that the Beer song has a natural stopping point at 0, while ''The Song That Never Ends'' is completely repetitive.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

Large heading: Countdown to ''What if? 2''

Subheading: (Preorder at [https://xkcd.com/whatif2 xkcd.com/whatif2] to get it at the end of the countdown)

Remainder of comic is a calendar with the date in one corner of each day's box.

{| class="wikitable"
|-
! Date !! Description
|-
| Jun 22 || πe millidecades
|-
| Jun 23 || 7 megaseconds
|-
| Jun 24 || e lunar months
|-
| Jun 25 || 60 rotations of Foucault's pendulum in Paris
|-
| Jun 26 || 8 milligenerations
|-
| Jun 27 || 777,777 dog minutes
|-
| Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads)
|-
| Jun 29 || 5,000 repeats of ''99 Bottles of Beer''
|-
| Jun 30 || 5 baker's fortnights (15 days)
|-
| Jul 1 || √2 dog years
|-
| Jul 2 || π millivics (1/1000th of Queen Victoria's reign)
|-
| Jul 3 || 42 drives from NYC to LA (Google Maps estimate)
|-
| Jul 4 || 1,000 viewings of ''Groundhog Day''
|-
| Jul 5 || 100,000 minutes
|-
| Jul 6 || 1/10th of Martian year
|-
| Jul 7 || 1,234,567 sound-miles
|-
| Jul 8 || 2πe seconds
|-
| Jul 9 || 216 beats (Swatch Internet Time)
|-
| Jul 10 || 1,000 ISS orbits
|-
| Jul 11 || Five hundred twenty five thousand (base seven) minutes (text preceded by several drawn musical notes)
|-
| Jul 12 || 1050 Planck times
|-
| Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)
|-
| Jul 14 || Four score and seven kilominutes
|-
| Jul 15 || 2 lunar months
|-
| Jul 16 || Half a day on Venus
|-
| Jul 17 || 5 megaseconds
|-
| Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature)
|-
| Jul 19 || 1,000 viewings of ''Run Lola Run''
|-
| Jul 20 || One million sound-miles
|-
| Jul 21 || 30 Ionian months
|-
| Jul 22 || One dog year
|-
| Jul 23 || 60 viewings of ''Star Wars Episodes I-IX''
|-
| Jul 24 || 1/100,000,000,000th of the universe's age
|-
| Jul 25 || 5 milli-generations
|-
| Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven''
|-
| Jul 27 || φeπ minutes
|-
| Jul 28 || 4 megaseconds
|-
| Jul 29 || 216 minutes
|-
| Jul 30 || eee seconds
|-
| Jul 31 || π fortnights
|-
| Aug 1 || one devil's spacewalk (666 orbits of the ISS)
|-
| Aug 2 || 1 kilowatt-hour per watt
|-
| Aug 3 || eπ Ionian months
|-
| Aug 4 || 30 rotations of Foucault's pendulum in Paris
|-
| Aug 5 || e fortnights
|-
| Aug 6 || πe baker's days (25 hours)
|-
| Aug 7 || one deciyear
|-
| Aug 8 || 7! milliweeks
|-
| Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music
|-
| Aug 10 || 1000 basketball games (game time)
|-
| Aug 11 || 777 hours
|-
| Aug 12 || one millilincoln (1/1000 of fourscore and seven years)
|-
| Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads)
|-
| Aug 14 || All of ''Star Trek'', consecutively
|-
| Aug 15 || 777,777 nanocenturies
|-
| Aug 16 || one sidereal lunar month
|-
| Aug 17 || 6 dog months
|-
| Aug 18 || ππ kilominutes
|-
| Aug 19 || 7 games of ''7! minutes in Heaven''
|-
| Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy
|-
| Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times
|-
| Aug 22 || ''It's a Small World'' sung at 1/10,000th speed
|-
| Aug 23 || 500 hours
|-
| Aug 24 || √2 fortnights
|-
| Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles
|-
| Aug 26 || 100,000 breaths
|-
| Aug 27 || √2 megaseconds
|-
| Aug 28 || πππ πcoseconds
|-
| Aug 29 || One baker's fortnight (15 days)
|-
| Aug 30 || One baker's dozen (13) baker's days (25 hours)
|-
| Aug 31 || 300 hours
|-
| Sep 1 || One million seconds
|-
| Sep 2 || One nonstop bike ride from NYC to LA
|-
| Sep 3 || 1⁄1,000th of a generation
|-
| Sep 4 || 777,777 seconds
|-
| Sep 5 || 100 viewings of ''Groundhog Day''
|-
| Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven)
|-
| Sep 7 || One pico-universe-lifetime
|-
| Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks
|-
| Sep 9 || One centiyear
|-
| Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times
|-
| Sep 11 || ''Speed'' (1994) played at one frame per second
|-
| Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1)
|-
| Sep 13 || ''What If? 2'' release day
|}
{{comic discussion}}
[[Category:Book promotion]]
[[Category:Comics featuring real people]]
[[Category:Songs]]
[[Category:Animals]]

2636: What If? 2 Countdown

2022-06-24T20:29:20Z

162.158.166.183: /* Explanation */ round to two sig digits for days

{{comic
| number = 2636
| date = June 22, 2022
| title = What If? 2 Countdown
| image = what_if_2_countdown.png
| titletext = If you don't end the 99 Bottles of Beer recursion at N=0 it just becomes The Other Song That Never Ends.
}}

==Explanation==
{{incomplete|Created by FOUR SCORE AND 7 BOTTLES OF BEER ON THE WALL - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
This comic takes the idea of {{w|Advent calendar}}s, and takes it to the extreme. It uses rather absurd and/or obscure ways to measure the amount of time until [[Randall]]'s new book ''What if? 2'' is released, with esoteric units or esoteric numbers. And often both.

Some concepts that appear several times throughout the calendar are:

* '''{{w|SI prefixes}}''', which can be applied to the beginning of a unit's name to multiply or divide the unit by powers of 10 or 1,000. This is standard for units like meters and grams, but is rarely applied to measurements of time other than when a unit of less than one second is needed, most commonly in various fields of science and engineering such as physics and electronics.
* The '''{{w|Gettysburg Address}}''', a famous speech delivered by U.S. president Abraham Lincoln in 1863, where he began by referring to the signing of the Declaration of Independence taking place "four score and seven years ago". A score is a dated term for the number 20, so "four score and seven" is equivalent to 87.
* A '''dog year''' is traditionally considered to be one-seventh the length of a normal human year, since a dog's overall lifespan is roughly one-seventh of a typical human's. The comic applies this to other units of time, such as minutes and months, each of which is also one-seventh the length of the standard unit. The number 7 (traditionally a "lucky number") is also used in many of the numbers quoted in the calendar.
* Other comparative durations of time that are not normally or usefully applied to day-length multiples. At the top end, there is the age of the universe, at the other there is {{w|Planck units#Planck time|Planck-time}} – with entire durations of periods of human history and the time needed to watch popular TV/film franchises in-between – most of which require a non-trivial multiplier or divisor to bring them to the necessary scale required.
* A '''{{w|baker's dozen}}''' is 13, or one more than a normal dozen. Here, the "baker's" prefix can be applied to any unit by adding an extra one of its constituent parts, like an extra hour added to a day.
* '''{{w|Irrational numbers}}''' like {{w|pi}} (3.14159...), {{w|Euler's number}} or ''e'' (2.71828...), the {{w|golden ratio}} (1.61803...), and the {{w|square root of 2}} (1.41421...). These are all interesting numbers because of their mathematical properties, but very impractical to use as arbitrary measurements of time because they have an endless series of non-repeating decimal digits.
* The teenage dating game '''{{w|Seven minutes in heaven}}'''.
* Rotation and revolution periods of various planets and moons in the Solar System.

{| class="wikitable"
|-
! Days left !! Date !! Duration specified !! Duration in days !! Explanation
|-
| 83 || Jun 22 || πe millidecades || 82.03 days || π ≈ 3.14159, e ≈ 2.718, so πe is about 22.459. A millidecade is 1/1000 decade, or 1/100 year, or 3.652425 days. Multiplying these results in 82.03 days. This is a play on {{w|Euler's identity}}, eiπ=-1, but raising pi to the power of e instead.
|-
| 82 || Jun 23 || 7 megaseconds || 81.02 days || 7,000,000 seconds
|-
| 81 || Jun 24 || e lunar months || 80.27 days || A lunar month ≈ 29.53059 days, e ≈ 2.718
|-
| 80 || Jun 25 || 60 rotations of Foucault's pendulum in Paris || 79.67 days || '''{{w|Paris}}''' is the capital city of '''{{w|France}}''' and it's located at a latitude of 48º 51' 23" N. '''{{w|Foucault's pendulum}}''' is a device conceived by French physicist '''{{w|Léon Foucault}}''', consisting of a pendulum that is free to rotate its plane of oscillation. When placed in a rotating '''{{w|Non-inertial reference frame}}''' such as the '''{{w|Earth}}''', that has an associated rotation period of 24 hours, the oscillation plane of Foucault's pendulum rotates at a rate determined by the Earth's period and the angle between the rotation axis of the frame of reference and the direction of its elongation in resting position, i.e. its latitude, with a period T = T🜨/sin(λ), being T🜨 Earth's period and λ the latitude of the pendulum. Historically, Léon Foucault performed this experiment in the city of Paris, most famously (although not for the first time, which happened at the '''{{w|Paris Observatory}}''') under the dome of the '''{{w|Panthéon}}''', to demonstrate Earth's rotation. At this latitude, Foucault's pendulum completes a full rotation every 31.8 hours.
|-
| 79 || Jun 26 || 8 milligenerations || 78.89 days || A generation is in general 22-33 years, with a reasonable mid-point of 27; and 8 x 0.001 (milli) x 365.2425 (accounting for leap years) x 27 ≈ 78.89 days
|-
| 78 || Jun 27 || 777,777 dog minutes || 77.16 days || A popular myth is that dogs age 7 times faster than humans, so 1 dog minute equals 1/7 human minutes.
|-
| 77 || Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads) || 77+ days || 7! = 7x6x5x4x3x2x1 = 5040. The standard episode of ''Jeopardy'' is 22-26 minutes, skipping ads. At 22 minutes each, the total is 110880 minutes, or exactly 77 days.
|-
| 76 || Jun 29 || 5,000 repeats of ''99 Bottles of Beer'' || 76.39 days || Each verse of {{w|99 Bottles of Beer}} is "''N'' bottles of beer on the wall, ''N'' bottles of beer. Take one down, pass it around, ''N-1'' bottles of beer on the wall." The entire song contains 99 verses. Randall apparently sings this rather slowly at around 72 bpm, taking about 13 seconds per verse.
|-
| 75 || Jun 30 || 5 baker's fortnights || 75 days || A {{w|baker's dozen}} is a dozen (12) plus 1 extra item. Randall has generalized this to adding 1 to any unit. A fortnight is 2 weeks, so a baker's fortnight is 15 days. 5x15 is 75 days.
|-
| 74 || Jul 1 || √2 dog years || 73.79 days || See day 78 (Jun 27)
|-
| 73 || Jul 2 || π millivics (1/1000th of Queen Victoria's reign) || 72.97 days || {{w|Queen Victoria}} ruled between 20 June 1837 and 22 January 1901 (23,226 days).
|-
| 72 || Jul 3 || 42 drives from NYC to LA (Google Maps estimate) || 71.75 days || According to Google Maps, the drive from New York City to Los Angeles via I-80 W (2789 miles or 4489 km) takes 41 hours.
|-
| 71 || Jul 4 || 1,000 viewings of ''Groundhog Day''|| 70.14 days || Using {{w|Groundhog Day (film)|Groundhog Day's}} 101-minute run time.
|-
| 70 || Jul 5 || 100,000 minutes || 69.44 days ||
|-
| 69 || Jul 6 || 1/10th of Martian year || 68.70 Earth days || Martian sidereal and tropical years both round to 687.0 Earth days
|-
| 68 || Jul 7 || 1,234,567 sound-miles || 67.63 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 67.6349058 days.
|-
| 67 || Jul 8 || 2πe seconds || 66.74 days || 2^(π^e) = 5,766,073 seconds
|-
| 66 || Jul 9 || 216 beats (Swatch Internet Time) || 65.54 days || A "{{w|.beat}}" is equal to 1/1000 day.
|-
| 65 || Jul 10 || 1,000 ISS orbits || 64.58 days || Each orbit of the ISS takes 90-93 minutes. Here a value of 93 minutes is used.
|-
| 64 || Jul 11 || Five hundred twenty five thousand (base seven) minutes|| 62.88 days || This refers to {{w|radix}}-7 arithmetic: 525,0007 minutes = 90,55210 minutes. Also references the opening and recurring line "Five hundred twenty five thousand six hundred minutes" from {{w|Seasons of Love}}, a song from the musical {{w|Rent (musical)|''Rent''}}, which is also referenced in [[1047: Approximations]]. "base seven" has the same rhythm as "six hundred".
|-
| 63 || Jul 12 || 1050 Planck times || 62.38 days || 10^50 x 5.39 x 10^-44 seconds
|-
| 62 || Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)|| 62.50 days || {{w|The Office (British TV series)|''The Office''}} was originally a {{w|BBC}} television show which had no commercial breaks, but Randall is obviously more familiar with the {{w|The Office (American TV series)|US version}}. This US "half-hour" comedy format contains 22.5 minutes of content (including the title sequence) and 7.5 minutes of ads. 
|-
| 61 || Jul 14 || Four score and seven kilominutes || 60.42 days || 87 x 1000 minutes
|-
| 60 || Jul 15 || 2 lunar months || 59.06 days || There are a number of different ways to define the {{w|lunar month}}. The most common is the synodic month, because it relates to the phases of the moon, and it's approximately 29.53 days.
|-
| 59 || Jul 16 || Half a day on Venus || 58.38 Earth days || A Venus synodic day is 116 days 18 hours.
|-
| 58 || Jul 17 || 5 megaseconds || 57.87 days || 5,000,000 seconds
|-
| 57 || Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature) || 57.21 days || 5222 years × 30 × 10-6. The 3200 BCE date is the approximate advent of pre-Sumerian proto-writing as given in {{w|History of writing|Wikipedia's article on the history of writing}}.
|-
| 56 || Jul 19 || 1,000 viewings of ''Run Lola Run'' || 55.57 days || Using {{w|Run Lola Run|the movie's}} run time of 80 minutes.
|-
| 55 || Jul 20 || One million sound-miles || 54.78 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 54.7843137 days.
|-
| 54 || Jul 21 || 30 Ionian months || 53.07 days || Orbital period of Io around Jupiter is approximately 1.77 days.
|-
| 53 || Jul 22 || One dog year || 52.18 days || See day 78 (Jun 27)
|-
| 52 || Jul 23 || 60 viewings of ''Star Wars Episodes I-IX'' || 51.75 days || According to [https://dorksideoftheforce.com/2021/05/04/how-long-to-watch-every-star-wars-movie/ Fansided] the combined running times are 20 hours 42 minutes.
|-
| 51 || Jul 24 || 1/100,000,000,000th of the universe's age || 50.40 days || The universe is estimated to be about 13.8 billion years old.
|-
| 50 || Jul 25 || 5 milli-generations || 49.3 days || See day 79 (Jun 26)
|-
| 49 || Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven'' || 48.61 days || {{w|Seven minutes in heaven}} is an Anglo-culture teenager game, occuring in several movies. 10,000 minutes in Heaven is almost a week of making out (or doing whatever in a broom closet), so this game is unlikely.
|-
| 48 || Jul 27 || φeπ minutes || 47.62 days || 68,567.57 minutes
|-
| 47 || Jul 28 || 4 megaseconds || 46.30 days || 4,000,000 seconds
|-
| 46 || Jul 29 || 216 minutes || 45.51 days || 65,536 minutes
|-
| 45 || Jul 30 || eee seconds || 44.15 days || 3,814,279.10 seconds
|-
| 44 || Jul 31 || π fortnights|| 43.98 days || 3.14159 x 14 days
|-
| 43 || Aug 1 || One devil's spacewalk (666 orbits of the ISS) || 43.01 days || See day 65 (Jul 10). 666 is the {{w|number of the beast}}.
|-
| 42 || Aug 2 || 1 kilowatt-hour per watt || 41.66 days || 1000 hours
|-
| 41 || Aug 3 || eπ Ionian months || 40.94 days || Orbital period of Io around Jupiter is 1.769137786 days
|-
| 40 || Aug 4 || 30 rotations of Foucault's pendulum in Paris || 39.84 days || Refer to Day 80 (Jun 25)
|-
| 39 || Aug 5 || e fortnights || 38.06 days ||2.71828 x 14 days
|-
| 38 || Aug 6 || πe baker's days (25 hours) || 37.98 days || See day 75 (Jun 30)
|-
| 37 || Aug 7 || One deciyear || 36.52 days || One tenth of one year
|-
| 36 || Aug 8 || 7! milliweeks || 35.28 days || 5040 × 0.001 weeks
|-
| 35 || Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music || 34.72 days || ''Think'' is the music played while the contestants try to answer the Final Jeopardy question; it is 30 seconds long.
|-
| 34 || Aug 10 || 1000 basketball games (game time) || 33.33 days || Uses the NBA game time of four 12-minute quarters, or 48 minutes
|-
| 33 || Aug 11 || 777 hours || 32.38 days ||
|-
| 32 || Aug 12 || One millilincoln (1/1000 of fourscore and seven years) || 31.78 days || {{w|Abraham Lincoln}}'s {{w|Gettysburg Address}} begins with the famous phrase "Four score and seven years ago". 1 score = twenty. 
|-
| 31 || Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads) || 31.25 days || Uses a television 'hour' containing 45 minutes of content and 15 minutes of ads
|-
| 30 || Aug 14 || All of ''Star Trek'', consecutively || 27.16* days || As per [https://redshirtsalwaysdie.com/2021/01/22/take-far-longer-watch-star-trek-think/ RedShirtsAlwaysDie.com] of January 22, 2021. *Note well: dozens of additional ''Star Trek'' franchise episodes have been produced since, and more are presently scheduled to be released through June, July, and August, so this value is somewhat indeterminate over the scope of the countdown.
|-
| 29 || Aug 15 || 777,777 nanocenturies || 28.41 days || 777,777 × 10-9 × 100 years
|-
| 28 || Aug 16 || One sidereal lunar month || 27.3 days || The time it takes moon to return to the same position relative to the fixed stars
|-
| 27 || Aug 17 || 6 dog months || 26.1 days || See day 78 (Jun 27)
|-
| 26 || Aug 18 || ππ kilominutes || 25.32 days || 36,462.16 minutes
|-
| 25 || Aug 19 || 7 games of 7! minutes in Heaven || 24.5 days || 7 x 5040 (7 {{w|Factorial}}) minutes. See also day 49 (Jul 26).
|-
| 24 || Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy || 23.82 days || ''The Fellowship of the Ring'' extended version is 208 minutes, ''The Two Towers'' is 226 minutes, and ''The Return of the King'' is 252 minutes for its e.v., according to [https://fictionhorizon.com/how-long-are-all-the-lord-of-the-rings-and-the-hobbit-movies-combined/ FictionHorizon.com]
|-
| 23 || Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times || 22.21 days || See day 72 (Jul 3). This is for 6 round-trips and 1 one-way trip.
|-
| 22 || Aug 22 || ''It's a Small World'' sung at 1/10,000th speed || 21.18 days || {{w|It's a Small World}} is a song that was composed for the attraction of the same name at various {{w|Disney}} theme parks, and plays continuously at them in various languages.
|-
| 21 || Aug 23 || 500 hours || 20.83 days ||
|-
| 20 || Aug 24 || √2 fortnights || 19.80 days || 1.4142 × 14 days
|-
| 19 || Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles || 18.94 days || {{w|Vanessa Carlton}} is an American singer, and {{w|A Thousand Miles}} is her most successful song. Randall estimates her walking speed at about 2.2 miles/hour.
|-
| 18 || Aug 26 || 100,000 breaths || 15 seconds per breath for 17 days || Normal respiratory rate for adults is typically 12-20 breaths per minute, or about 3-4 seconds each. Randall may be a practitioner of "[https://www.frontiersin.org/articles/10.3389/fnhum.2018.00353/full slow breathing.]"
|-
| 17 || Aug 27 || √2 megaseconds || 16.37 days || 1.4142 × 1,000,000 seconds
|-
| 16 || Aug 28 || πππ πcoseconds || 15.51 days || 1.3402 × 1018 picoseconds (i.e., 10-12 seconds), making a joke how the mathematical "pi" is written with the character "π"
|-
| 15 || Aug 29 || One baker's fortnight (15 days) || 15 days || See day 75 (Jun 30)
|-
| 14 || Aug 30 || One baker's dozen (13) baker's days (25 hours) || 13.54 days || 325 hours; see day 75 (Jun 30)
|-
| 13 || Aug 31 || 300 hours || 12.5 days ||
|-
| 12 || Sep 1 || One million seconds || 11.57 days ||
|-
| 11 || Sep 2 || One nonstop bike ride from NYC to LA || 10.54 days || Google maps estimates the trip at 253 hours
|-
| 10 || Sep 3 || 1⁄1,000th of a generation || 9.86 days || See day 79 (Jun 26)
|-
| 9 || Sep 4 || 777,777 seconds || 9.002 days ||
|-
| 8 || Sep 5 || 100 viewings of ''Groundhog Day'' || 7.01 days || See Day 71 (Jul 4).
|-
| 7 || Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven) || 6.04 days || 8,700 minutes
|-
| 6 || Sep 7 || One pico-universe-lifetime || 5.04 days || See Day 51 (Jul 24)
|-
| 5 || Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks || 4.63 days || The chorus lasts about 8 seconds per 'person'
|-
| 4 || Sep 9 || One centiyear || 3.65 days || 365.24 days/100
|-
| 3 || Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times || 2.79 days || Based on a length of 4 minutes, 1 second
|-
| 2 || Sep 11 || ''Speed'' (1994) played at one frame per second || 1.9 days || {{w|Speed (1994 film)}} has runtime of 116 minutes = 6,960 seconds = 167,040 film frames at standard frame rate of 24 frames/second
|-
| 1 || Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1) || 0.76 days || Each iteration contains ''N'' verses. ''N + N-1 + N-2 ... + 1'' equals ''N * (N+1) / 2'', so 99 recursions = 4950 verses. Using the same 13-second (72 bpm) rate as Jun 29, this is close to 18 hours. Probably refers to Donald Knuth's article {{w|The Complexity of Songs}}.
|-
| 0 || Sep 13 || ''What If? 2'' release day || N/A ||
|}

The title text refers to the recursive time period on Sep 12. If you don't stop when you reach N=0 bottles, the repetition never ends, so that time interval becomes infinite. He likens it to {{w|The Song That Never Ends}}, another repetitive children's song, which is specifically intended to go on forever. The difference is that the Beer song has a natural stopping point at 0, while ''The Song That Never Ends'' is completely repetitive.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

Large heading: Countdown to ''What if? 2''

Subheading: (Preorder at [https://xkcd.com/whatif2 xkcd.com/whatif2] to get it at the end of the countdown)

Remainder of comic is a calendar with the date in one corner of each day's box.

{| class="wikitable"
|-
! Date !! Description
|-
| Jun 22 || πe millidecades
|-
| Jun 23 || 7 megaseconds
|-
| Jun 24 || e lunar months
|-
| Jun 25 || 60 rotations of Foucault's pendulum in Paris
|-
| Jun 26 || 8 milligenerations
|-
| Jun 27 || 777,777 dog minutes
|-
| Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads)
|-
| Jun 29 || 5,000 repeats of ''99 Bottles of Beer''
|-
| Jun 30 || 5 baker's fortnights (15 days)
|-
| Jul 1 || √2 dog years
|-
| Jul 2 || π millivics (1/1000th of Queen Victoria's reign)
|-
| Jul 3 || 42 drives from NYC to LA (Google Maps estimate)
|-
| Jul 4 || 1,000 viewings of ''Groundhog Day''
|-
| Jul 5 || 100,000 minutes
|-
| Jul 6 || 1/10th of Martian year
|-
| Jul 7 || 1,234,567 sound-miles
|-
| Jul 8 || 2πe seconds
|-
| Jul 9 || 216 beats (Swatch Internet Time)
|-
| Jul 10 || 1,000 ISS orbits
|-
| Jul 11 || Five hundred twenty five thousand (base seven) minutes (text preceded by several drawn musical notes)
|-
| Jul 12 || 1050 Planck times
|-
| Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)
|-
| Jul 14 || Four score and seven kilominutes
|-
| Jul 15 || 2 lunar months
|-
| Jul 16 || Half a day on Venus
|-
| Jul 17 || 5 megaseconds
|-
| Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature)
|-
| Jul 19 || 1,000 viewings of ''Run Lola Run''
|-
| Jul 20 || One million sound-miles
|-
| Jul 21 || 30 Ionian months
|-
| Jul 22 || One dog year
|-
| Jul 23 || 60 viewings of ''Star Wars Episodes I-IX''
|-
| Jul 24 || 1/100,000,000,000th of the universe's age
|-
| Jul 25 || 5 milli-generations
|-
| Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven''
|-
| Jul 27 || φeπ minutes
|-
| Jul 28 || 4 megaseconds
|-
| Jul 29 || 216 minutes
|-
| Jul 30 || eee seconds
|-
| Jul 31 || π fortnights
|-
| Aug 1 || one devil's spacewalk (666 orbits of the ISS)
|-
| Aug 2 || 1 kilowatt-hour per watt
|-
| Aug 3 || eπ Ionian months
|-
| Aug 4 || 30 rotations of Foucault's pendulum in Paris
|-
| Aug 5 || e fortnights
|-
| Aug 6 || πe baker's days (25 hours)
|-
| Aug 7 || one deciyear
|-
| Aug 8 || 7! milliweeks
|-
| Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music
|-
| Aug 10 || 1000 basketball games (game time)
|-
| Aug 11 || 777 hours
|-
| Aug 12 || one millilincoln (1/1000 of fourscore and seven years)
|-
| Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads)
|-
| Aug 14 || All of ''Star Trek'', consecutively
|-
| Aug 15 || 777,777 nanocenturies
|-
| Aug 16 || one sidereal lunar month
|-
| Aug 17 || 6 dog months
|-
| Aug 18 || ππ kilominutes
|-
| Aug 19 || 7 games of ''7! minutes in Heaven''
|-
| Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy
|-
| Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times
|-
| Aug 22 || ''It's a Small World'' sung at 1/10,000th speed
|-
| Aug 23 || 500 hours
|-
| Aug 24 || √2 fortnights
|-
| Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles
|-
| Aug 26 || 100,000 breaths
|-
| Aug 27 || √2 megaseconds
|-
| Aug 28 || πππ πcoseconds
|-
| Aug 29 || One baker's fortnight (15 days)
|-
| Aug 30 || One baker's dozen (13) baker's days (25 hours)
|-
| Aug 31 || 300 hours
|-
| Sep 1 || One million seconds
|-
| Sep 2 || One nonstop bike ride from NYC to LA
|-
| Sep 3 || 1⁄1,000th of a generation
|-
| Sep 4 || 777,777 seconds
|-
| Sep 5 || 100 viewings of ''Groundhog Day''
|-
| Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven)
|-
| Sep 7 || One pico-universe-lifetime
|-
| Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks
|-
| Sep 9 || One centiyear
|-
| Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times
|-
| Sep 11 || ''Speed'' (1994) played at one frame per second
|-
| Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1)
|-
| Sep 13 || ''What If? 2'' release day
|}
{{comic discussion}}
[[Category:Book promotion]]
[[Category:Comics featuring real people]]
[[Category:Songs]]
[[Category:Animals]]

Talk:2636: What If? 2 Countdown

2022-06-24T20:27:24Z

162.158.166.183: typo

I've started the table to explain all the calendar entries. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 00:19, 23 June 2022 (UTC)

Is the dog minutes calculation backwards? 777,777 dog minutes should be 777,777 x 7 human minutes, which is over 10 years. Randall seems to be dividing instead of multiplying. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 00:36, 23 June 2022 (UTC)
: No - 1 human year = 7 dog years; 1 dog year = 1/7 human year; 1 dog minute = 1/7 human minute; 777,777 dog minutes = 111,111 human minutes = 77 days, 3 hours, 51 minutes. [[Special:Contributions/172.70.90.173|172.70.90.173]] 11:32, 23 June 2022 (UTC)

First entry is probably mistake by Randall, e^pi would give value of 84.5 [[Special:Contributions/162.158.203.38|162.158.203.38]] 11:57, 23 June 2022 (UTC)
: That would be too high, though. 82.xxx days (from midnight at the start of launch day) would fall within the 83rd day before it (Jun 22). 84.5 would fall within the 85th (Jun 20). [[Special:Contributions/172.70.91.58|172.70.91.58]] 12:15, 23 June 2022 (UTC)

Not sure if this is even worth mentioning, but he forgot the box around the date number in the top corner for August 29th. [[Special:Contributions/172.70.126.151|172.70.126.151]] 12:49, 23 June 2022 (UTC)

Fyi, used wolfram alpha for most of the calculations. Seems to be able to handle anything I throw at it (nanocenturies, megaseconds, fortnights etc) [[User:Aditya95sriram|Aditya95sriram]] ([[User talk:Aditya95sriram|talk]]) 13:02, 23 June 2022 (UTC)aditya95sriram

Some of the calculations done forward (assuming what Randall means as a Generation, for example) might be best done as "to get this many days, what does Randall think ilhe is starting from. And see if 365, 365.25 or even 365.24 days per year works best, where relevent. Although I think in many cases you'll find the fractional differences negligable, when done right. (I'm also a bit surprised by the off-by-one errors in days-to-go and derived value, but I suspect that this is because of [[2585: Rounding|assymetric rounding effects]] that would be revealed by running the assumption backwards and seeing how different (or otherwise) the decimals actually are.) [[Special:Contributions/172.70.85.211|172.70.85.211]] 13:32, 23 June 2022 (UTC)
: I would suggest using 365.2425 days per year, as that's consistent with current leap year conventions. [[User:Dansiman|Dansiman]] ([[User talk:Dansiman|talk]]) 21:49, 23 June 2022 (UTC)
:: Did not see your comment, but already done trivial replacement. No recalculation that goes more complicated than magnitude, though.
::(For the mathematically curious, in the Gregorian calendar it's normally 365 days, but a leap day every four years (+0.25 => 365.25), except no leap day every century (-0.01 => 365.24), except there is every fourth century (+0.0025 => 365.2425). Which is very very close to the more astronomically-precise figure of 365.2422, at least at this point in our planet's history and definitely over the timescale of the Gregorian calendar itself. ''edit-to-add-convoluted-musings'': A successor system ''might'' need to de-reinstate three of the Four-Millenial leap-days in every 10,000 year period, or perhaps by re-removing four of its various leap-days then re-reinstating one of ''those'' back again, but by the time it's relevent I doubt that 365.2422 is going to be as valid for whatever reason... Hey, by then, maybe we could just deliberately adjust the Earth in or out a bit to make it a better fraction/not a fraction at all! )
::On the other hand, the old adage is "no use being precise over imprecise details". One can perhaps apply it to nominal decades (the true average decade; though a given decade might be 10*365 days plus either ''two'' or ''three'' leap-days, for 3652.5±0.5 days in that instance... not equally likely each way, though) but the Generations calculation already ''assumes'' 27 years per generation (not even 27.5, exactly half way between 22 and 33, which already seems a dubious backformation to suit other purposes) and gets a good-enough ''approximate'' number. Using a factor precise to around 1 in 146000 alongside one that's unlikely to be even as accurate as 1 in 54 is a bit rich and overly anal (rather than analytic) in the long-run.
::But this is explainxkcd, so I'm not saying it's misplaced, just that those who would be pedantic about everything (myself included) might find themselves even more out-pedanted in very reasonable circumstances... ;) [[Special:Contributions/172.70.162.77|172.70.162.77]] 22:47, 23 June 2022 (UTC)

Not sure about most numbers but at least the order of magnitude seemed plausible. I can't quite find a proper way to read August 28th. π^π^π is roughly 80662.666 - if you read πcoseconds as "picoseconds", that's way less than a second. I have no idea what π * coseconds are supposed to be. π * c * o * seconds doesn't look much better - there are values associated with "c" (speed of light, for example) but I have no idea what "o" could be and certainly nothing that would make this a unit of time. Sixteen days would be 1,353,600,000,000,000,000 ps (picoseconds). π^π^π^π is three orders of magnitude too small, π^π^π^π^π is many orders of magnitude too big a number. Am I missing something (really obvious, maybe?) here? [[User:627235|627235]] ([[User talk:627235|talk]]) 14:52, 23 June 2022 (UTC)
: Exponent towers are by convention evaluated top-down, so pi^pi^pi should be read as pi^(pi^pi), which is ~1.34e18, which in picoseconds is ~15.51 days. [[Special:Contributions/172.70.114.71|172.70.114.71]] 15:21, 23 June 2022 (UTC)

10,000 minutes in Heaven is making out for a week. I was able to find a record for the longest kiss (58 hours, 35 minutes), but not the longest make-out session. I think Randall may be indulging in some nerdy wishfull thinking. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 15:27, 23 June 2022 (UTC)

When the beer song reached F(0) how would you 'take one down' from -1 bottles of beer? Would they be imaginary bottles of beer? (Joking) At F(n-1) would there be a matter/antimatter annihilation, where Randal could do a riff of What-If #1 and describe the play by play of the bartender turning into exotic forms of matter? [[Special:Contributions/172.69.68.88|172.69.68.88]] 15:58, 23 June 2022 (UTC)
:(Not ✓-1, it's just straight repeated subtraction, not a power function...) After so much beer, you probably think it a good idea (even necessary) to fill cans up and start to put them back up on the wall... Not sure you could sustain it, to the point of F(-99), but I think someone'd be more than ready to start the process when F(-1) is invoked, for any group of just a few likely individuals.. [[Special:Contributions/172.70.91.58|172.70.91.58]] 16:23, 23 June 2022 (UTC)
:This begs the question of what beer bottles are doing on a wall, rather than a shelf. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 16:26, 23 June 2022 (UTC)
: Randall already considered what happens at F(0), refer to the title text. [[User:Paddles|Paddles]] ([[User talk:Paddles|talk]]) 08:16, 24 June 2022 (UTC)
: If you wanted to take down an imaginary bottle of beer, you'd have to take it from another wall that runs orthogonal to the original wall. [[Special:Contributions/172.70.85.211|172.70.85.211]] 08:50, 24 June 2022 (UTC)

We've finally filled in all the units columns in the table. Hopefully someone can automate turning that into a transcript. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 16:51, 23 June 2022 (UTC)

Funfact: This comic mentions Cyndi Lauper by name, and it was published on her birthday… [[Special:Contributions/162.158.38.27|162.158.38.27]] 20:51, 23 June 2022 (UTC)

Looks like someone's math is wrong on the explanation for July 18. I calculated using 4681 and 4763 years and they came out to 51.29 days and 52.19 days, respectively. So then I worked backwards and determined that Randall would actually have to be using a number closer to 5200 years to arrive at the correct result of 57 days. [[User:Dansiman|Dansiman]] ([[User talk:Dansiman|talk]]) 21:49, 23 June 2022 (UTC)

Randall seems to be wrong about "It's a Small World". The song is about 2 minutes long, so at 1/10,000 speed it's 20,000 minutes = 14 days. He seems to be using a length a little over 3 minutes. I found a YouTube video of the ride that's 3:45, but the song ends at 2:15 and the rest is silent. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 22:16, 23 June 2022 (UTC)
:[https://www.youtube.com/watch?v=PxRW-duSCLA This video of it] on YouTube lasts 3:02. It was uploaded by Universal Music Group (allied with Disney), making it some kind of 'official' version, and its length fits Randall's calculation. (Also, thanks for making the table!) [[User:DKMell|DKMell]] ([[User talk:DKMell|talk]]) 22:38, 23 June 2022 (UTC)
::That could be it. It has a long instrumental coda after the singing is done. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 14:07, 24 June 2022 (UTC)

Could "eπ Ionian months" also be a very subtle reference to the {{w|Euler identity}} given the first two characters of Ionian? Or am I reading/visualising a bit too much into it? [[User:Paddles|Paddles]] ([[User talk:Paddles|talk]]) 08:16, 24 June 2022 (UTC)

Aug 26 needs editing, but I just reset my password and can't fix it. At 4 breaths per minute, 100,000 breaths is 17.36 days. To get 17 days exactly, Randall would need to assume about 4.085 breaths per minute. [[User:Wjw|Wjw]] 08:24, 24 June 2022 (UTC)
:Most of the calculations are very approximate. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 14:07, 24 June 2022 (UTC)
::Many of them were given to subsecond digits of precision, too, so I rounded everything off to two significant digits of days unless there was some compelling reason to have 0, 1, or 3. Don't @ me, because I filled up and homogenized all that column, finally (except for 100,000 breaths, which are slow enough to be what I'm guessing is probably Randall's error.) If someone wants to get a better value for the total duration of ''Star Trek'' than the January, 2021 reference I found by counting all the released episodes since up to the date of the cartoon, please do. [[Special:Contributions/162.158.166.183|162.158.166.183]] 20:26, 24 June 2022 (UTC)

There's a closing /div HTML tag on the front page after the transcript (but not on this page). [[User:Nitpicking|Nitpicking]] ([[User talk:Nitpicking|talk]]) 17:21, 24 June 2022 (UTC)

Talk:2636: What If? 2 Countdown

2022-06-24T20:26:49Z

162.158.166.183: reply

I've started the table to explain all the calendar entries. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 00:19, 23 June 2022 (UTC)

Is the dog minutes calculation backwards? 777,777 dog minutes should be 777,777 x 7 human minutes, which is over 10 years. Randall seems to be dividing instead of multiplying. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 00:36, 23 June 2022 (UTC)
: No - 1 human year = 7 dog years; 1 dog year = 1/7 human year; 1 dog minute = 1/7 human minute; 777,777 dog minutes = 111,111 human minutes = 77 days, 3 hours, 51 minutes. [[Special:Contributions/172.70.90.173|172.70.90.173]] 11:32, 23 June 2022 (UTC)

First entry is probably mistake by Randall, e^pi would give value of 84.5 [[Special:Contributions/162.158.203.38|162.158.203.38]] 11:57, 23 June 2022 (UTC)
: That would be too high, though. 82.xxx days (from midnight at the start of launch day) would fall within the 83rd day before it (Jun 22). 84.5 would fall within the 85th (Jun 20). [[Special:Contributions/172.70.91.58|172.70.91.58]] 12:15, 23 June 2022 (UTC)

Not sure if this is even worth mentioning, but he forgot the box around the date number in the top corner for August 29th. [[Special:Contributions/172.70.126.151|172.70.126.151]] 12:49, 23 June 2022 (UTC)

Fyi, used wolfram alpha for most of the calculations. Seems to be able to handle anything I throw at it (nanocenturies, megaseconds, fortnights etc) [[User:Aditya95sriram|Aditya95sriram]] ([[User talk:Aditya95sriram|talk]]) 13:02, 23 June 2022 (UTC)aditya95sriram

Some of the calculations done forward (assuming what Randall means as a Generation, for example) might be best done as "to get this many days, what does Randall think ilhe is starting from. And see if 365, 365.25 or even 365.24 days per year works best, where relevent. Although I think in many cases you'll find the fractional differences negligable, when done right. (I'm also a bit surprised by the off-by-one errors in days-to-go and derived value, but I suspect that this is because of [[2585: Rounding|assymetric rounding effects]] that would be revealed by running the assumption backwards and seeing how different (or otherwise) the decimals actually are.) [[Special:Contributions/172.70.85.211|172.70.85.211]] 13:32, 23 June 2022 (UTC)
: I would suggest using 365.2425 days per year, as that's consistent with current leap year conventions. [[User:Dansiman|Dansiman]] ([[User talk:Dansiman|talk]]) 21:49, 23 June 2022 (UTC)
:: Did not see your comment, but already done trivial replacement. No recalculation that goes more complicated than magnitude, though.
::(For the mathematically curious, in the Gregorian calendar it's normally 365 days, but a leap day every four years (+0.25 => 365.25), except no leap day every century (-0.01 => 365.24), except there is every fourth century (+0.0025 => 365.2425). Which is very very close to the more astronomically-precise figure of 365.2422, at least at this point in our planet's history and definitely over the timescale of the Gregorian calendar itself. ''edit-to-add-convoluted-musings'': A successor system ''might'' need to de-reinstate three of the Four-Millenial leap-days in every 10,000 year period, or perhaps by re-removing four of its various leap-days then re-reinstating one of ''those'' back again, but by the time it's relevent I doubt that 365.2422 is going to be as valid for whatever reason... Hey, by then, maybe we could just deliberately adjust the Earth in or out a bit to make it a better fraction/not a fraction at all! )
::On the other hand, the old adage is "no use being precise over imprecise details". One can perhaps apply it to nominal decades (the true average decade; though a given decade might be 10*365 days plus either ''two'' or ''three'' leap-days, for 3652.5±0.5 days in that instance... not equally likely each way, though) but the Generations calculation already ''assumes'' 27 years per generation (not even 27.5, exactly half way between 22 and 33, which already seems a dubious backformation to suit other purposes) and gets a good-enough ''approximate'' number. Using a factor precise to around 1 in 146000 alongside one that's unlikely to be even as accurate as 1 in 54 is a bit rich and overly anal (rather than analytic) in the long-run.
::But this is explainxkcd, so I'm not saying it's misplaced, just that those who would be pedantic about everything (myself included) might find themselves even more out-pedanted in very reasonable circumstances... ;) [[Special:Contributions/172.70.162.77|172.70.162.77]] 22:47, 23 June 2022 (UTC)

Not sure about most numbers but at least the order of magnitude seemed plausible. I can't quite find a proper way to read August 28th. π^π^π is roughly 80662.666 - if you read πcoseconds as "picoseconds", that's way less than a second. I have no idea what π * coseconds are supposed to be. π * c * o * seconds doesn't look much better - there are values associated with "c" (speed of light, for example) but I have no idea what "o" could be and certainly nothing that would make this a unit of time. Sixteen days would be 1,353,600,000,000,000,000 ps (picoseconds). π^π^π^π is three orders of magnitude too small, π^π^π^π^π is many orders of magnitude too big a number. Am I missing something (really obvious, maybe?) here? [[User:627235|627235]] ([[User talk:627235|talk]]) 14:52, 23 June 2022 (UTC)
: Exponent towers are by convention evaluated top-down, so pi^pi^pi should be read as pi^(pi^pi), which is ~1.34e18, which in picoseconds is ~15.51 days. [[Special:Contributions/172.70.114.71|172.70.114.71]] 15:21, 23 June 2022 (UTC)

10,000 minutes in Heaven is making out for a week. I was able to find a record for the longest kiss (58 hours, 35 minutes), but not the longest make-out session. I think Randall may be indulging in some nerdy wishfull thinking. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 15:27, 23 June 2022 (UTC)

When the beer song reached F(0) how would you 'take one down' from -1 bottles of beer? Would they be imaginary bottles of beer? (Joking) At F(n-1) would there be a matter/antimatter annihilation, where Randal could do a riff of What-If #1 and describe the play by play of the bartender turning into exotic forms of matter? [[Special:Contributions/172.69.68.88|172.69.68.88]] 15:58, 23 June 2022 (UTC)
:(Not ✓-1, it's just straight repeated subtraction, not a power function...) After so much beer, you probably think it a good idea (even necessary) to fill cans up and start to put them back up on the wall... Not sure you could sustain it, to the point of F(-99), but I think someone'd be more than ready to start the process when F(-1) is invoked, for any group of just a few likely individuals.. [[Special:Contributions/172.70.91.58|172.70.91.58]] 16:23, 23 June 2022 (UTC)
:This begs the question of what beer bottles are doing on a wall, rather than a shelf. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 16:26, 23 June 2022 (UTC)
: Randall already considered what happens at F(0), refer to the title text. [[User:Paddles|Paddles]] ([[User talk:Paddles|talk]]) 08:16, 24 June 2022 (UTC)
: If you wanted to take down an imaginary bottle of beer, you'd have to take it from another wall that runs orthogonal to the original wall. [[Special:Contributions/172.70.85.211|172.70.85.211]] 08:50, 24 June 2022 (UTC)

We've finally filled in all the units columns in the table. Hopefully someone can automate turning that into a transcript. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 16:51, 23 June 2022 (UTC)

Funfact: This comic mentions Cyndi Lauper by name, and it was published on her birthday… [[Special:Contributions/162.158.38.27|162.158.38.27]] 20:51, 23 June 2022 (UTC)

Looks like someone's math is wrong on the explanation for July 18. I calculated using 4681 and 4763 years and they came out to 51.29 days and 52.19 days, respectively. So then I worked backwards and determined that Randall would actually have to be using a number closer to 5200 years to arrive at the correct result of 57 days. [[User:Dansiman|Dansiman]] ([[User talk:Dansiman|talk]]) 21:49, 23 June 2022 (UTC)

Randall seems to be wrong about "It's a Small World". The song is about 2 minutes long, so at 1/10,000 speed it's 20,000 minutes = 14 days. He seems to be using a length a little over 3 minutes. I found a YouTube video of the ride that's 3:45, but the song ends at 2:15 and the rest is silent. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 22:16, 23 June 2022 (UTC)
:[https://www.youtube.com/watch?v=PxRW-duSCLA This video of it] on YouTube lasts 3:02. It was uploaded by Universal Music Group (allied with Disney), making it some kind of 'official' version, and its length fits Randall's calculation. (Also, thanks for making the table!) [[User:DKMell|DKMell]] ([[User talk:DKMell|talk]]) 22:38, 23 June 2022 (UTC)
::That could be it. It has a long instrumental coda after the singing is done. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 14:07, 24 June 2022 (UTC)

Could "eπ Ionian months" also be a very subtle reference to the {{w|Euler identity}} given the first two characters of Ionian? Or am I reading/visualising a bit too much into it? [[User:Paddles|Paddles]] ([[User talk:Paddles|talk]]) 08:16, 24 June 2022 (UTC)

Aug 26 needs editing, but I just reset my password and can't fix it. At 4 breaths per minute, 100,000 breaths is 17.36 days. To get 17 days exactly, Randall would need to assume about 4.085 breaths per minute. [[User:Wjw|Wjw]] 08:24, 24 June 2022 (UTC)
:Most of the calculations are very approximate. [[User:Barmar|Barmar]] ([[User talk:Barmar|talk]]) 14:07, 24 June 2022 (UTC)
::Many of them were given to subsecond digits of precision, too, so I rounded everything off two two significant digits of days unless there was some compelling reason to have 0, 1, or 3. Don't @ me, because I filled up and homogenized all that column, finally (except for 100,000 breaths, which are slow enough to be what I'm guessing is probably Randall's error.) If someone wants to get a better value for the total duration of ''Star Trek'' than the January, 2021 reference I found by counting all the released episodes since up to the date of the cartoon, please do. [[Special:Contributions/162.158.166.183|162.158.166.183]] 20:26, 24 June 2022 (UTC)

There's a closing /div HTML tag on the front page after the transcript (but not on this page). [[User:Nitpicking|Nitpicking]] ([[User talk:Nitpicking|talk]]) 17:21, 24 June 2022 (UTC)

2636: What If? 2 Countdown

2022-06-24T20:21:27Z

162.158.166.183: /* Explanation */ typo

{{comic
| number = 2636
| date = June 22, 2022
| title = What If? 2 Countdown
| image = what_if_2_countdown.png
| titletext = If you don't end the 99 Bottles of Beer recursion at N=0 it just becomes The Other Song That Never Ends.
}}

==Explanation==
{{incomplete|Created by FOUR SCORE AND 7 BOTTLES OF BEER ON THE WALL - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
This comic takes the idea of {{w|Advent calendar}}s, and takes it to the extreme. It uses rather absurd and/or obscure ways to measure the amount of time until [[Randall]]'s new book ''What if? 2'' is released, with esoteric units or esoteric numbers. And often both.

Some concepts that appear several times throughout the calendar are:

* '''{{w|SI prefixes}}''', which can be applied to the beginning of a unit's name to multiply or divide the unit by powers of 10 or 1,000. This is standard for units like meters and grams, but is rarely applied to measurements of time other than when a unit of less than one second is needed, most commonly in various fields of science and engineering such as physics and electronics.
* The '''{{w|Gettysburg Address}}''', a famous speech delivered by U.S. president Abraham Lincoln in 1863, where he began by referring to the signing of the Declaration of Independence taking place "four score and seven years ago". A score is a dated term for the number 20, so "four score and seven" is equivalent to 87.
* A '''dog year''' is traditionally considered to be one-seventh the length of a normal human year, since a dog's overall lifespan is roughly one-seventh of a typical human's. The comic applies this to other units of time, such as minutes and months, each of which is also one-seventh the length of the standard unit. The number 7 (traditionally a "lucky number") is also used in many of the numbers quoted in the calendar.
* Other comparative durations of time that are not normally or usefully applied to day-length multiples. At the top end, there is the age of the universe, at the other there is {{w|Planck units#Planck time|Planck-time}} – with entire durations of periods of human history and the time needed to watch popular TV/film franchises in-between – most of which require a non-trivial multiplier or divisor to bring them to the necessary scale required.
* A '''{{w|baker's dozen}}''' is 13, or one more than a normal dozen. Here, the "baker's" prefix can be applied to any unit by adding an extra one of its constituent parts, like an extra hour added to a day.
* '''{{w|Irrational numbers}}''' like {{w|pi}} (3.14159...), {{w|Euler's number}} or ''e'' (2.71828...), the {{w|golden ratio}} (1.61803...), and the {{w|square root of 2}} (1.41421...). These are all interesting numbers because of their mathematical properties, but very impractical to use as arbitrary measurements of time because they have an endless series of non-repeating decimal digits.
* The teenage dating game '''{{w|Seven minutes in heaven}}'''.
* Rotation and revolution periods of various planets and moons in the Solar System.

{| class="wikitable"
|-
! Days left !! Date !! Duration specified !! Duration in days !! Explanation
|-
| 83 || Jun 22 || πe millidecades || 82.03 days || π ≈ 3.14159, e ≈ 2.718, so πe is about 22.459. A millidecade is 1/1000 decade, or 1/100 year, or 3.652425 days. Multiplying these results in 82.03 days. This is a play on {{w|Euler's identity}}, eiπ=-1, but raising pi to the power of e instead.
|-
| 82 || Jun 23 || 7 megaseconds || 81.02 days || 7,000,000 seconds
|-
| 81 || Jun 24 || e lunar months || 80.27 days || A lunar month ≈ 29.53059 days, e ≈ 2.718
|-
| 80 || Jun 25 || 60 rotations of Foucault's pendulum in Paris || 79.67 days || '''{{w|Paris}}''' is the capital city of '''{{w|France}}''' and it's located at a latitude of 48º 51' 23" N. '''{{w|Foucault's pendulum}}''' is a device conceived by French physicist '''{{w|Léon Foucault}}''', consisting of a pendulum that is free to rotate its plane of oscillation. When placed in a rotating '''{{w|Non-inertial reference frame}}''' such as the '''{{w|Earth}}''', that has an associated rotation period of 24 hours, the oscillation plane of Foucault's pendulum rotates at a rate determined by the Earth's period and the angle between the rotation axis of the frame of reference and the direction of its elongation in resting position, i.e. its latitude, with a period T = T🜨/sin(λ), being T🜨 Earth's period and λ the latitude of the pendulum. Historically, Léon Foucault performed this experiment in the city of Paris, most famously (although not for the first time, which happened at the '''{{w|Paris Observatory}}''') under the dome of the '''{{w|Panthéon}}''', to demonstrate Earth's rotation. At this latitude, Foucault's pendulum completes a full rotation every 31.8 hours.
|-
| 79 || Jun 26 || 8 milligenerations || 78.89 days || A generation is in general 22-33 years, with a reasonable mid-point of 27; and 8 x 0.001 (milli) x 365.2425 (accounting for leap years) x 27 ≈ 78.89 days
|-
| 78 || Jun 27 || 777,777 dog minutes || 77.16 days || A popular myth is that dogs age 7 times faster than humans, so 1 dog minute equals 1/7 human minutes.
|-
| 77 || Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads) || 77+ days || 7! = 7x6x5x4x3x2x1 = 5040. The standard episode of ''Jeopardy'' is 22-26 minutes, skipping ads. At 22 minutes each, the total is 110880 minutes, or exactly 77 days.
|-
| 76 || Jun 29 || 5,000 repeats of ''99 Bottles of Beer'' || 76.39 days || Each verse of {{w|99 Bottles of Beer}} is "''N'' bottles of beer on the wall, ''N'' bottles of beer. Take one down, pass it around, ''N-1'' bottles of beer on the wall." The entire song contains 99 verses. Randall apparently sings this rather slowly at around 72 bpm, taking about 13 seconds per verse.
|-
| 75 || Jun 30 || 5 baker's fortnights || 75 days || A {{w|baker's dozen}} is a dozen (12) plus 1 extra item. Randall has generalized this to adding 1 to any unit. A fortnight is 2 weeks, so a baker's fortnight is 15 days. 5x15 is 75 days.
|-
| 74 || Jul 1 || √2 dog years || 73.79 days || See day 78 (Jun 27)
|-
| 73 || Jul 2 || π millivics (1/1000th of Queen Victoria's reign) || 72.97 days || {{w|Queen Victoria}} ruled between 20 June 1837 and 22 January 1901 (23,226 days).
|-
| 72 || Jul 3 || 42 drives from NYC to LA (Google Maps estimate) || 71.75 days || According to Google Maps, the drive from New York City to Los Angeles via I-80 W (2789 miles or 4489 km) takes 41 hours.
|-
| 71 || Jul 4 || 1,000 viewings of ''Groundhog Day''|| 70.14 days || Using {{w|Groundhog Day (film)|Groundhog Day's}} 101-minute run time.
|-
| 70 || Jul 5 || 100,000 minutes || 69.44 days ||
|-
| 69 || Jul 6 || 1/10th of Martian year || 68.70 Earth days || Martian sidereal and tropical years both round to 687.0 Earth days
|-
| 68 || Jul 7 || 1,234,567 sound-miles || 67.63 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 67.6349058 days.
|-
| 67 || Jul 8 || 2πe seconds || 66.74 days || 2^(π^e) = 5,766,073 seconds
|-
| 66 || Jul 9 || 216 beats (Swatch Internet Time) || 65.54 days || A "{{w|.beat}}" is equal to 1/1000 day.
|-
| 65 || Jul 10 || 1,000 ISS orbits || 64.58 days || Each orbit of the ISS takes 90-93 minutes. Here a value of 93 minutes is used.
|-
| 64 || Jul 11 || Five hundred twenty five thousand (base seven) minutes|| 62.88 days || This refers to {{w|radix}}-7 arithmetic: 525,0007 minutes = 90,55210 minutes. Also references the opening and recurring line "Five hundred twenty five thousand six hundred minutes" from {{w|Seasons of Love}}, a song from the musical {{w|Rent (musical)|''Rent''}}, which is also referenced in [[1047: Approximations]]. "base seven" has the same rhythm as "six hundred".
|-
| 63 || Jul 12 || 1050 Planck times || 62.38 days || 10^50 x 5.39 x 10^-44 seconds
|-
| 62 || Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)|| 62.50 days || {{w|The Office (British TV series)|''The Office''}} was originally a {{w|BBC}} television show which had no commercial breaks, but Randall is obviously more familiar with the {{w|The Office (American TV series)|US version}}. This US "half-hour" comedy format contains 22.5 minutes of content (including the title sequence) and 7.5 minutes of ads. 
|-
| 61 || Jul 14 || Four score and seven kilominutes || 60.42 days || 87 x 1000 minutes
|-
| 60 || Jul 15 || 2 lunar months || 59.06 days || There are a number of different ways to define the {{w|lunar month}}. The most common is the synodic month, because it relates to the phases of the moon, and it's approximately 29.53 days.
|-
| 59 || Jul 16 || Half a day on Venus || 58.375 days || A Venus synodic day is 116 days 18 hours.
|-
| 58 || Jul 17 || 5 megaseconds || 57.87 days || 5,000,000 seconds
|-
| 57 || Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature) || 57.21 days || 5222 years × 30 × 10-6. The 3200 BCE date is the approximate advent of pre-Sumerian proto-writing as given in {{w|History of writing|Wikipedia's article on the history of writing}}.
|-
| 56 || Jul 19 || 1,000 viewings of ''Run Lola Run'' || 55.57 days || Using {{w|Run Lola Run|the movie's}} run time of 80 minutes.
|-
| 55 || Jul 20 || One million sound-miles || 54.78 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 54.7843137 days.
|-
| 54 || Jul 21 || 30 Ionian months || 53.07 days || Orbital period of Io around Jupiter is approximately 1.77 days.
|-
| 53 || Jul 22 || One dog year || 52.18 days || See day 78 (Jun 27)
|-
| 52 || Jul 23 || 60 viewings of ''Star Wars Episodes I-IX'' || 51.75 days || According to [https://dorksideoftheforce.com/2021/05/04/how-long-to-watch-every-star-wars-movie/ Fansided] the combined running times are 20 hours 42 minutes.
|-
| 51 || Jul 24 || 1/100,000,000,000th of the universe's age || 50.40 days || The universe is estimated to be about 13.8 billion years old.
|-
| 50 || Jul 25 || 5 milli-generations || 49.3 days || See day 79 (Jun 26)
|-
| 49 || Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven'' || 48.61 days || {{w|Seven minutes in heaven}} is an Anglo-culture teenager game, occuring in several movies. 10,000 minutes in Heaven is almost a week of making out (or doing whatever in a broom closet), so this game is unlikely.
|-
| 48 || Jul 27 || φeπ minutes || 47.62 days || 68,567.57 minutes
|-
| 47 || Jul 28 || 4 megaseconds || 46.30 days || 4,000,000 seconds
|-
| 46 || Jul 29 || 216 minutes || 45.51 days || 65,536 minutes
|-
| 45 || Jul 30 || eee seconds || 44.15 days || 3,814,279.10 seconds
|-
| 44 || Jul 31 || π fortnights|| 43.98 days || 3.14159 x 14 days
|-
| 43 || Aug 1 || One devil's spacewalk (666 orbits of the ISS) || 43.01 days || See day 65 (Jul 10). 666 is the {{w|number of the beast}}.
|-
| 42 || Aug 2 || 1 kilowatt-hour per watt || 41.66 days || 1000 hours
|-
| 41 || Aug 3 || eπ Ionian months || 40.94 days || Orbital period of Io around Jupiter is 1.769137786 days
|-
| 40 || Aug 4 || 30 rotations of Foucault's pendulum in Paris || 39.84 days || Refer to Day 80 (Jun 25)
|-
| 39 || Aug 5 || e fortnights || 38.06 days ||2.71828 x 14 days
|-
| 38 || Aug 6 || πe baker's days (25 hours) || 37.98 days || See day 75 (Jun 30)
|-
| 37 || Aug 7 || One deciyear || 36.52 days || One tenth of one year
|-
| 36 || Aug 8 || 7! milliweeks || 35.28 days || 5040 × 0.001 weeks
|-
| 35 || Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music || 34.72 days || ''Think'' is the music played while the contestants try to answer the Final Jeopardy question; it is 30 seconds long.
|-
| 34 || Aug 10 || 1000 basketball games (game time) || 33.33 days || Uses the NBA game time of four 12-minute quarters, or 48 minutes
|-
| 33 || Aug 11 || 777 hours || 32.38 days ||
|-
| 32 || Aug 12 || One millilincoln (1/1000 of fourscore and seven years) || 31.78 days || {{w|Abraham Lincoln}}'s {{w|Gettysburg Address}} begins with the famous phrase "Four score and seven years ago". 1 score = twenty. 
|-
| 31 || Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads) || 31.25 days || Uses a television 'hour' containing 45 minutes of content and 15 minutes of ads
|-
| 30 || Aug 14 || All of ''Star Trek'', consecutively || 27.16* days || As per [https://redshirtsalwaysdie.com/2021/01/22/take-far-longer-watch-star-trek-think/ RedShirtsAlwaysDie.com] of January 22, 2021. *Note well: dozens of additional ''Star Trek'' franchise episodes have been produced since, and more are presently scheduled to be released through June, July, and August, so this value is somewhat indeterminate over the scope of the countdown.
|-
| 29 || Aug 15 || 777,777 nanocenturies || 28.41 days || 777,777 × 10-9 × 100 years
|-
| 28 || Aug 16 || One sidereal lunar month || 27.3 days || The time it takes moon to return to the same position relative to the fixed stars
|-
| 27 || Aug 17 || 6 dog months || 26.1 days || See day 78 (Jun 27)
|-
| 26 || Aug 18 || ππ kilominutes || 25.32 days || 36,462.16 minutes
|-
| 25 || Aug 19 || 7 games of 7! minutes in Heaven || 24.5 days || 7 x 5040 (7 {{w|Factorial}}) minutes. See also day 49 (Jul 26).
|-
| 24 || Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy || 23.82 days || ''The Fellowship of the Ring'' extended version is 208 minutes, ''The Two Towers'' is 226 minutes, and ''The Return of the King'' is 252 minutes for its e.v., according to [https://fictionhorizon.com/how-long-are-all-the-lord-of-the-rings-and-the-hobbit-movies-combined/ FictionHorizon.com]
|-
| 23 || Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times || 22.21 days || See day 72 (Jul 3). This is for 6 round-trips and 1 one-way trip.
|-
| 22 || Aug 22 || ''It's a Small World'' sung at 1/10,000th speed || 21.18 days || {{w|It's a Small World}} is a song that was composed for the attraction of the same name at various {{w|Disney}} theme parks, and plays continuously at them in various languages.
|-
| 21 || Aug 23 || 500 hours || 20.83 days ||
|-
| 20 || Aug 24 || √2 fortnights || 19.80 days || 1.4142 × 14 days
|-
| 19 || Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles || 18.94 days || {{w|Vanessa Carlton}} is an American singer, and {{w|A Thousand Miles}} is her most successful song. Randall estimates her walking speed at about 2.2 miles/hour.
|-
| 18 || Aug 26 || 100,000 breaths || 15 seconds per breath for 17 days || Normal respiratory rate for adults is typically 12-20 breaths per minute, or about 3-4 seconds each. Randall may be a practitioner of "[https://www.frontiersin.org/articles/10.3389/fnhum.2018.00353/full slow breathing.]"
|-
| 17 || Aug 27 || √2 megaseconds || 16.37 days || 1.4142 × 1,000,000 seconds
|-
| 16 || Aug 28 || πππ πcoseconds || 15.51 days || 1.3402 × 1018 picoseconds (i.e., 10-12 seconds), making a joke how the mathematical "pi" is written with the character "π"
|-
| 15 || Aug 29 || One baker's fortnight (15 days) || 15 days || See day 75 (Jun 30)
|-
| 14 || Aug 30 || One baker's dozen (13) baker's days (25 hours) || 13.54 days || 325 hours; see day 75 (Jun 30)
|-
| 13 || Aug 31 || 300 hours || 12.5 days ||
|-
| 12 || Sep 1 || One million seconds || 11.57 days ||
|-
| 11 || Sep 2 || One nonstop bike ride from NYC to LA || 10.54 days || Google maps estimates the trip at 253 hours
|-
| 10 || Sep 3 || 1⁄1,000th of a generation || 9.86 days || See day 79 (Jun 26)
|-
| 9 || Sep 4 || 777,777 seconds || 9.002 days ||
|-
| 8 || Sep 5 || 100 viewings of ''Groundhog Day'' || 7.01 days || See Day 71 (Jul 4).
|-
| 7 || Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven) || 6.04 days || 8,700 minutes
|-
| 6 || Sep 7 || One pico-universe-lifetime || 5.04 days || See Day 51 (Jul 24)
|-
| 5 || Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks || 4.63 days || The chorus lasts about 8 seconds per 'person'
|-
| 4 || Sep 9 || One centiyear || 3.65 days || 365.24 days/100
|-
| 3 || Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times || 2.79 days || Based on a length of 4 minutes, 1 second
|-
| 2 || Sep 11 || ''Speed'' (1994) played at one frame per second || 1.9 days || {{w|Speed (1994 film)}} has runtime of 116 minutes = 6,960 seconds = 167,040 film frames at standard frame rate of 24 frames/second
|-
| 1 || Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1) || 0.76 days || Each iteration contains ''N'' verses. ''N + N-1 + N-2 ... + 1'' equals ''N * (N+1) / 2'', so 99 recursions = 4950 verses. Using the same 13-second (72 bpm) rate as Jun 29, this is close to 18 hours. Probably refers to Donald Knuth's article {{w|The Complexity of Songs}}.
|-
| 0 || Sep 13 || ''What If? 2'' release day || N/A ||
|}

The title text refers to the recursive time period on Sep 12. If you don't stop when you reach N=0 bottles, the repetition never ends, so that time interval becomes infinite. He likens it to {{w|The Song That Never Ends}}, another repetitive children's song, which is specifically intended to go on forever. The difference is that the Beer song has a natural stopping point at 0, while ''The Song That Never Ends'' is completely repetitive.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

Large heading: Countdown to ''What if? 2''

Subheading: (Preorder at [https://xkcd.com/whatif2 xkcd.com/whatif2] to get it at the end of the countdown)

Remainder of comic is a calendar with the date in one corner of each day's box.

{| class="wikitable"
|-
! Date !! Description
|-
| Jun 22 || πe millidecades
|-
| Jun 23 || 7 megaseconds
|-
| Jun 24 || e lunar months
|-
| Jun 25 || 60 rotations of Foucault's pendulum in Paris
|-
| Jun 26 || 8 milligenerations
|-
| Jun 27 || 777,777 dog minutes
|-
| Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads)
|-
| Jun 29 || 5,000 repeats of ''99 Bottles of Beer''
|-
| Jun 30 || 5 baker's fortnights (15 days)
|-
| Jul 1 || √2 dog years
|-
| Jul 2 || π millivics (1/1000th of Queen Victoria's reign)
|-
| Jul 3 || 42 drives from NYC to LA (Google Maps estimate)
|-
| Jul 4 || 1,000 viewings of ''Groundhog Day''
|-
| Jul 5 || 100,000 minutes
|-
| Jul 6 || 1/10th of Martian year
|-
| Jul 7 || 1,234,567 sound-miles
|-
| Jul 8 || 2πe seconds
|-
| Jul 9 || 216 beats (Swatch Internet Time)
|-
| Jul 10 || 1,000 ISS orbits
|-
| Jul 11 || Five hundred twenty five thousand (base seven) minutes (text preceded by several drawn musical notes)
|-
| Jul 12 || 1050 Planck times
|-
| Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)
|-
| Jul 14 || Four score and seven kilominutes
|-
| Jul 15 || 2 lunar months
|-
| Jul 16 || Half a day on Venus
|-
| Jul 17 || 5 megaseconds
|-
| Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature)
|-
| Jul 19 || 1,000 viewings of ''Run Lola Run''
|-
| Jul 20 || One million sound-miles
|-
| Jul 21 || 30 Ionian months
|-
| Jul 22 || One dog year
|-
| Jul 23 || 60 viewings of ''Star Wars Episodes I-IX''
|-
| Jul 24 || 1/100,000,000,000th of the universe's age
|-
| Jul 25 || 5 milli-generations
|-
| Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven''
|-
| Jul 27 || φeπ minutes
|-
| Jul 28 || 4 megaseconds
|-
| Jul 29 || 216 minutes
|-
| Jul 30 || eee seconds
|-
| Jul 31 || π fortnights
|-
| Aug 1 || one devil's spacewalk (666 orbits of the ISS)
|-
| Aug 2 || 1 kilowatt-hour per watt
|-
| Aug 3 || eπ Ionian months
|-
| Aug 4 || 30 rotations of Foucault's pendulum in Paris
|-
| Aug 5 || e fortnights
|-
| Aug 6 || πe baker's days (25 hours)
|-
| Aug 7 || one deciyear
|-
| Aug 8 || 7! milliweeks
|-
| Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music
|-
| Aug 10 || 1000 basketball games (game time)
|-
| Aug 11 || 777 hours
|-
| Aug 12 || one millilincoln (1/1000 of fourscore and seven years)
|-
| Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads)
|-
| Aug 14 || All of ''Star Trek'', consecutively
|-
| Aug 15 || 777,777 nanocenturies
|-
| Aug 16 || one sidereal lunar month
|-
| Aug 17 || 6 dog months
|-
| Aug 18 || ππ kilominutes
|-
| Aug 19 || 7 games of ''7! minutes in Heaven''
|-
| Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy
|-
| Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times
|-
| Aug 22 || ''It's a Small World'' sung at 1/10,000th speed
|-
| Aug 23 || 500 hours
|-
| Aug 24 || √2 fortnights
|-
| Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles
|-
| Aug 26 || 100,000 breaths
|-
| Aug 27 || √2 megaseconds
|-
| Aug 28 || πππ πcoseconds
|-
| Aug 29 || One baker's fortnight (15 days)
|-
| Aug 30 || One baker's dozen (13) baker's days (25 hours)
|-
| Aug 31 || 300 hours
|-
| Sep 1 || One million seconds
|-
| Sep 2 || One nonstop bike ride from NYC to LA
|-
| Sep 3 || 1⁄1,000th of a generation
|-
| Sep 4 || 777,777 seconds
|-
| Sep 5 || 100 viewings of ''Groundhog Day''
|-
| Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven)
|-
| Sep 7 || One pico-universe-lifetime
|-
| Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks
|-
| Sep 9 || One centiyear
|-
| Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times
|-
| Sep 11 || ''Speed'' (1994) played at one frame per second
|-
| Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1)
|-
| Sep 13 || ''What If? 2'' release day
|}
{{comic discussion}}
[[Category:Book promotion]]
[[Category:Comics featuring real people]]
[[Category:Songs]]
[[Category:Animals]]

2636: What If? 2 Countdown

2022-06-24T20:19:53Z

162.158.166.183: /* Explanation */ copyedit

{{comic
| number = 2636
| date = June 22, 2022
| title = What If? 2 Countdown
| image = what_if_2_countdown.png
| titletext = If you don't end the 99 Bottles of Beer recursion at N=0 it just becomes The Other Song That Never Ends.
}}

==Explanation==
{{incomplete|Created by FOUR SCORE AND 7 BOTTLES OF BEER ON THE WALL - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
This comic takes the idea of {{w|Advent calendar}}s, and takes it to the extreme. It uses rather absurd and/or obscure ways to measure the amount of time until [[Randall]]'s new book ''What if? 2'' is released, with esoteric units or esoteric numbers. And often both.

Some concepts that appear several times throughout the calendar are:

* '''{{w|SI prefixes}}''', which can be applied to the beginning of a unit's name to multiply or divide the unit by powers of 10 or 1,000. This is standard for units like meters and grams, but is rarely applied to measurements of time other than when a unit of less than one second is needed, most commonly in various fields of science and engineering such as physics and electronics.
* The '''{{w|Gettysburg Address}}''', a famous speech delivered by U.S. president Abraham Lincoln in 1863, where he began by referring to the signing of the Declaration of Independence taking place "four score and seven years ago". A score is a dated term for the number 20, so "four score and seven" is equivalent to 87.
* A '''dog year''' is traditionally considered to be one-seventh the length of a normal human year, since a dog's overall lifespan is roughly one-seventh of a typical human's. The comic applies this to other units of time, such as minutes and months, each of which is also one-seventh the length of the standard unit. The number 7 (traditionally a "lucky number") is also used in many of the numbers quoted in the calendar.
* Other comparative durations of time that are not normally or usefully applied to day-length multiples. At the top end, there is the age of the universe, at the other there is {{w|Planck units#Planck time|Planck-time}} – with entire durations of periods of human history and the time needed to watch popular TV/film franchises in-between – most of which require a non-trivial multiplier or divisor to bring them to the necessary scale required.
* A '''{{w|baker's dozen}}''' is 13, or one more than a normal dozen. Here, the "baker's" prefix can be applied to any unit by adding an extra one of its constituent parts, like an extra hour added to a day.
* '''{{w|Irrational numbers}}''' like {{w|pi}} (3.14159...), {{w|Euler's number}} or ''e'' (2.71828...), the {{w|golden ratio}} (1.61803...), and the {{w|square root of 2}} (1.41421...). These are all interesting numbers because of their mathematical properties, but very impractical to use as arbitrary measurements of time because they have an endless series of non-repeating decimal digits.
* The teenage dating game '''{{w|Seven minutes in heaven}}'''.
* Rotation and revolution periods of various planets and moons in the Solar System.

{| class="wikitable"
|-
! Days left !! Date !! Duration specified !! Duration in days !! Explanation
|-
| 83 || Jun 22 || πe millidecades || 82.03 days || π ≈ 3.14159, e ≈ 2.718, so πe is about 22.459. A millidecade is 1/1000 decade, or 1/100 year, or 3.652425 days. Multiplying these results in 82.03 days. This is a play on {{w|Euler's identity}}, eiπ=-1, but raising pi to the power of e instead.
|-
| 82 || Jun 23 || 7 megaseconds || 81.02 days || 7,000,000 seconds
|-
| 81 || Jun 24 || e lunar months || 80.27 days || A lunar month ≈ 29.53059 days, e ≈ 2.718
|-
| 80 || Jun 25 || 60 rotations of Foucault's pendulum in Paris || 79.67 days || '''{{w|Paris}}''' is the capital city of '''{{w|France}}''' and it's located at a latitude of 48º 51' 23" N. '''{{w|Foucault's pendulum}}''' is a device conceived by French physicist '''{{w|Léon Foucault}}''', consisting of a pendulum that is free to rotate its plane of oscillation. When placed in a rotating '''{{w|Non-inertial reference frame}}''' such as the '''{{w|Earth}}''', that has an associated rotation period of 24 hours, the oscillation plane of Foucault's pendulum rotates at a rate determined by the Earth's period and the angle between the rotation axis of the frame of reference and the direction of its elongation in resting position, i.e. its latitude, with a period T = T🜨/sin(λ), being T🜨 Earth's period and λ the latitude of the pendulum. Historically, Léon Foucault performed this experiment in the city of Paris, most famously (although not for the first time, which happened at the '''{{w|Paris Observatory}}''') under the dome of the '''{{w|Panthéon}}''', to demonstrate Earth's rotation. At this latitude, Foucault's pendulum completes a full rotation every 31.8 hours.
|-
| 79 || Jun 26 || 8 milligenerations || 78.89 days || A generation is in general 22-33 years, with a reasonable mid-point of 27; and 8 x 0.001 (milli) x 365.2425 (accounting for leap years) x 27 ≈ 78.89 days
|-
| 78 || Jun 27 || 777,777 dog minutes || 77.16 days || A popular myth is that dogs age 7 times faster than humans, so 1 dog minute equals 1/7 human minutes.
|-
| 77 || Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads) || 77+ days || 7! = 7x6x5x4x3x2x1 = 5040. The standard episode of ''Jeopardy'' is 22-26 minutes, skipping ads. At 22 minutes each, the total is 110880 minutes, or exactly 77 days.
|-
| 76 || Jun 29 || 5,000 repeats of ''99 Bottles of Beer'' || 76.39 days || Each verse of {{w|99 Bottles of Beer}} is "''N'' bottles of beer on the wall, ''N'' bottles of beer. Take one down, pass it around, ''N-1'' bottles of beer on the wall." The entire song contains 99 verses. Randall apparently sings this rather slowly at around 72 bpm, taking about 13 seconds per verse.
|-
| 75 || Jun 30 || 5 baker's fortnights || 75 days || A {{w|baker's dozen}} is a dozen (12) plus 1 extra item. Randall has generalized this to adding 1 to any unit. A fortnight is 2 weeks, so a baker's fortnight is 15 days. 5x15 is 75 days.
|-
| 74 || Jul 1 || √2 dog years || 73.79 days || See day 78 (Jun 27)
|-
| 73 || Jul 2 || π millivics (1/1000th of Queen Victoria's reign) || 72.97 days || {{w|Queen Victoria}} ruled between 20 June 1837 and 22 January 1901 (23,226 days).
|-
| 72 || Jul 3 || 42 drives from NYC to LA (Google Maps estimate) || 71.75 days || According to Google Maps, the drive from New York City to Los Angeles via I-80 W (2789 miles or 4489 km) takes 41 hours.
|-
| 71 || Jul 4 || 1,000 viewings of ''Groundhog Day''|| 70.14 days || Using {{w|Groundhog Day (film)|Groundhog Day's}} 101-minute run time.
|-
| 70 || Jul 5 || 100,000 minutes || 69.44 days ||
|-
| 69 || Jul 6 || 1/10th of Martian year || 68.70 Earth days || Martian sidereal and tropical years both round to 687.0 Earth days
|-
| 68 || Jul 7 || 1,234,567 sound-miles || 67.63 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 67.6349058 days.
|-
| 67 || Jul 8 || 2πe seconds || 66.74 days || 2^(π^e) = 5,766,073 seconds
|-
| 66 || Jul 9 || 216 beats (Swatch Internet Time) || 65.54 days || A "{{w|.beat}}" is equal to 1/1000 day.
|-
| 65 || Jul 10 || 1,000 ISS orbits || 64.58 days || Each orbit of the ISS takes 90-93 minutes. Here a value of 93 minutes is used.
|-
| 64 || Jul 11 || Five hundred twenty five thousand (base seven) minutes|| 62.88 days || This refers to {{w|radix}}-7 arithmetic: 525,0007 minutes = 90,55210 minutes. Also references the opening and recurring line "Five hundred twenty five thousand six hundred minutes" from {{w|Seasons of Love}}, a song from the musical {{w|Rent (musical)|''Rent''}}, which is also referenced in [[1047: Approximations]]. "base seven" has the same rhythm as "six hundred".
|-
| 63 || Jul 12 || 1050 Planck times || 62.38 days || 10^50 x 5.39 x 10^-44 seconds
|-
| 62 || Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)|| 62.50 days || {{w|The Office (British TV series)|''The Office''}} was originally a {{w|BBC}} television show which had no commercial breaks, but Randall is obviously more familiar with the {{w|The Office (American TV series)|US version}}. This US "half-hour" comedy format contains 22.5 minutes of content (including the title sequence) and 7.5 minutes of ads. 
|-
| 61 || Jul 14 || Four score and seven kilominutes || 60.42 days || 87 x 1000 minutes
|-
| 60 || Jul 15 || 2 lunar months || 59.06 days || There are a number of different ways to define the {{w|lunar month}}. The most common is the synodic month, because it relates to the phases of the moon, and it's approximately 29.53 days.
|-
| 59 || Jul 16 || Half a day on Venus || 58.375 days || A Venus synodic day is 116 days 18 hours.
|-
| 58 || Jul 17 || 5 megaseconds || 57.87 days || 5,000,000 seconds
|-
| 57 || Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature) || 57.21 days || 5222 years × 30 × 10-6. The 3200 BCE date the approximate advent of pre-Sumerian proto-writing as given in {{w|History of writing|Wikipedia's article on the history of writing}}.
|-
| 56 || Jul 19 || 1,000 viewings of ''Run Lola Run'' || 55.57 days || Using {{w|Run Lola Run|the movie's}} run time of 80 minutes.
|-
| 55 || Jul 20 || One million sound-miles || 54.78 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 54.7843137 days.
|-
| 54 || Jul 21 || 30 Ionian months || 53.07 days || Orbital period of Io around Jupiter is approximately 1.77 days.
|-
| 53 || Jul 22 || One dog year || 52.18 days || See day 78 (Jun 27)
|-
| 52 || Jul 23 || 60 viewings of ''Star Wars Episodes I-IX'' || 51.75 days || According to [https://dorksideoftheforce.com/2021/05/04/how-long-to-watch-every-star-wars-movie/ Fansided] the combined running times are 20 hours 42 minutes.
|-
| 51 || Jul 24 || 1/100,000,000,000th of the universe's age || 50.40 days || The universe is estimated to be about 13.8 billion years old.
|-
| 50 || Jul 25 || 5 milli-generations || 49.3 days || See day 79 (Jun 26)
|-
| 49 || Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven'' || 48.61 days || {{w|Seven minutes in heaven}} is an Anglo-culture teenager game, occuring in several movies. 10,000 minutes in Heaven is almost a week of making out (or doing whatever in a broom closet), so this game is unlikely.
|-
| 48 || Jul 27 || φeπ minutes || 47.62 days || 68,567.57 minutes
|-
| 47 || Jul 28 || 4 megaseconds || 46.30 days || 4,000,000 seconds
|-
| 46 || Jul 29 || 216 minutes || 45.51 days || 65,536 minutes
|-
| 45 || Jul 30 || eee seconds || 44.15 days || 3,814,279.10 seconds
|-
| 44 || Jul 31 || π fortnights|| 43.98 days || 3.14159 x 14 days
|-
| 43 || Aug 1 || One devil's spacewalk (666 orbits of the ISS) || 43.01 days || See day 65 (Jul 10). 666 is the {{w|number of the beast}}.
|-
| 42 || Aug 2 || 1 kilowatt-hour per watt || 41.66 days || 1000 hours
|-
| 41 || Aug 3 || eπ Ionian months || 40.94 days || Orbital period of Io around Jupiter is 1.769137786 days
|-
| 40 || Aug 4 || 30 rotations of Foucault's pendulum in Paris || 39.84 days || Refer to Day 80 (Jun 25)
|-
| 39 || Aug 5 || e fortnights || 38.06 days ||2.71828 x 14 days
|-
| 38 || Aug 6 || πe baker's days (25 hours) || 37.98 days || See day 75 (Jun 30)
|-
| 37 || Aug 7 || One deciyear || 36.52 days || One tenth of one year
|-
| 36 || Aug 8 || 7! milliweeks || 35.28 days || 5040 × 0.001 weeks
|-
| 35 || Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music || 34.72 days || ''Think'' is the music played while the contestants try to answer the Final Jeopardy question; it is 30 seconds long.
|-
| 34 || Aug 10 || 1000 basketball games (game time) || 33.33 days || Uses the NBA game time of four 12-minute quarters, or 48 minutes
|-
| 33 || Aug 11 || 777 hours || 32.38 days ||
|-
| 32 || Aug 12 || One millilincoln (1/1000 of fourscore and seven years) || 31.78 days || {{w|Abraham Lincoln}}'s {{w|Gettysburg Address}} begins with the famous phrase "Four score and seven years ago". 1 score = twenty. 
|-
| 31 || Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads) || 31.25 days || Uses a television 'hour' containing 45 minutes of content and 15 minutes of ads
|-
| 30 || Aug 14 || All of ''Star Trek'', consecutively || 27.16* days || As per [https://redshirtsalwaysdie.com/2021/01/22/take-far-longer-watch-star-trek-think/ RedShirtsAlwaysDie.com] of January 22, 2021. *Note well: dozens of additional ''Star Trek'' franchise episodes have been produced since, and more are presently scheduled to be released through June, July, and August, so this value is somewhat indeterminate over the scope of the countdown.
|-
| 29 || Aug 15 || 777,777 nanocenturies || 28.41 days || 777,777 × 10-9 × 100 years
|-
| 28 || Aug 16 || One sidereal lunar month || 27.3 days || The time it takes moon to return to the same position relative to the fixed stars
|-
| 27 || Aug 17 || 6 dog months || 26.1 days || See day 78 (Jun 27)
|-
| 26 || Aug 18 || ππ kilominutes || 25.32 days || 36,462.16 minutes
|-
| 25 || Aug 19 || 7 games of 7! minutes in Heaven || 24.5 days || 7 x 5040 (7 {{w|Factorial}}) minutes. See also day 49 (Jul 26).
|-
| 24 || Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy || 23.82 days || ''The Fellowship of the Ring'' extended version is 208 minutes, ''The Two Towers'' is 226 minutes, and ''The Return of the King'' is 252 minutes for its e.v., according to [https://fictionhorizon.com/how-long-are-all-the-lord-of-the-rings-and-the-hobbit-movies-combined/ FictionHorizon.com]
|-
| 23 || Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times || 22.21 days || See day 72 (Jul 3). This is for 6 round-trips and 1 one-way trip.
|-
| 22 || Aug 22 || ''It's a Small World'' sung at 1/10,000th speed || 21.18 days || {{w|It's a Small World}} is a song that was composed for the attraction of the same name at various {{w|Disney}} theme parks, and plays continuously at them in various languages.
|-
| 21 || Aug 23 || 500 hours || 20.83 days ||
|-
| 20 || Aug 24 || √2 fortnights || 19.80 days || 1.4142 × 14 days
|-
| 19 || Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles || 18.94 days || {{w|Vanessa Carlton}} is an American singer, and {{w|A Thousand Miles}} is her most successful song. Randall estimates her walking speed at about 2.2 miles/hour.
|-
| 18 || Aug 26 || 100,000 breaths || 15 seconds per breath for 17 days || Normal respiratory rate for adults is typically 12-20 breaths per minute, or about 3-4 seconds each. Randall may be a practitioner of "[https://www.frontiersin.org/articles/10.3389/fnhum.2018.00353/full slow breathing.]"
|-
| 17 || Aug 27 || √2 megaseconds || 16.37 days || 1.4142 × 1,000,000 seconds
|-
| 16 || Aug 28 || πππ πcoseconds || 15.51 days || 1.3402 × 1018 picoseconds (i.e., 10-12 seconds), making a joke how the mathematical "pi" is written with the character "π"
|-
| 15 || Aug 29 || One baker's fortnight (15 days) || 15 days || See day 75 (Jun 30)
|-
| 14 || Aug 30 || One baker's dozen (13) baker's days (25 hours) || 13.54 days || 325 hours; see day 75 (Jun 30)
|-
| 13 || Aug 31 || 300 hours || 12.5 days ||
|-
| 12 || Sep 1 || One million seconds || 11.57 days ||
|-
| 11 || Sep 2 || One nonstop bike ride from NYC to LA || 10.54 days || Google maps estimates the trip at 253 hours
|-
| 10 || Sep 3 || 1⁄1,000th of a generation || 9.86 days || See day 79 (Jun 26)
|-
| 9 || Sep 4 || 777,777 seconds || 9.002 days ||
|-
| 8 || Sep 5 || 100 viewings of ''Groundhog Day'' || 7.01 days || See Day 71 (Jul 4).
|-
| 7 || Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven) || 6.04 days || 8,700 minutes
|-
| 6 || Sep 7 || One pico-universe-lifetime || 5.04 days || See Day 51 (Jul 24)
|-
| 5 || Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks || 4.63 days || The chorus lasts about 8 seconds per 'person'
|-
| 4 || Sep 9 || One centiyear || 3.65 days || 365.24 days/100
|-
| 3 || Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times || 2.79 days || Based on a length of 4 minutes, 1 second
|-
| 2 || Sep 11 || ''Speed'' (1994) played at one frame per second || 1.9 days || {{w|Speed (1994 film)}} has runtime of 116 minutes = 6,960 seconds = 167,040 film frames at standard frame rate of 24 frames/second
|-
| 1 || Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1) || 0.76 days || Each iteration contains ''N'' verses. ''N + N-1 + N-2 ... + 1'' equals ''N * (N+1) / 2'', so 99 recursions = 4950 verses. Using the same 13-second (72 bpm) rate as Jun 29, this is close to 18 hours. Probably refers to Donald Knuth's article {{w|The Complexity of Songs}}.
|-
| 0 || Sep 13 || ''What If? 2'' release day || N/A ||
|}

The title text refers to the recursive time period on Sep 12. If you don't stop when you reach N=0 bottles, the repetition never ends, so that time interval becomes infinite. He likens it to {{w|The Song That Never Ends}}, another repetitive children's song, which is specifically intended to go on forever. The difference is that the Beer song has a natural stopping point at 0, while ''The Song That Never Ends'' is completely repetitive.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

Large heading: Countdown to ''What if? 2''

Subheading: (Preorder at [https://xkcd.com/whatif2 xkcd.com/whatif2] to get it at the end of the countdown)

Remainder of comic is a calendar with the date in one corner of each day's box.

{| class="wikitable"
|-
! Date !! Description
|-
| Jun 22 || πe millidecades
|-
| Jun 23 || 7 megaseconds
|-
| Jun 24 || e lunar months
|-
| Jun 25 || 60 rotations of Foucault's pendulum in Paris
|-
| Jun 26 || 8 milligenerations
|-
| Jun 27 || 777,777 dog minutes
|-
| Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads)
|-
| Jun 29 || 5,000 repeats of ''99 Bottles of Beer''
|-
| Jun 30 || 5 baker's fortnights (15 days)
|-
| Jul 1 || √2 dog years
|-
| Jul 2 || π millivics (1/1000th of Queen Victoria's reign)
|-
| Jul 3 || 42 drives from NYC to LA (Google Maps estimate)
|-
| Jul 4 || 1,000 viewings of ''Groundhog Day''
|-
| Jul 5 || 100,000 minutes
|-
| Jul 6 || 1/10th of Martian year
|-
| Jul 7 || 1,234,567 sound-miles
|-
| Jul 8 || 2πe seconds
|-
| Jul 9 || 216 beats (Swatch Internet Time)
|-
| Jul 10 || 1,000 ISS orbits
|-
| Jul 11 || Five hundred twenty five thousand (base seven) minutes (text preceded by several drawn musical notes)
|-
| Jul 12 || 1050 Planck times
|-
| Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)
|-
| Jul 14 || Four score and seven kilominutes
|-
| Jul 15 || 2 lunar months
|-
| Jul 16 || Half a day on Venus
|-
| Jul 17 || 5 megaseconds
|-
| Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature)
|-
| Jul 19 || 1,000 viewings of ''Run Lola Run''
|-
| Jul 20 || One million sound-miles
|-
| Jul 21 || 30 Ionian months
|-
| Jul 22 || One dog year
|-
| Jul 23 || 60 viewings of ''Star Wars Episodes I-IX''
|-
| Jul 24 || 1/100,000,000,000th of the universe's age
|-
| Jul 25 || 5 milli-generations
|-
| Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven''
|-
| Jul 27 || φeπ minutes
|-
| Jul 28 || 4 megaseconds
|-
| Jul 29 || 216 minutes
|-
| Jul 30 || eee seconds
|-
| Jul 31 || π fortnights
|-
| Aug 1 || one devil's spacewalk (666 orbits of the ISS)
|-
| Aug 2 || 1 kilowatt-hour per watt
|-
| Aug 3 || eπ Ionian months
|-
| Aug 4 || 30 rotations of Foucault's pendulum in Paris
|-
| Aug 5 || e fortnights
|-
| Aug 6 || πe baker's days (25 hours)
|-
| Aug 7 || one deciyear
|-
| Aug 8 || 7! milliweeks
|-
| Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music
|-
| Aug 10 || 1000 basketball games (game time)
|-
| Aug 11 || 777 hours
|-
| Aug 12 || one millilincoln (1/1000 of fourscore and seven years)
|-
| Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads)
|-
| Aug 14 || All of ''Star Trek'', consecutively
|-
| Aug 15 || 777,777 nanocenturies
|-
| Aug 16 || one sidereal lunar month
|-
| Aug 17 || 6 dog months
|-
| Aug 18 || ππ kilominutes
|-
| Aug 19 || 7 games of ''7! minutes in Heaven''
|-
| Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy
|-
| Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times
|-
| Aug 22 || ''It's a Small World'' sung at 1/10,000th speed
|-
| Aug 23 || 500 hours
|-
| Aug 24 || √2 fortnights
|-
| Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles
|-
| Aug 26 || 100,000 breaths
|-
| Aug 27 || √2 megaseconds
|-
| Aug 28 || πππ πcoseconds
|-
| Aug 29 || One baker's fortnight (15 days)
|-
| Aug 30 || One baker's dozen (13) baker's days (25 hours)
|-
| Aug 31 || 300 hours
|-
| Sep 1 || One million seconds
|-
| Sep 2 || One nonstop bike ride from NYC to LA
|-
| Sep 3 || 1⁄1,000th of a generation
|-
| Sep 4 || 777,777 seconds
|-
| Sep 5 || 100 viewings of ''Groundhog Day''
|-
| Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven)
|-
| Sep 7 || One pico-universe-lifetime
|-
| Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks
|-
| Sep 9 || One centiyear
|-
| Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times
|-
| Sep 11 || ''Speed'' (1994) played at one frame per second
|-
| Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1)
|-
| Sep 13 || ''What If? 2'' release day
|}
{{comic discussion}}
[[Category:Book promotion]]
[[Category:Comics featuring real people]]
[[Category:Songs]]
[[Category:Animals]]

2636: What If? 2 Countdown

2022-06-24T20:18:05Z

162.158.166.183: /* Explanation */ whoops

{{comic
| number = 2636
| date = June 22, 2022
| title = What If? 2 Countdown
| image = what_if_2_countdown.png
| titletext = If you don't end the 99 Bottles of Beer recursion at N=0 it just becomes The Other Song That Never Ends.
}}

==Explanation==
{{incomplete|Created by FOUR SCORE AND 7 BOTTLES OF BEER ON THE WALL - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
This comic takes the idea of {{w|Advent calendar}}s, and takes it to the extreme. It uses rather absurd and/or obscure ways to measure the amount of time until [[Randall]]'s new book ''What if? 2'' is released, with esoteric units or esoteric numbers. And often both.

Some concepts that appear several times throughout the calendar are:

* '''{{w|SI prefixes}}''', which can be applied to the beginning of a unit's name to multiply or divide the unit by powers of 10 or 1,000. This is standard for units like meters and grams, but is rarely applied to measurements of time other than when a unit of less than one second is needed, most commonly in various fields of science and engineering such as physics and electronics.
* The '''{{w|Gettysburg Address}}''', a famous speech delivered by U.S. president Abraham Lincoln in 1863, where he began by referring to the signing of the Declaration of Independence taking place "four score and seven years ago". A score is a dated term for the number 20, so "four score and seven" is equivalent to 87.
* A '''dog year''' is traditionally considered to be one-seventh the length of a normal human year, since a dog's overall lifespan is roughly one-seventh of a typical human's. The comic applies this to other units of time, such as minutes and months, each of which is also one-seventh the length of the standard unit. The number 7 (traditionally a "lucky number") is also used in many of the numbers quoted in the calendar.
* Other comparative durations of time that are not normally or usefully applied to day-length multiples. At the top end, there is the age of the universe, at the other there is {{w|Planck units#Planck time|Planck-time}} – with entire durations of periods of human history and the time needed to watch popular TV/film franchises in-between – most of which require a non-trivial multiplier or divisor to bring them to the necessary scale required.
* A '''{{w|baker's dozen}}''' is 13, or one more than a normal dozen. Here, the "baker's" prefix can be applied to any unit by adding an extra one of its constituent parts, like an extra hour added to a day.
* '''{{w|Irrational numbers}}''' like {{w|pi}} (3.14159...), {{w|Euler's number}} or ''e'' (2.71828...), the {{w|golden ratio}} (1.61803...), and the {{w|square root of 2}} (1.41421...). These are all interesting numbers because of their mathematical properties, but very impractical to use as arbitrary measurements of time because they have an endless series of non-repeating decimal digits.
* The teenage dating game '''{{w|Seven minutes in heaven}}'''.
* Rotation and revolution periods of various planets and moons in the Solar System.

{| class="wikitable"
|-
! Days left !! Date !! Duration specified !! Duration in days !! Explanation
|-
| 83 || Jun 22 || πe millidecades || 82.03 days || π ≈ 3.14159, e ≈ 2.718, so πe is about 22.459. A millidecade is 1/1000 decade, or 1/100 year, or 3.652425 days. Multiplying these results in 82.03 days. This is a play on {{w|Euler's identity}}, eiπ=-1, but raising pi to the power of e instead.
|-
| 82 || Jun 23 || 7 megaseconds || 81.02 days || 7,000,000 seconds
|-
| 81 || Jun 24 || e lunar months || 80.27 days || A lunar month ≈ 29.53059 days, e ≈ 2.718
|-
| 80 || Jun 25 || 60 rotations of Foucault's pendulum in Paris || 79.67 days || '''{{w|Paris}}''' is the capital city of '''{{w|France}}''' and it's located at a latitude of 48º 51' 23" N. '''{{w|Foucault's pendulum}}''' is a device conceived by French physicist '''{{w|Léon Foucault}}''', consisting of a pendulum that is free to rotate its plane of oscillation. When placed in a rotating '''{{w|Non-inertial reference frame}}''' such as the '''{{w|Earth}}''', that has an associated rotation period of 24 hours, the oscillation plane of Foucault's pendulum rotates at a rate determined by the Earth's period and the angle between the rotation axis of the frame of reference and the direction of its elongation in resting position, i.e. its latitude, with a period T = T🜨/sin(λ), being T🜨 Earth's period and λ the latitude of the pendulum. Historically, Léon Foucault performed this experiment in the city of Paris, most famously (although not for the first time, which happened at the '''{{w|Paris Observatory}}''') under the dome of the '''{{w|Panthéon}}''', to demonstrate Earth's rotation. At this latitude, Foucault's pendulum completes a full rotation every 31.8 hours.
|-
| 79 || Jun 26 || 8 milligenerations || 78.89 days || A generation is in general 22-33 years, with a reasonable mid-point of 27; and 8 x 0.001 (milli) x 365.2425 (accounting for leap years) x 27 ≈ 78.89 days
|-
| 78 || Jun 27 || 777,777 dog minutes || 77.16 days || A popular myth is that dogs age 7 times faster than humans, so 1 dog minute equals 1/7 human minutes.
|-
| 77 || Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads) || 77+ days || 7! = 7x6x5x4x3x2x1 = 5040. The standard episode of ''Jeopardy'' is 22-26 minutes, skipping ads. At 22 minutes each, the total is 110880 minutes, or exactly 77 days.
|-
| 76 || Jun 29 || 5,000 repeats of ''99 Bottles of Beer'' || 76.39 days || Each verse of {{w|99 Bottles of Beer}} is "''N'' bottles of beer on the wall, ''N'' bottles of beer. Take one down, pass it around, ''N-1'' bottles of beer on the wall." The entire song contains 99 verses. Randall apparently sings this rather slowly at around 72 bpm, taking about 13 seconds per verse.
|-
| 75 || Jun 30 || 5 baker's fortnights || 75 days || A {{w|baker's dozen}} is a dozen (12) plus 1 extra item. Randall has generalized this to adding 1 to any unit. A fortnight is 2 weeks, so a baker's fortnight is 15 days. 5x15 is 75 days.
|-
| 74 || Jul 1 || √2 dog years || 73.79 days || See day 78 (Jun 27)
|-
| 73 || Jul 2 || π millivics (1/1000th of Queen Victoria's reign) || 72.97 days || {{w|Queen Victoria}} ruled between 20 June 1837 and 22 January 1901 (23,226 days).
|-
| 72 || Jul 3 || 42 drives from NYC to LA (Google Maps estimate) || 71.75 days || According to Google Maps, the drive from New York City to Los Angeles via I-80 W (2789 miles or 4489 km) takes 41 hours.
|-
| 71 || Jul 4 || 1,000 viewings of ''Groundhog Day''|| 70.14 days || Using {{w|Groundhog Day (film)|Groundhog Day's}} 101-minute run time.
|-
| 70 || Jul 5 || 100,000 minutes || 69.44 days ||
|-
| 69 || Jul 6 || 1/10th of Martian year || 68.70 Earth days || Martian sidereal and tropical years both round to 687.0 Earth days
|-
| 68 || Jul 7 || 1,234,567 sound-miles || 67.63 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 67.6349058 days.
|-
| 67 || Jul 8 || 2πe seconds || 66.74 days || 2^(π^e) = 5,766,073 seconds
|-
| 66 || Jul 9 || 216 beats (Swatch Internet Time) || 65.54 days || A "{{w|.beat}}" is equal to 1/1000 day.
|-
| 65 || Jul 10 || 1,000 ISS orbits || 64.58 days || Each orbit of the ISS takes 90-93 minutes. Here a value of 93 minutes is used.
|-
| 64 || Jul 11 || Five hundred twenty five thousand (base seven) minutes|| 62.88 days || This refers to {{w|radix}}-7 arithmetic: 525,0007 minutes = 90,55210 minutes. Also references the opening and recurring line "Five hundred twenty five thousand six hundred minutes" from {{w|Seasons of Love}}, a song from the musical {{w|Rent (musical)|''Rent''}}, which is also referenced in [[1047: Approximations]]. "base seven" has the same rhythm as "six hundred".
|-
| 63 || Jul 12 || 1050 Planck times || 62.38 days || 10^50 x 5.39 x 10^-44 seconds
|-
| 62 || Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)|| 62.50 days || {{w|The Office (British TV series)|''The Office''}} was originally a {{w|BBC}} television show which had no commercial breaks, but Randall is obviously more familiar with the {{w|The Office (American TV series)|US version}}. This US "half-hour" comedy format contains 22.5 minutes of content (including the title sequence) and 7.5 minutes of ads. 
|-
| 61 || Jul 14 || Four score and seven kilominutes || 60.42 days || 87 x 1000 minutes
|-
| 60 || Jul 15 || 2 lunar months || 59.06 days || There are a number of different ways to define the {{w|lunar month}}. The most common is the synodic month, because it relates to the phases of the moon, and it's approximately 29.53 days.
|-
| 59 || Jul 16 || Half a day on Venus || 58.375 days || A Venus synodic day is 116 days 18 hours.
|-
| 58 || Jul 17 || 5 megaseconds || 57.87 days || 5,000,000 seconds
|-
| 57 || Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature) || 57.21 days || 5222 years × 30 × 10-6. The 3200 BCE date is consistent with the approximate date of pre-Sumerian proto-writing given in Wikipedia's article on the {{w|history of writing}}.
|-
| 56 || Jul 19 || 1,000 viewings of ''Run Lola Run'' || 55.57 days || Using {{w|Run Lola Run|the movie's}} run time of 80 minutes.
|-
| 55 || Jul 20 || One million sound-miles || 54.78 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 54.7843137 days.
|-
| 54 || Jul 21 || 30 Ionian months || 53.07 days || Orbital period of Io around Jupiter is approximately 1.77 days.
|-
| 53 || Jul 22 || One dog year || 52.18 days || See day 78 (Jun 27)
|-
| 52 || Jul 23 || 60 viewings of ''Star Wars Episodes I-IX'' || 51.75 days || According to [https://dorksideoftheforce.com/2021/05/04/how-long-to-watch-every-star-wars-movie/ Fansided] the combined running times are 20 hours 42 minutes.
|-
| 51 || Jul 24 || 1/100,000,000,000th of the universe's age || 50.40 days || The universe is estimated to be about 13.8 billion years old.
|-
| 50 || Jul 25 || 5 milli-generations || 49.3 days || See day 79 (Jun 26)
|-
| 49 || Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven'' || 48.61 days || {{w|Seven minutes in heaven}} is an Anglo-culture teenager game, occuring in several movies. 10,000 minutes in Heaven is almost a week of making out (or doing whatever in a broom closet), so this game is unlikely.
|-
| 48 || Jul 27 || φeπ minutes || 47.62 days || 68,567.57 minutes
|-
| 47 || Jul 28 || 4 megaseconds || 46.30 days || 4,000,000 seconds
|-
| 46 || Jul 29 || 216 minutes || 45.51 days || 65,536 minutes
|-
| 45 || Jul 30 || eee seconds || 44.15 days || 3,814,279.10 seconds
|-
| 44 || Jul 31 || π fortnights|| 43.98 days || 3.14159 x 14 days
|-
| 43 || Aug 1 || One devil's spacewalk (666 orbits of the ISS) || 43.01 days || See day 65 (Jul 10). 666 is the {{w|number of the beast}}.
|-
| 42 || Aug 2 || 1 kilowatt-hour per watt || 41.66 days || 1000 hours
|-
| 41 || Aug 3 || eπ Ionian months || 40.94 days || Orbital period of Io around Jupiter is 1.769137786 days
|-
| 40 || Aug 4 || 30 rotations of Foucault's pendulum in Paris || 39.84 days || Refer to Day 80 (Jun 25)
|-
| 39 || Aug 5 || e fortnights || 38.06 days ||2.71828 x 14 days
|-
| 38 || Aug 6 || πe baker's days (25 hours) || 37.98 days || See day 75 (Jun 30)
|-
| 37 || Aug 7 || One deciyear || 36.52 days || One tenth of one year
|-
| 36 || Aug 8 || 7! milliweeks || 35.28 days || 5040 × 0.001 weeks
|-
| 35 || Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music || 34.72 days || ''Think'' is the music played while the contestants try to answer the Final Jeopardy question; it is 30 seconds long.
|-
| 34 || Aug 10 || 1000 basketball games (game time) || 33.33 days || Uses the NBA game time of four 12-minute quarters, or 48 minutes
|-
| 33 || Aug 11 || 777 hours || 32.38 days ||
|-
| 32 || Aug 12 || One millilincoln (1/1000 of fourscore and seven years) || 31.78 days || {{w|Abraham Lincoln}}'s {{w|Gettysburg Address}} begins with the famous phrase "Four score and seven years ago". 1 score = twenty. 
|-
| 31 || Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads) || 31.25 days || Uses a television 'hour' containing 45 minutes of content and 15 minutes of ads
|-
| 30 || Aug 14 || All of ''Star Trek'', consecutively || 27.16* days || As per [https://redshirtsalwaysdie.com/2021/01/22/take-far-longer-watch-star-trek-think/ RedShirtsAlwaysDie.com] of January 22, 2021. *Note well: dozens of additional ''Star Trek'' franchise episodes have been produced since, and more are presently scheduled to be released through June, July, and August, so this value is somewhat indeterminate over the scope of the countdown.
|-
| 29 || Aug 15 || 777,777 nanocenturies || 28.41 days || 777,777 × 10-9 × 100 years
|-
| 28 || Aug 16 || One sidereal lunar month || 27.3 days || The time it takes moon to return to the same position relative to the fixed stars
|-
| 27 || Aug 17 || 6 dog months || 26.1 days || See day 78 (Jun 27)
|-
| 26 || Aug 18 || ππ kilominutes || 25.32 days || 36,462.16 minutes
|-
| 25 || Aug 19 || 7 games of 7! minutes in Heaven || 24.5 days || 7 x 5040 (7 {{w|Factorial}}) minutes. See also day 49 (Jul 26).
|-
| 24 || Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy || 23.82 days || ''The Fellowship of the Ring'' extended version is 208 minutes, ''The Two Towers'' is 226 minutes, and ''The Return of the King'' is 252 minutes for its e.v., according to [https://fictionhorizon.com/how-long-are-all-the-lord-of-the-rings-and-the-hobbit-movies-combined/ FictionHorizon.com]
|-
| 23 || Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times || 22.21 days || See day 72 (Jul 3). This is for 6 round-trips and 1 one-way trip.
|-
| 22 || Aug 22 || ''It's a Small World'' sung at 1/10,000th speed || 21.18 days || {{w|It's a Small World}} is a song that was composed for the attraction of the same name at various {{w|Disney}} theme parks, and plays continuously at them in various languages.
|-
| 21 || Aug 23 || 500 hours || 20.83 days ||
|-
| 20 || Aug 24 || √2 fortnights || 19.80 days || 1.4142 × 14 days
|-
| 19 || Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles || 18.94 days || {{w|Vanessa Carlton}} is an American singer, and {{w|A Thousand Miles}} is her most successful song. Randall estimates her walking speed at about 2.2 miles/hour.
|-
| 18 || Aug 26 || 100,000 breaths || 15 seconds per breath for 17 days || Normal respiratory rate for adults is typically 12-20 breaths per minute, or about 3-4 seconds each. Randall may be a practitioner of "[https://www.frontiersin.org/articles/10.3389/fnhum.2018.00353/full slow breathing.]"
|-
| 17 || Aug 27 || √2 megaseconds || 16.37 days || 1.4142 × 1,000,000 seconds
|-
| 16 || Aug 28 || πππ πcoseconds || 15.51 days || 1.3402 × 1018 picoseconds (i.e., 10-12 seconds), making a joke how the mathematical "pi" is written with the character "π"
|-
| 15 || Aug 29 || One baker's fortnight (15 days) || 15 days || See day 75 (Jun 30)
|-
| 14 || Aug 30 || One baker's dozen (13) baker's days (25 hours) || 13.54 days || 325 hours; see day 75 (Jun 30)
|-
| 13 || Aug 31 || 300 hours || 12.5 days ||
|-
| 12 || Sep 1 || One million seconds || 11.57 days ||
|-
| 11 || Sep 2 || One nonstop bike ride from NYC to LA || 10.54 days || Google maps estimates the trip at 253 hours
|-
| 10 || Sep 3 || 1⁄1,000th of a generation || 9.86 days || See day 79 (Jun 26)
|-
| 9 || Sep 4 || 777,777 seconds || 9.002 days ||
|-
| 8 || Sep 5 || 100 viewings of ''Groundhog Day'' || 7.01 days || See Day 71 (Jul 4).
|-
| 7 || Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven) || 6.04 days || 8,700 minutes
|-
| 6 || Sep 7 || One pico-universe-lifetime || 5.04 days || See Day 51 (Jul 24)
|-
| 5 || Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks || 4.63 days || The chorus lasts about 8 seconds per 'person'
|-
| 4 || Sep 9 || One centiyear || 3.65 days || 365.24 days/100
|-
| 3 || Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times || 2.79 days || Based on a length of 4 minutes, 1 second
|-
| 2 || Sep 11 || ''Speed'' (1994) played at one frame per second || 1.9 days || {{w|Speed (1994 film)}} has runtime of 116 minutes = 6,960 seconds = 167,040 film frames at standard frame rate of 24 frames/second
|-
| 1 || Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1) || 0.76 days || Each iteration contains ''N'' verses. ''N + N-1 + N-2 ... + 1'' equals ''N * (N+1) / 2'', so 99 recursions = 4950 verses. Using the same 13-second (72 bpm) rate as Jun 29, this is close to 18 hours. Probably refers to Donald Knuth's article {{w|The Complexity of Songs}}.
|-
| 0 || Sep 13 || ''What If? 2'' release day || N/A ||
|}

The title text refers to the recursive time period on Sep 12. If you don't stop when you reach N=0 bottles, the repetition never ends, so that time interval becomes infinite. He likens it to {{w|The Song That Never Ends}}, another repetitive children's song, which is specifically intended to go on forever. The difference is that the Beer song has a natural stopping point at 0, while ''The Song That Never Ends'' is completely repetitive.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

Large heading: Countdown to ''What if? 2''

Subheading: (Preorder at [https://xkcd.com/whatif2 xkcd.com/whatif2] to get it at the end of the countdown)

Remainder of comic is a calendar with the date in one corner of each day's box.

{| class="wikitable"
|-
! Date !! Description
|-
| Jun 22 || πe millidecades
|-
| Jun 23 || 7 megaseconds
|-
| Jun 24 || e lunar months
|-
| Jun 25 || 60 rotations of Foucault's pendulum in Paris
|-
| Jun 26 || 8 milligenerations
|-
| Jun 27 || 777,777 dog minutes
|-
| Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads)
|-
| Jun 29 || 5,000 repeats of ''99 Bottles of Beer''
|-
| Jun 30 || 5 baker's fortnights (15 days)
|-
| Jul 1 || √2 dog years
|-
| Jul 2 || π millivics (1/1000th of Queen Victoria's reign)
|-
| Jul 3 || 42 drives from NYC to LA (Google Maps estimate)
|-
| Jul 4 || 1,000 viewings of ''Groundhog Day''
|-
| Jul 5 || 100,000 minutes
|-
| Jul 6 || 1/10th of Martian year
|-
| Jul 7 || 1,234,567 sound-miles
|-
| Jul 8 || 2πe seconds
|-
| Jul 9 || 216 beats (Swatch Internet Time)
|-
| Jul 10 || 1,000 ISS orbits
|-
| Jul 11 || Five hundred twenty five thousand (base seven) minutes (text preceded by several drawn musical notes)
|-
| Jul 12 || 1050 Planck times
|-
| Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)
|-
| Jul 14 || Four score and seven kilominutes
|-
| Jul 15 || 2 lunar months
|-
| Jul 16 || Half a day on Venus
|-
| Jul 17 || 5 megaseconds
|-
| Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature)
|-
| Jul 19 || 1,000 viewings of ''Run Lola Run''
|-
| Jul 20 || One million sound-miles
|-
| Jul 21 || 30 Ionian months
|-
| Jul 22 || One dog year
|-
| Jul 23 || 60 viewings of ''Star Wars Episodes I-IX''
|-
| Jul 24 || 1/100,000,000,000th of the universe's age
|-
| Jul 25 || 5 milli-generations
|-
| Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven''
|-
| Jul 27 || φeπ minutes
|-
| Jul 28 || 4 megaseconds
|-
| Jul 29 || 216 minutes
|-
| Jul 30 || eee seconds
|-
| Jul 31 || π fortnights
|-
| Aug 1 || one devil's spacewalk (666 orbits of the ISS)
|-
| Aug 2 || 1 kilowatt-hour per watt
|-
| Aug 3 || eπ Ionian months
|-
| Aug 4 || 30 rotations of Foucault's pendulum in Paris
|-
| Aug 5 || e fortnights
|-
| Aug 6 || πe baker's days (25 hours)
|-
| Aug 7 || one deciyear
|-
| Aug 8 || 7! milliweeks
|-
| Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music
|-
| Aug 10 || 1000 basketball games (game time)
|-
| Aug 11 || 777 hours
|-
| Aug 12 || one millilincoln (1/1000 of fourscore and seven years)
|-
| Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads)
|-
| Aug 14 || All of ''Star Trek'', consecutively
|-
| Aug 15 || 777,777 nanocenturies
|-
| Aug 16 || one sidereal lunar month
|-
| Aug 17 || 6 dog months
|-
| Aug 18 || ππ kilominutes
|-
| Aug 19 || 7 games of ''7! minutes in Heaven''
|-
| Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy
|-
| Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times
|-
| Aug 22 || ''It's a Small World'' sung at 1/10,000th speed
|-
| Aug 23 || 500 hours
|-
| Aug 24 || √2 fortnights
|-
| Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles
|-
| Aug 26 || 100,000 breaths
|-
| Aug 27 || √2 megaseconds
|-
| Aug 28 || πππ πcoseconds
|-
| Aug 29 || One baker's fortnight (15 days)
|-
| Aug 30 || One baker's dozen (13) baker's days (25 hours)
|-
| Aug 31 || 300 hours
|-
| Sep 1 || One million seconds
|-
| Sep 2 || One nonstop bike ride from NYC to LA
|-
| Sep 3 || 1⁄1,000th of a generation
|-
| Sep 4 || 777,777 seconds
|-
| Sep 5 || 100 viewings of ''Groundhog Day''
|-
| Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven)
|-
| Sep 7 || One pico-universe-lifetime
|-
| Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks
|-
| Sep 9 || One centiyear
|-
| Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times
|-
| Sep 11 || ''Speed'' (1994) played at one frame per second
|-
| Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1)
|-
| Sep 13 || ''What If? 2'' release day
|}
{{comic discussion}}
[[Category:Book promotion]]
[[Category:Comics featuring real people]]
[[Category:Songs]]
[[Category:Animals]]

2636: What If? 2 Countdown

2022-06-24T20:17:00Z

162.158.166.183: /* Explanation */ convert to days

{{comic
| number = 2636
| date = June 22, 2022
| title = What If? 2 Countdown
| image = what_if_2_countdown.png
| titletext = If you don't end the 99 Bottles of Beer recursion at N=0 it just becomes The Other Song That Never Ends.
}}

==Explanation==
{{incomplete|Created by FOUR SCORE AND 7 BOTTLES OF BEER ON THE WALL - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
This comic takes the idea of {{w|Advent calendar}}s, and takes it to the extreme. It uses rather absurd and/or obscure ways to measure the amount of time until [[Randall]]'s new book ''What if? 2'' is released, with esoteric units or esoteric numbers. And often both.

Some concepts that appear several times throughout the calendar are:

* '''{{w|SI prefixes}}''', which can be applied to the beginning of a unit's name to multiply or divide the unit by powers of 10 or 1,000. This is standard for units like meters and grams, but is rarely applied to measurements of time other than when a unit of less than one second is needed, most commonly in various fields of science and engineering such as physics and electronics.
* The '''{{w|Gettysburg Address}}''', a famous speech delivered by U.S. president Abraham Lincoln in 1863, where he began by referring to the signing of the Declaration of Independence taking place "four score and seven years ago". A score is a dated term for the number 20, so "four score and seven" is equivalent to 87.
* A '''dog year''' is traditionally considered to be one-seventh the length of a normal human year, since a dog's overall lifespan is roughly one-seventh of a typical human's. The comic applies this to other units of time, such as minutes and months, each of which is also one-seventh the length of the standard unit. The number 7 (traditionally a "lucky number") is also used in many of the numbers quoted in the calendar.
* Other comparative durations of time that are not normally or usefully applied to day-length multiples. At the top end, there is the age of the universe, at the other there is {{w|Planck units#Planck time|Planck-time}} – with entire durations of periods of human history and the time needed to watch popular TV/film franchises in-between – most of which require a non-trivial multiplier or divisor to bring them to the necessary scale required.
* A '''{{w|baker's dozen}}''' is 13, or one more than a normal dozen. Here, the "baker's" prefix can be applied to any unit by adding an extra one of its constituent parts, like an extra hour added to a day.
* '''{{w|Irrational numbers}}''' like {{w|pi}} (3.14159...), {{w|Euler's number}} or ''e'' (2.71828...), the {{w|golden ratio}} (1.61803...), and the {{w|square root of 2}} (1.41421...). These are all interesting numbers because of their mathematical properties, but very impractical to use as arbitrary measurements of time because they have an endless series of non-repeating decimal digits.
* The teenage dating game '''{{w|Seven minutes in heaven}}'''.
* Rotation and revolution periods of various planets and moons in the Solar System.

{| class="wikitable"
|-
! Days left !! Date !! Duration specified !! Duration in days !! Explanation
|-
| 83 || Jun 22 || πe millidecades || 82.03 days || π ≈ 3.14159, e ≈ 2.718, so πe is about 22.459. A millidecade is 1/1000 decade, or 1/100 year, or 3.652425 days. Multiplying these results in 82.03 days. This is a play on {{w|Euler's identity}}, eiπ=-1, but raising pi to the power of e instead.
|-
| 82 || Jun 23 || 7 megaseconds || 81.02 days || 7,000,000 seconds
|-
| 81 || Jun 24 || e lunar months || 80.27 days || A lunar month ≈ 29.53059 days, e ≈ 2.718
|-
| 80 || Jun 25 || 60 rotations of Foucault's pendulum in Paris || 79.67 days || '''{{w|Paris}}''' is the capital city of '''{{w|France}}''' and it's located at a latitude of 48º 51' 23" N. '''{{w|Foucault's pendulum}}''' is a device conceived by French physicist '''{{w|Léon Foucault}}''', consisting of a pendulum that is free to rotate its plane of oscillation. When placed in a rotating '''{{w|Non-inertial reference frame}}''' such as the '''{{w|Earth}}''', that has an associated rotation period of 24 hours, the oscillation plane of Foucault's pendulum rotates at a rate determined by the Earth's period and the angle between the rotation axis of the frame of reference and the direction of its elongation in resting position, i.e. its latitude, with a period T = T🜨/sin(λ), being T🜨 Earth's period and λ the latitude of the pendulum. Historically, Léon Foucault performed this experiment in the city of Paris, most famously (although not for the first time, which happened at the '''{{w|Paris Observatory}}''') under the dome of the '''{{w|Panthéon}}''', to demonstrate Earth's rotation. At this latitude, Foucault's pendulum completes a full rotation every 31.8 hours.
|-
| 79 || Jun 26 || 8 milligenerations || 78.89 days || A generation is in general 22-33 years, with a reasonable mid-point of 27; and 8 x 0.001 (milli) x 365.2425 (accounting for leap years) x 27 ≈ 78.89 days
|-
| 78 || Jun 27 || 777,777 dog minutes || 77.16 days || A popular myth is that dogs age 7 times faster than humans, so 1 dog minute equals 1/7 human minutes.
|-
| 77 || Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads) || 77+ days || 7! = 7x6x5x4x3x2x1 = 5040. The standard episode of ''Jeopardy'' is 22-26 minutes, skipping ads. At 22 minutes each, the total is 110880 minutes, or exactly 77 days.
|-
| 76 || Jun 29 || 5,000 repeats of ''99 Bottles of Beer'' || 76.39 days || Each verse of {{w|99 Bottles of Beer}} is "''N'' bottles of beer on the wall, ''N'' bottles of beer. Take one down, pass it around, ''N-1'' bottles of beer on the wall." The entire song contains 99 verses. Randall apparently sings this rather slowly at around 72 bpm, taking about 13 seconds per verse.
|-
| 75 || Jun 30 || 5 baker's fortnights || 75 days || A {{w|baker's dozen}} is a dozen (12) plus 1 extra item. Randall has generalized this to adding 1 to any unit. A fortnight is 2 weeks, so a baker's fortnight is 15 days. 5x15 is 75 days.
|-
| 74 || Jul 1 || √2 dog years || 73.79 days || See day 78 (Jun 27)
|-
| 73 || Jul 2 || π millivics (1/1000th of Queen Victoria's reign) || 72.97 days || {{w|Queen Victoria}} ruled between 20 June 1837 and 22 January 1901 (23,226 days).
|-
| 72 || Jul 3 || 42 drives from NYC to LA (Google Maps estimate) || 71.75 days || According to Google Maps, the drive from New York City to Los Angeles via I-80 W (2789 miles or 4489 km) takes 41 hours.
|-
| 71 || Jul 4 || 1,000 viewings of ''Groundhog Day''|| 70.14 days || Using {{w|Groundhog Day (film)|Groundhog Day's}} 101-minute run time.
|-
| 70 || Jul 5 || 100,000 minutes || 69.44 days ||
|-
| 69 || Jul 6 || 1/10th of Martian year || 68.70 Earth days || Martian sidereal and tropical years both round to 687.0 Earth days
|-
| 68 || Jul 7 || 1,234,567 sound-miles || 67.63 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 67.6349058 days.
|-
| 67 || Jul 8 || 2πe seconds || 66.74 days || 2^(π^e) = 5,766,073 seconds
|-
| 66 || Jul 9 || 216 beats (Swatch Internet Time) || 65.54 days || A "{{w|.beat}}" is equal to 1/1000 day.
|-
| 65 || Jul 10 || 1,000 ISS orbits || 64.58 days || Each orbit of the ISS takes 90-93 minutes. Here a value of 93 minutes is used.
|-
| 64 || Jul 11 || Five hundred twenty five thousand (base seven) minutes|| 62.88 days || This refers to {{w|radix}}-7 arithmetic: 525,0007 minutes = 90,55210 minutes. Also references the opening and recurring line "Five hundred twenty five thousand six hundred minutes" from {{w|Seasons of Love}}, a song from the musical {{w|Rent (musical)|''Rent''}}, which is also referenced in [[1047: Approximations]]. "base seven" has the same rhythm as "six hundred".
|-
| 63 || Jul 12 || 1050 Planck times || 62.38 days || 10^50 x 5.39 x 10^-44 seconds
|-
| 62 || Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)|| 62.50 days || {{w|The Office (British TV series)|''The Office''}} was originally a {{w|BBC}} television show which had no commercial breaks, but Randall is obviously more familiar with the {{w|The Office (American TV series)|US version}}. This US "half-hour" comedy format contains 22.5 minutes of content (including the title sequence) and 7.5 minutes of ads. 
|-
| 61 || Jul 14 || Four score and seven kilominutes || 60.42 days || 87 x 1000 minutes
|-
| 60 || Jul 15 || 2 lunar months || 59.06 days || There are a number of different ways to define the {{w|lunar month}}. The most common is the synodic month, because it relates to the phases of the moon, and it's approximately 29.53 days.
|-
| 59 || Jul 16 || Half a day on Venus || 58.375 days || A Venus synodic day is 116 days 18 hours.
|-
| 58 || Jul 17 || 5 megaseconds || 57.87 days || 5,000,000 seconds
|-
| 57 || Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature) || 57.21 days || 5222 years &times 30 × 10-6. The 3200 BCE date is consistent with the approximate date of pre-Sumerian proto-writing given in Wikipedia's article on the {{w|history of writing}}.
|-
| 56 || Jul 19 || 1,000 viewings of ''Run Lola Run'' || 55.57 days || Using {{w|Run Lola Run|the movie's}} run time of 80 minutes.
|-
| 55 || Jul 20 || One million sound-miles || 54.78 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 54.7843137 days.
|-
| 54 || Jul 21 || 30 Ionian months || 53.07 days || Orbital period of Io around Jupiter is approximately 1.77 days.
|-
| 53 || Jul 22 || One dog year || 52.18 days || See day 78 (Jun 27)
|-
| 52 || Jul 23 || 60 viewings of ''Star Wars Episodes I-IX'' || 51.75 days || According to [https://dorksideoftheforce.com/2021/05/04/how-long-to-watch-every-star-wars-movie/ Fansided] the combined running times are 20 hours 42 minutes.
|-
| 51 || Jul 24 || 1/100,000,000,000th of the universe's age || 50.40 days || The universe is estimated to be about 13.8 billion years old.
|-
| 50 || Jul 25 || 5 milli-generations || 49.3 days || See day 79 (Jun 26)
|-
| 49 || Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven'' || 48.61 days || {{w|Seven minutes in heaven}} is an Anglo-culture teenager game, occuring in several movies. 10,000 minutes in Heaven is almost a week of making out (or doing whatever in a broom closet), so this game is unlikely.
|-
| 48 || Jul 27 || φeπ minutes || 47.62 days || 68,567.57 minutes
|-
| 47 || Jul 28 || 4 megaseconds || 46.30 days || 4,000,000 seconds
|-
| 46 || Jul 29 || 216 minutes || 45.51 days || 65,536 minutes
|-
| 45 || Jul 30 || eee seconds || 44.15 days || 3,814,279.10 seconds
|-
| 44 || Jul 31 || π fortnights|| 43.98 days || 3.14159 x 14 days
|-
| 43 || Aug 1 || One devil's spacewalk (666 orbits of the ISS) || 43.01 days || See day 65 (Jul 10). 666 is the {{w|number of the beast}}.
|-
| 42 || Aug 2 || 1 kilowatt-hour per watt || 41.66 days || 1000 hours
|-
| 41 || Aug 3 || eπ Ionian months || 40.94 days || Orbital period of Io around Jupiter is 1.769137786 days
|-
| 40 || Aug 4 || 30 rotations of Foucault's pendulum in Paris || 39.84 days || Refer to Day 80 (Jun 25)
|-
| 39 || Aug 5 || e fortnights || 38.06 days ||2.71828 x 14 days
|-
| 38 || Aug 6 || πe baker's days (25 hours) || 37.98 days || See day 75 (Jun 30)
|-
| 37 || Aug 7 || One deciyear || 36.52 days || One tenth of one year
|-
| 36 || Aug 8 || 7! milliweeks || 35.28 days || 5040 × 0.001 weeks
|-
| 35 || Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music || 34.72 days || ''Think'' is the music played while the contestants try to answer the Final Jeopardy question; it is 30 seconds long.
|-
| 34 || Aug 10 || 1000 basketball games (game time) || 33.33 days || Uses the NBA game time of four 12-minute quarters, or 48 minutes
|-
| 33 || Aug 11 || 777 hours || 32.38 days ||
|-
| 32 || Aug 12 || One millilincoln (1/1000 of fourscore and seven years) || 31.78 days || {{w|Abraham Lincoln}}'s {{w|Gettysburg Address}} begins with the famous phrase "Four score and seven years ago". 1 score = twenty. 
|-
| 31 || Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads) || 31.25 days || Uses a television 'hour' containing 45 minutes of content and 15 minutes of ads
|-
| 30 || Aug 14 || All of ''Star Trek'', consecutively || 27.16* days || As per [https://redshirtsalwaysdie.com/2021/01/22/take-far-longer-watch-star-trek-think/ RedShirtsAlwaysDie.com] of January 22, 2021. *Note well: dozens of additional ''Star Trek'' franchise episodes have been produced since, and more are presently scheduled to be released through June, July, and August, so this value is somewhat indeterminate over the scope of the countdown.
|-
| 29 || Aug 15 || 777,777 nanocenturies || 28.41 days || 777,777 × 10-9 × 100 years
|-
| 28 || Aug 16 || One sidereal lunar month || 27.3 days || The time it takes moon to return to the same position relative to the fixed stars
|-
| 27 || Aug 17 || 6 dog months || 26.1 days || See day 78 (Jun 27)
|-
| 26 || Aug 18 || ππ kilominutes || 25.32 days || 36,462.16 minutes
|-
| 25 || Aug 19 || 7 games of 7! minutes in Heaven || 24.5 days || 7 x 5040 (7 {{w|Factorial}}) minutes. See also day 49 (Jul 26).
|-
| 24 || Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy || 23.82 days || ''The Fellowship of the Ring'' extended version is 208 minutes, ''The Two Towers'' is 226 minutes, and ''The Return of the King'' is 252 minutes for its e.v., according to [https://fictionhorizon.com/how-long-are-all-the-lord-of-the-rings-and-the-hobbit-movies-combined/ FictionHorizon.com]
|-
| 23 || Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times || 22.21 days || See day 72 (Jul 3). This is for 6 round-trips and 1 one-way trip.
|-
| 22 || Aug 22 || ''It's a Small World'' sung at 1/10,000th speed || 21.18 days || {{w|It's a Small World}} is a song that was composed for the attraction of the same name at various {{w|Disney}} theme parks, and plays continuously at them in various languages.
|-
| 21 || Aug 23 || 500 hours || 20.83 days ||
|-
| 20 || Aug 24 || √2 fortnights || 19.80 days || 1.4142 × 14 days
|-
| 19 || Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles || 18.94 days || {{w|Vanessa Carlton}} is an American singer, and {{w|A Thousand Miles}} is her most successful song. Randall estimates her walking speed at about 2.2 miles/hour.
|-
| 18 || Aug 26 || 100,000 breaths || 15 seconds per breath for 17 days || Normal respiratory rate for adults is typically 12-20 breaths per minute, or about 3-4 seconds each. Randall may be a practitioner of "[https://www.frontiersin.org/articles/10.3389/fnhum.2018.00353/full slow breathing.]"
|-
| 17 || Aug 27 || √2 megaseconds || 16.37 days || 1.4142 × 1,000,000 seconds
|-
| 16 || Aug 28 || πππ πcoseconds || 15.51 days || 1.3402 × 1018 picoseconds (i.e., 10-12 seconds), making a joke how the mathematical "pi" is written with the character "π"
|-
| 15 || Aug 29 || One baker's fortnight (15 days) || 15 days || See day 75 (Jun 30)
|-
| 14 || Aug 30 || One baker's dozen (13) baker's days (25 hours) || 13.54 days || 325 hours; see day 75 (Jun 30)
|-
| 13 || Aug 31 || 300 hours || 12.5 days ||
|-
| 12 || Sep 1 || One million seconds || 11.57 days ||
|-
| 11 || Sep 2 || One nonstop bike ride from NYC to LA || 10.54 days || Google maps estimates the trip at 253 hours
|-
| 10 || Sep 3 || 1⁄1,000th of a generation || 9.86 days || See day 79 (Jun 26)
|-
| 9 || Sep 4 || 777,777 seconds || 9.002 days ||
|-
| 8 || Sep 5 || 100 viewings of ''Groundhog Day'' || 7.01 days || See Day 71 (Jul 4).
|-
| 7 || Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven) || 6.04 days || 8,700 minutes
|-
| 6 || Sep 7 || One pico-universe-lifetime || 5.04 days || See Day 51 (Jul 24)
|-
| 5 || Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks || 4.63 days || The chorus lasts about 8 seconds per 'person'
|-
| 4 || Sep 9 || One centiyear || 3.65 days || 365.24 days/100
|-
| 3 || Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times || 2.79 days || Based on a length of 4 minutes, 1 second
|-
| 2 || Sep 11 || ''Speed'' (1994) played at one frame per second || 1.9 days || {{w|Speed (1994 film)}} has runtime of 116 minutes = 6,960 seconds = 167,040 film frames at standard frame rate of 24 frames/second
|-
| 1 || Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1) || 0.76 days || Each iteration contains ''N'' verses. ''N + N-1 + N-2 ... + 1'' equals ''N * (N+1) / 2'', so 99 recursions = 4950 verses. Using the same 13-second (72 bpm) rate as Jun 29, this is close to 18 hours. Probably refers to Donald Knuth's article {{w|The Complexity of Songs}}.
|-
| 0 || Sep 13 || ''What If? 2'' release day || N/A ||
|}

The title text refers to the recursive time period on Sep 12. If you don't stop when you reach N=0 bottles, the repetition never ends, so that time interval becomes infinite. He likens it to {{w|The Song That Never Ends}}, another repetitive children's song, which is specifically intended to go on forever. The difference is that the Beer song has a natural stopping point at 0, while ''The Song That Never Ends'' is completely repetitive.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

Large heading: Countdown to ''What if? 2''

Subheading: (Preorder at [https://xkcd.com/whatif2 xkcd.com/whatif2] to get it at the end of the countdown)

Remainder of comic is a calendar with the date in one corner of each day's box.

{| class="wikitable"
|-
! Date !! Description
|-
| Jun 22 || πe millidecades
|-
| Jun 23 || 7 megaseconds
|-
| Jun 24 || e lunar months
|-
| Jun 25 || 60 rotations of Foucault's pendulum in Paris
|-
| Jun 26 || 8 milligenerations
|-
| Jun 27 || 777,777 dog minutes
|-
| Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads)
|-
| Jun 29 || 5,000 repeats of ''99 Bottles of Beer''
|-
| Jun 30 || 5 baker's fortnights (15 days)
|-
| Jul 1 || √2 dog years
|-
| Jul 2 || π millivics (1/1000th of Queen Victoria's reign)
|-
| Jul 3 || 42 drives from NYC to LA (Google Maps estimate)
|-
| Jul 4 || 1,000 viewings of ''Groundhog Day''
|-
| Jul 5 || 100,000 minutes
|-
| Jul 6 || 1/10th of Martian year
|-
| Jul 7 || 1,234,567 sound-miles
|-
| Jul 8 || 2πe seconds
|-
| Jul 9 || 216 beats (Swatch Internet Time)
|-
| Jul 10 || 1,000 ISS orbits
|-
| Jul 11 || Five hundred twenty five thousand (base seven) minutes (text preceded by several drawn musical notes)
|-
| Jul 12 || 1050 Planck times
|-
| Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)
|-
| Jul 14 || Four score and seven kilominutes
|-
| Jul 15 || 2 lunar months
|-
| Jul 16 || Half a day on Venus
|-
| Jul 17 || 5 megaseconds
|-
| Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature)
|-
| Jul 19 || 1,000 viewings of ''Run Lola Run''
|-
| Jul 20 || One million sound-miles
|-
| Jul 21 || 30 Ionian months
|-
| Jul 22 || One dog year
|-
| Jul 23 || 60 viewings of ''Star Wars Episodes I-IX''
|-
| Jul 24 || 1/100,000,000,000th of the universe's age
|-
| Jul 25 || 5 milli-generations
|-
| Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven''
|-
| Jul 27 || φeπ minutes
|-
| Jul 28 || 4 megaseconds
|-
| Jul 29 || 216 minutes
|-
| Jul 30 || eee seconds
|-
| Jul 31 || π fortnights
|-
| Aug 1 || one devil's spacewalk (666 orbits of the ISS)
|-
| Aug 2 || 1 kilowatt-hour per watt
|-
| Aug 3 || eπ Ionian months
|-
| Aug 4 || 30 rotations of Foucault's pendulum in Paris
|-
| Aug 5 || e fortnights
|-
| Aug 6 || πe baker's days (25 hours)
|-
| Aug 7 || one deciyear
|-
| Aug 8 || 7! milliweeks
|-
| Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music
|-
| Aug 10 || 1000 basketball games (game time)
|-
| Aug 11 || 777 hours
|-
| Aug 12 || one millilincoln (1/1000 of fourscore and seven years)
|-
| Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads)
|-
| Aug 14 || All of ''Star Trek'', consecutively
|-
| Aug 15 || 777,777 nanocenturies
|-
| Aug 16 || one sidereal lunar month
|-
| Aug 17 || 6 dog months
|-
| Aug 18 || ππ kilominutes
|-
| Aug 19 || 7 games of ''7! minutes in Heaven''
|-
| Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy
|-
| Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times
|-
| Aug 22 || ''It's a Small World'' sung at 1/10,000th speed
|-
| Aug 23 || 500 hours
|-
| Aug 24 || √2 fortnights
|-
| Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles
|-
| Aug 26 || 100,000 breaths
|-
| Aug 27 || √2 megaseconds
|-
| Aug 28 || πππ πcoseconds
|-
| Aug 29 || One baker's fortnight (15 days)
|-
| Aug 30 || One baker's dozen (13) baker's days (25 hours)
|-
| Aug 31 || 300 hours
|-
| Sep 1 || One million seconds
|-
| Sep 2 || One nonstop bike ride from NYC to LA
|-
| Sep 3 || 1⁄1,000th of a generation
|-
| Sep 4 || 777,777 seconds
|-
| Sep 5 || 100 viewings of ''Groundhog Day''
|-
| Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven)
|-
| Sep 7 || One pico-universe-lifetime
|-
| Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks
|-
| Sep 9 || One centiyear
|-
| Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times
|-
| Sep 11 || ''Speed'' (1994) played at one frame per second
|-
| Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1)
|-
| Sep 13 || ''What If? 2'' release day
|}
{{comic discussion}}
[[Category:Book promotion]]
[[Category:Comics featuring real people]]
[[Category:Songs]]
[[Category:Animals]]

2636: What If? 2 Countdown

2022-06-24T20:07:46Z

162.158.166.183: /* Explanation */ or, this could be an error, perish the thought. Weird that Wikipedia doesn't have anything remotely similar.

{{comic
| number = 2636
| date = June 22, 2022
| title = What If? 2 Countdown
| image = what_if_2_countdown.png
| titletext = If you don't end the 99 Bottles of Beer recursion at N=0 it just becomes The Other Song That Never Ends.
}}

==Explanation==
{{incomplete|Created by FOUR SCORE AND 7 BOTTLES OF BEER ON THE WALL - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
This comic takes the idea of {{w|Advent calendar}}s, and takes it to the extreme. It uses rather absurd and/or obscure ways to measure the amount of time until [[Randall]]'s new book ''What if? 2'' is released, with esoteric units or esoteric numbers. And often both.

Some concepts that appear several times throughout the calendar are:

* '''{{w|SI prefixes}}''', which can be applied to the beginning of a unit's name to multiply or divide the unit by powers of 10 or 1,000. This is standard for units like meters and grams, but is rarely applied to measurements of time other than when a unit of less than one second is needed, most commonly in various fields of science and engineering such as physics and electronics.
* The '''{{w|Gettysburg Address}}''', a famous speech delivered by U.S. president Abraham Lincoln in 1863, where he began by referring to the signing of the Declaration of Independence taking place "four score and seven years ago". A score is a dated term for the number 20, so "four score and seven" is equivalent to 87.
* A '''dog year''' is traditionally considered to be one-seventh the length of a normal human year, since a dog's overall lifespan is roughly one-seventh of a typical human's. The comic applies this to other units of time, such as minutes and months, each of which is also one-seventh the length of the standard unit. The number 7 (traditionally a "lucky number") is also used in many of the numbers quoted in the calendar.
* Other comparative durations of time that are not normally or usefully applied to day-length multiples. At the top end, there is the age of the universe, at the other there is {{w|Planck units#Planck time|Planck-time}} – with entire durations of periods of human history and the time needed to watch popular TV/film franchises in-between – most of which require a non-trivial multiplier or divisor to bring them to the necessary scale required.
* A '''{{w|baker's dozen}}''' is 13, or one more than a normal dozen. Here, the "baker's" prefix can be applied to any unit by adding an extra one of its constituent parts, like an extra hour added to a day.
* '''{{w|Irrational numbers}}''' like {{w|pi}} (3.14159...), {{w|Euler's number}} or ''e'' (2.71828...), the {{w|golden ratio}} (1.61803...), and the {{w|square root of 2}} (1.41421...). These are all interesting numbers because of their mathematical properties, but very impractical to use as arbitrary measurements of time because they have an endless series of non-repeating decimal digits.
* The teenage dating game '''{{w|Seven minutes in heaven}}'''.
* Rotation and revolution periods of various planets and moons in the Solar System.

{| class="wikitable"
|-
! Days left !! Date !! Duration specified !! Duration in days !! Explanation
|-
| 83 || Jun 22 || πe millidecades || 82.03 days || π ≈ 3.14159, e ≈ 2.718, so πe is about 22.459. A millidecade is 1/1000 decade, or 1/100 year, or 3.652425 days. Multiplying these results in 82.03 days. This is a play on {{w|Euler's identity}}, eiπ=-1, but raising pi to the power of e instead.
|-
| 82 || Jun 23 || 7 megaseconds || 81.02 days || 7,000,000 seconds
|-
| 81 || Jun 24 || e lunar months || 80.27 days || A lunar month ≈ 29.53059 days, e ≈ 2.718
|-
| 80 || Jun 25 || 60 rotations of Foucault's pendulum in Paris || 79.67 days || '''{{w|Paris}}''' is the capital city of '''{{w|France}}''' and it's located at a latitude of 48º 51' 23" N. '''{{w|Foucault's pendulum}}''' is a device conceived by French physicist '''{{w|Léon Foucault}}''', consisting of a pendulum that is free to rotate its plane of oscillation. When placed in a rotating '''{{w|Non-inertial reference frame}}''' such as the '''{{w|Earth}}''', that has an associated rotation period of 24 hours, the oscillation plane of Foucault's pendulum rotates at a rate determined by the Earth's period and the angle between the rotation axis of the frame of reference and the direction of its elongation in resting position, i.e. its latitude, with a period T = T🜨/sin(λ), being T🜨 Earth's period and λ the latitude of the pendulum. Historically, Léon Foucault performed this experiment in the city of Paris, most famously (although not for the first time, which happened at the '''{{w|Paris Observatory}}''') under the dome of the '''{{w|Panthéon}}''', to demonstrate Earth's rotation. At this latitude, Foucault's pendulum completes a full rotation every 31.8 hours.
|-
| 79 || Jun 26 || 8 milligenerations || 78.89 days || A generation is in general 22-33 years, with a reasonable mid-point of 27; and 8 x 0.001 (milli) x 365.2425 (accounting for leap years) x 27 ≈ 78.89 days
|-
| 78 || Jun 27 || 777,777 dog minutes || 77.16 days || A popular myth is that dogs age 7 times faster than humans, so 1 dog minute equals 1/7 human minutes.
|-
| 77 || Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads) || 77+ days || 7! = 7x6x5x4x3x2x1 = 5040. The standard episode of ''Jeopardy'' is 22-26 minutes, skipping ads. At 22 minutes each, the total is 110880 minutes, or exactly 77 days.
|-
| 76 || Jun 29 || 5,000 repeats of ''99 Bottles of Beer'' || 76.39 days || Each verse of {{w|99 Bottles of Beer}} is "''N'' bottles of beer on the wall, ''N'' bottles of beer. Take one down, pass it around, ''N-1'' bottles of beer on the wall." The entire song contains 99 verses. Randall apparently sings this rather slowly at around 72 bpm, taking about 13 seconds per verse.
|-
| 75 || Jun 30 || 5 baker's fortnights || 75 days || A {{w|baker's dozen}} is a dozen (12) plus 1 extra item. Randall has generalized this to adding 1 to any unit. A fortnight is 2 weeks, so a baker's fortnight is 15 days. 5x15 is 75 days.
|-
| 74 || Jul 1 || √2 dog years || 73.79 days || See day 78 (Jun 27)
|-
| 73 || Jul 2 || π millivics (1/1000th of Queen Victoria's reign) || 72.97 days || {{w|Queen Victoria}} ruled between 20 June 1837 and 22 January 1901 (23,226 days).
|-
| 72 || Jul 3 || 42 drives from NYC to LA (Google Maps estimate) || 71.75 days || According to Google Maps, the drive from New York City to Los Angeles via I-80 W (2789 miles or 4489 km) takes 41 hours.
|-
| 71 || Jul 4 || 1,000 viewings of ''Groundhog Day''|| 70.14 days || Using {{w|Groundhog Day (film)|Groundhog Day's}} 101-minute run time.
|-
| 70 || Jul 5 || 100,000 minutes || 69.44 days ||
|-
| 69 || Jul 6 || 1/10th of Martian year || 68.70 Earth days || Martian sidereal and tropical years both round to 687.0 Earth days
|-
| 68 || Jul 7 || 1,234,567 sound-miles || 67.63 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 67.6349058 days.
|-
| 67 || Jul 8 || 2πe seconds || 66.74 days || 2^(π^e) = 5,766,073 seconds
|-
| 66 || Jul 9 || 216 beats (Swatch Internet Time) || 65.54 days || A "{{w|.beat}}" is equal to 1/1000 day.
|-
| 65 || Jul 10 || 1,000 ISS orbits || 64.58 days || Each orbit of the ISS takes 90-93 minutes. Here a value of 93 minutes is used.
|-
| 64 || Jul 11 || Five hundred twenty five thousand (base seven) minutes|| 62.88 days || This refers to {{w|radix}}-7 arithmetic: 525,0007 minutes = 90,55210 minutes. Also references the opening and recurring line "Five hundred twenty five thousand six hundred minutes" from {{w|Seasons of Love}}, a song from the musical {{w|Rent (musical)|''Rent''}}, which is also referenced in [[1047: Approximations]]. "base seven" has the same rhythm as "six hundred".
|-
| 63 || Jul 12 || 1050 Planck times || 62.38 days || 10^50 x 5.39 x 10^-44 seconds
|-
| 62 || Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)|| 62.50 days || {{w|The Office (British TV series)|''The Office''}} was originally a {{w|BBC}} television show which had no commercial breaks, but Randall is obviously more familiar with the {{w|The Office (American TV series)|US version}}. This US "half-hour" comedy format contains 22.5 minutes of content (including the title sequence) and 7.5 minutes of ads. 
|-
| 61 || Jul 14 || Four score and seven kilominutes || 60.42 days || 87 x 1000 minutes
|-
| 60 || Jul 15 || 2 lunar months || 59.06 days || There are a number of different ways to define the {{w|lunar month}}. The most common is the synodic month, because it relates to the phases of the moon, and it's approximately 29.53 days.
|-
| 59 || Jul 16 || Half a day on Venus || 58.375 days || A Venus synodic day is 116 days 18 hours.
|-
| 58 || Jul 17 || 5 megaseconds || 57.87 days || 5,000,000 seconds
|-
| 57 || Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature) || 4681~4763 years × 10-6 || Randall is stating that "literature" was invented approximately 2700 BCE. This is consistent with the earliest surviving coherent Sumerian texts, but the earliest proto-writing likely developed at least 500 years earlier according to {{w|History of writing}}.
|-
| 56 || Jul 19 || 1,000 viewings of ''Run Lola Run'' || 55.57 days || Using {{w|Run Lola Run|the movie's}} run time of 80 minutes.
|-
| 55 || Jul 20 || One million sound-miles || 54.78 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 54.7843137 days.
|-
| 54 || Jul 21 || 30 Ionian months || 53.07 days || Orbital period of Io around Jupiter is approximately 1.77 days.
|-
| 53 || Jul 22 || One dog year || 52.18 days || See day 78 (Jun 27)
|-
| 52 || Jul 23 || 60 viewings of ''Star Wars Episodes I-IX'' || 51.75 days || According to [https://dorksideoftheforce.com/2021/05/04/how-long-to-watch-every-star-wars-movie/ Fansided] the combined running times are 20 hours 42 minutes.
|-
| 51 || Jul 24 || 1/100,000,000,000th of the universe's age || 50.40 days || The universe is estimated to be about 13.8 billion years old.
|-
| 50 || Jul 25 || 5 milli-generations || 49.3 days || See day 79 (Jun 26)
|-
| 49 || Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven'' || 48.61 days || {{w|Seven minutes in heaven}} is an Anglo-culture teenager game, occuring in several movies. 10,000 minutes in Heaven is almost a week of making out (or doing whatever in a broom closet), so this game is unlikely.
|-
| 48 || Jul 27 || φeπ minutes || 47.62 days || 68,567.57 minutes
|-
| 47 || Jul 28 || 4 megaseconds || 46.30 days || 4,000,000 seconds
|-
| 46 || Jul 29 || 216 minutes || 45.51 days || 65,536 minutes
|-
| 45 || Jul 30 || eee seconds || 44.15 days || 3,814,279.10 seconds
|-
| 44 || Jul 31 || π fortnights|| 43.98 days || 3.14159 x 14 days
|-
| 43 || Aug 1 || One devil's spacewalk (666 orbits of the ISS) || 43.01 days || See day 65 (Jul 10). 666 is the {{w|number of the beast}}.
|-
| 42 || Aug 2 || 1 kilowatt-hour per watt || 41.66 days || 1000 hours
|-
| 41 || Aug 3 || eπ Ionian months || 40.94 days || Orbital period of Io around Jupiter is 1.769137786 days
|-
| 40 || Aug 4 || 30 rotations of Foucault's pendulum in Paris || 39.84 days || Refer to Day 80 (Jun 25)
|-
| 39 || Aug 5 || e fortnights || 38.06 days ||2.71828 x 14 days
|-
| 38 || Aug 6 || πe baker's days (25 hours) || 37.98 days || See day 75 (Jun 30)
|-
| 37 || Aug 7 || One deciyear || 36.52 days || One tenth of one year
|-
| 36 || Aug 8 || 7! milliweeks || 35.28 days || 5040 × 0.001 weeks
|-
| 35 || Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music || 34.72 days || ''Think'' is the music played while the contestants try to answer the Final Jeopardy question; it is 30 seconds long.
|-
| 34 || Aug 10 || 1000 basketball games (game time) || 33.33 days || Uses the NBA game time of four 12-minute quarters, or 48 minutes
|-
| 33 || Aug 11 || 777 hours || 32.38 days ||
|-
| 32 || Aug 12 || One millilincoln (1/1000 of fourscore and seven years) || 31.78 days || {{w|Abraham Lincoln}}'s {{w|Gettysburg Address}} begins with the famous phrase "Four score and seven years ago". 1 score = twenty. 
|-
| 31 || Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads) || 31.25 days || Uses a television 'hour' containing 45 minutes of content and 15 minutes of ads
|-
| 30 || Aug 14 || All of ''Star Trek'', consecutively || 27.16* days || As per [https://redshirtsalwaysdie.com/2021/01/22/take-far-longer-watch-star-trek-think/ RedShirtsAlwaysDie.com] of January 22, 2021. *Note well: dozens of additional ''Star Trek'' franchise episodes have been produced since, and more are presently scheduled to be released through June, July, and August, so this value is somewhat indeterminate over the scope of the countdown.
|-
| 29 || Aug 15 || 777,777 nanocenturies || 28.41 days || 777,777 × 10-9 × 100 years
|-
| 28 || Aug 16 || One sidereal lunar month || 27.3 days || The time it takes moon to return to the same position relative to the fixed stars
|-
| 27 || Aug 17 || 6 dog months || 26.1 days || See day 78 (Jun 27)
|-
| 26 || Aug 18 || ππ kilominutes || 25.32 days || 36,462.16 minutes
|-
| 25 || Aug 19 || 7 games of 7! minutes in Heaven || 24.5 days || 7 x 5040 (7 {{w|Factorial}}) minutes. See also day 49 (Jul 26).
|-
| 24 || Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy || 23.82 days || ''The Fellowship of the Ring'' extended version is 208 minutes, ''The Two Towers'' is 226 minutes, and ''The Return of the King'' is 252 minutes for its e.v., according to [https://fictionhorizon.com/how-long-are-all-the-lord-of-the-rings-and-the-hobbit-movies-combined/ FictionHorizon.com]
|-
| 23 || Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times || 22.21 days || See day 72 (Jul 3). This is for 6 round-trips and 1 one-way trip.
|-
| 22 || Aug 22 || ''It's a Small World'' sung at 1/10,000th speed || 21.18 days || {{w|It's a Small World}} is a song that was composed for the attraction of the same name at various {{w|Disney}} theme parks, and plays continuously at them in various languages.
|-
| 21 || Aug 23 || 500 hours || 20.83 days ||
|-
| 20 || Aug 24 || √2 fortnights || 19.80 days || 1.4142 × 14 days
|-
| 19 || Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles || 18.94 days || {{w|Vanessa Carlton}} is an American singer, and {{w|A Thousand Miles}} is her most successful song. Randall estimates her walking speed at about 2.2 miles/hour.
|-
| 18 || Aug 26 || 100,000 breaths || 15 seconds per breath for 17 days || Normal respiratory rate for adults is typically 12-20 breaths per minute, or about 3-4 seconds each. Randall may be a practitioner of "[https://www.frontiersin.org/articles/10.3389/fnhum.2018.00353/full slow breathing.]"
|-
| 17 || Aug 27 || √2 megaseconds || 16.37 days || 1.4142 × 1,000,000 seconds
|-
| 16 || Aug 28 || πππ πcoseconds || 15.51 days || 1.3402 × 1018 picoseconds (i.e., 10-12 seconds), making a joke how the mathematical "pi" is written with the character "π"
|-
| 15 || Aug 29 || One baker's fortnight (15 days) || 15 days || See day 75 (Jun 30)
|-
| 14 || Aug 30 || One baker's dozen (13) baker's days (25 hours) || 13.54 days || 325 hours; see day 75 (Jun 30)
|-
| 13 || Aug 31 || 300 hours || 12.5 days ||
|-
| 12 || Sep 1 || One million seconds || 11.57 days ||
|-
| 11 || Sep 2 || One nonstop bike ride from NYC to LA || 10.54 days || Google maps estimates the trip at 253 hours
|-
| 10 || Sep 3 || 1⁄1,000th of a generation || 9.86 days || See day 79 (Jun 26)
|-
| 9 || Sep 4 || 777,777 seconds || 9.002 days ||
|-
| 8 || Sep 5 || 100 viewings of ''Groundhog Day'' || 7.01 days || See Day 71 (Jul 4).
|-
| 7 || Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven) || 6.04 days || 8,700 minutes
|-
| 6 || Sep 7 || One pico-universe-lifetime || 5.04 days || See Day 51 (Jul 24)
|-
| 5 || Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks || 4.63 days || The chorus lasts about 8 seconds per 'person'
|-
| 4 || Sep 9 || One centiyear || 3.65 days || 365.24 days/100
|-
| 3 || Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times || 2.79 days || Based on a length of 4 minutes, 1 second
|-
| 2 || Sep 11 || ''Speed'' (1994) played at one frame per second || 1.9 days || {{w|Speed (1994 film)}} has runtime of 116 minutes = 6,960 seconds = 167,040 film frames at standard frame rate of 24 frames/second
|-
| 1 || Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1) || 0.76 days || Each iteration contains ''N'' verses. ''N + N-1 + N-2 ... + 1'' equals ''N * (N+1) / 2'', so 99 recursions = 4950 verses. Using the same 13-second (72 bpm) rate as Jun 29, this is close to 18 hours. Probably refers to Donald Knuth's article {{w|The Complexity of Songs}}.
|-
| 0 || Sep 13 || ''What If? 2'' release day || N/A ||
|}

The title text refers to the recursive time period on Sep 12. If you don't stop when you reach N=0 bottles, the repetition never ends, so that time interval becomes infinite. He likens it to {{w|The Song That Never Ends}}, another repetitive children's song, which is specifically intended to go on forever. The difference is that the Beer song has a natural stopping point at 0, while ''The Song That Never Ends'' is completely repetitive.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

Large heading: Countdown to ''What if? 2''

Subheading: (Preorder at [https://xkcd.com/whatif2 xkcd.com/whatif2] to get it at the end of the countdown)

Remainder of comic is a calendar with the date in one corner of each day's box.

{| class="wikitable"
|-
! Date !! Description
|-
| Jun 22 || πe millidecades
|-
| Jun 23 || 7 megaseconds
|-
| Jun 24 || e lunar months
|-
| Jun 25 || 60 rotations of Foucault's pendulum in Paris
|-
| Jun 26 || 8 milligenerations
|-
| Jun 27 || 777,777 dog minutes
|-
| Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads)
|-
| Jun 29 || 5,000 repeats of ''99 Bottles of Beer''
|-
| Jun 30 || 5 baker's fortnights (15 days)
|-
| Jul 1 || √2 dog years
|-
| Jul 2 || π millivics (1/1000th of Queen Victoria's reign)
|-
| Jul 3 || 42 drives from NYC to LA (Google Maps estimate)
|-
| Jul 4 || 1,000 viewings of ''Groundhog Day''
|-
| Jul 5 || 100,000 minutes
|-
| Jul 6 || 1/10th of Martian year
|-
| Jul 7 || 1,234,567 sound-miles
|-
| Jul 8 || 2πe seconds
|-
| Jul 9 || 216 beats (Swatch Internet Time)
|-
| Jul 10 || 1,000 ISS orbits
|-
| Jul 11 || Five hundred twenty five thousand (base seven) minutes (text preceded by several drawn musical notes)
|-
| Jul 12 || 1050 Planck times
|-
| Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)
|-
| Jul 14 || Four score and seven kilominutes
|-
| Jul 15 || 2 lunar months
|-
| Jul 16 || Half a day on Venus
|-
| Jul 17 || 5 megaseconds
|-
| Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature)
|-
| Jul 19 || 1,000 viewings of ''Run Lola Run''
|-
| Jul 20 || One million sound-miles
|-
| Jul 21 || 30 Ionian months
|-
| Jul 22 || One dog year
|-
| Jul 23 || 60 viewings of ''Star Wars Episodes I-IX''
|-
| Jul 24 || 1/100,000,000,000th of the universe's age
|-
| Jul 25 || 5 milli-generations
|-
| Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven''
|-
| Jul 27 || φeπ minutes
|-
| Jul 28 || 4 megaseconds
|-
| Jul 29 || 216 minutes
|-
| Jul 30 || eee seconds
|-
| Jul 31 || π fortnights
|-
| Aug 1 || one devil's spacewalk (666 orbits of the ISS)
|-
| Aug 2 || 1 kilowatt-hour per watt
|-
| Aug 3 || eπ Ionian months
|-
| Aug 4 || 30 rotations of Foucault's pendulum in Paris
|-
| Aug 5 || e fortnights
|-
| Aug 6 || πe baker's days (25 hours)
|-
| Aug 7 || one deciyear
|-
| Aug 8 || 7! milliweeks
|-
| Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music
|-
| Aug 10 || 1000 basketball games (game time)
|-
| Aug 11 || 777 hours
|-
| Aug 12 || one millilincoln (1/1000 of fourscore and seven years)
|-
| Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads)
|-
| Aug 14 || All of ''Star Trek'', consecutively
|-
| Aug 15 || 777,777 nanocenturies
|-
| Aug 16 || one sidereal lunar month
|-
| Aug 17 || 6 dog months
|-
| Aug 18 || ππ kilominutes
|-
| Aug 19 || 7 games of ''7! minutes in Heaven''
|-
| Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy
|-
| Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times
|-
| Aug 22 || ''It's a Small World'' sung at 1/10,000th speed
|-
| Aug 23 || 500 hours
|-
| Aug 24 || √2 fortnights
|-
| Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles
|-
| Aug 26 || 100,000 breaths
|-
| Aug 27 || √2 megaseconds
|-
| Aug 28 || πππ πcoseconds
|-
| Aug 29 || One baker's fortnight (15 days)
|-
| Aug 30 || One baker's dozen (13) baker's days (25 hours)
|-
| Aug 31 || 300 hours
|-
| Sep 1 || One million seconds
|-
| Sep 2 || One nonstop bike ride from NYC to LA
|-
| Sep 3 || 1⁄1,000th of a generation
|-
| Sep 4 || 777,777 seconds
|-
| Sep 5 || 100 viewings of ''Groundhog Day''
|-
| Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven)
|-
| Sep 7 || One pico-universe-lifetime
|-
| Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks
|-
| Sep 9 || One centiyear
|-
| Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times
|-
| Sep 11 || ''Speed'' (1994) played at one frame per second
|-
| Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1)
|-
| Sep 13 || ''What If? 2'' release day
|}
{{comic discussion}}
[[Category:Book promotion]]
[[Category:Comics featuring real people]]
[[Category:Songs]]
[[Category:Animals]]

2636: What If? 2 Countdown

2022-06-24T20:03:31Z

162.158.166.183: /* Explanation */ underscores are unnecessary in Wikipedia links

{{comic
| number = 2636
| date = June 22, 2022
| title = What If? 2 Countdown
| image = what_if_2_countdown.png
| titletext = If you don't end the 99 Bottles of Beer recursion at N=0 it just becomes The Other Song That Never Ends.
}}

==Explanation==
{{incomplete|Created by FOUR SCORE AND 7 BOTTLES OF BEER ON THE WALL - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
This comic takes the idea of {{w|Advent calendar}}s, and takes it to the extreme. It uses rather absurd and/or obscure ways to measure the amount of time until [[Randall]]'s new book ''What if? 2'' is released, with esoteric units or esoteric numbers. And often both.

Some concepts that appear several times throughout the calendar are:

* '''{{w|SI prefixes}}''', which can be applied to the beginning of a unit's name to multiply or divide the unit by powers of 10 or 1,000. This is standard for units like meters and grams, but is rarely applied to measurements of time other than when a unit of less than one second is needed, most commonly in various fields of science and engineering such as physics and electronics.
* The '''{{w|Gettysburg Address}}''', a famous speech delivered by U.S. president Abraham Lincoln in 1863, where he began by referring to the signing of the Declaration of Independence taking place "four score and seven years ago". A score is a dated term for the number 20, so "four score and seven" is equivalent to 87.
* A '''dog year''' is traditionally considered to be one-seventh the length of a normal human year, since a dog's overall lifespan is roughly one-seventh of a typical human's. The comic applies this to other units of time, such as minutes and months, each of which is also one-seventh the length of the standard unit. The number 7 (traditionally a "lucky number") is also used in many of the numbers quoted in the calendar.
* Other comparative durations of time that are not normally or usefully applied to day-length multiples. At the top end, there is the age of the universe, at the other there is {{w|Planck units#Planck time|Planck-time}} – with entire durations of periods of human history and the time needed to watch popular TV/film franchises in-between – most of which require a non-trivial multiplier or divisor to bring them to the necessary scale required.
* A '''{{w|baker's dozen}}''' is 13, or one more than a normal dozen. Here, the "baker's" prefix can be applied to any unit by adding an extra one of its constituent parts, like an extra hour added to a day.
* '''{{w|Irrational numbers}}''' like {{w|pi}} (3.14159...), {{w|Euler's number}} or ''e'' (2.71828...), the {{w|golden ratio}} (1.61803...), and the {{w|square root of 2}} (1.41421...). These are all interesting numbers because of their mathematical properties, but very impractical to use as arbitrary measurements of time because they have an endless series of non-repeating decimal digits.
* The teenage dating game '''{{w|Seven minutes in heaven}}'''.
* Rotation and revolution periods of various planets and moons in the Solar System.

{| class="wikitable"
|-
! Days left !! Date !! Duration specified !! Duration in days !! Explanation
|-
| 83 || Jun 22 || πe millidecades || 82.03 days || π ≈ 3.14159, e ≈ 2.718, so πe is about 22.459. A millidecade is 1/1000 decade, or 1/100 year, or 3.652425 days. Multiplying these results in 82.03 days. This is a play on {{w|Euler's identity}}, eiπ=-1, but raising pi to the power of e instead.
|-
| 82 || Jun 23 || 7 megaseconds || 81.02 days || 7,000,000 seconds
|-
| 81 || Jun 24 || e lunar months || 80.27 days || A lunar month ≈ 29.53059 days, e ≈ 2.718
|-
| 80 || Jun 25 || 60 rotations of Foucault's pendulum in Paris || 79.67 days || '''{{w|Paris}}''' is the capital city of '''{{w|France}}''' and it's located at a latitude of 48º 51' 23" N. '''{{w|Foucault's pendulum}}''' is a device conceived by French physicist '''{{w|Léon Foucault}}''', consisting of a pendulum that is free to rotate its plane of oscillation. When placed in a rotating '''{{w|Non-inertial reference frame}}''' such as the '''{{w|Earth}}''', that has an associated rotation period of 24 hours, the oscillation plane of Foucault's pendulum rotates at a rate determined by the Earth's period and the angle between the rotation axis of the frame of reference and the direction of its elongation in resting position, i.e. its latitude, with a period T = T🜨/sin(λ), being T🜨 Earth's period and λ the latitude of the pendulum. Historically, Léon Foucault performed this experiment in the city of Paris, most famously (although not for the first time, which happened at the '''{{w|Paris Observatory}}''') under the dome of the '''{{w|Panthéon}}''', to demonstrate Earth's rotation. At this latitude, Foucault's pendulum completes a full rotation every 31.8 hours.
|-
| 79 || Jun 26 || 8 milligenerations || 78.89 days || A generation is in general 22-33 years, with a reasonable mid-point of 27; and 8 x 0.001 (milli) x 365.2425 (accounting for leap years) x 27 ≈ 78.89 days
|-
| 78 || Jun 27 || 777,777 dog minutes || 77.16 days || A popular myth is that dogs age 7 times faster than humans, so 1 dog minute equals 1/7 human minutes.
|-
| 77 || Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads) || 77+ days || 7! = 7x6x5x4x3x2x1 = 5040. The standard episode of ''Jeopardy'' is 22-26 minutes, skipping ads. At 22 minutes each, the total is 110880 minutes, or exactly 77 days.
|-
| 76 || Jun 29 || 5,000 repeats of ''99 Bottles of Beer'' || 76.39 days || Each verse of {{w|99 Bottles of Beer}} is "''N'' bottles of beer on the wall, ''N'' bottles of beer. Take one down, pass it around, ''N-1'' bottles of beer on the wall." The entire song contains 99 verses. Randall apparently sings this rather slowly at around 72 bpm, taking about 13 seconds per verse.
|-
| 75 || Jun 30 || 5 baker's fortnights || 75 days || A {{w|baker's dozen}} is a dozen (12) plus 1 extra item. Randall has generalized this to adding 1 to any unit. A fortnight is 2 weeks, so a baker's fortnight is 15 days. 5x15 is 75 days.
|-
| 74 || Jul 1 || √2 dog years || 73.79 days || See day 78 (Jun 27)
|-
| 73 || Jul 2 || π millivics (1/1000th of Queen Victoria's reign) || 72.97 days || {{w|Queen Victoria}} ruled between 20 June 1837 and 22 January 1901 (23,226 days).
|-
| 72 || Jul 3 || 42 drives from NYC to LA (Google Maps estimate) || 71.75 days || According to Google Maps, the drive from New York City to Los Angeles via I-80 W (2789 miles or 4489 km) takes 41 hours.
|-
| 71 || Jul 4 || 1,000 viewings of ''Groundhog Day''|| 70.14 days || Using {{w|Groundhog Day (film)|Groundhog Day's}} 101-minute run time.
|-
| 70 || Jul 5 || 100,000 minutes || 69.44 days ||
|-
| 69 || Jul 6 || 1/10th of Martian year || 68.70 Earth days || Martian sidereal and tropical years both round to 687.0 Earth days
|-
| 68 || Jul 7 || 1,234,567 sound-miles || 67.63 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 67.6349058 days.
|-
| 67 || Jul 8 || 2πe seconds || 66.74 days || 2^(π^e) = 5,766,073 seconds
|-
| 66 || Jul 9 || 216 beats (Swatch Internet Time) || 65.54 days || A "{{w|.beat}}" is equal to 1/1000 day.
|-
| 65 || Jul 10 || 1,000 ISS orbits || 64.58 days || Each orbit of the ISS takes 90-93 minutes. Here a value of 93 minutes is used.
|-
| 64 || Jul 11 || Five hundred twenty five thousand (base seven) minutes|| 62.88 days || This refers to {{w|radix}}-7 arithmetic: 525,0007 minutes = 90,55210 minutes. Also references the opening and recurring line "Five hundred twenty five thousand six hundred minutes" from {{w|Seasons of Love}}, a song from the musical {{w|Rent (musical)|''Rent''}}, which is also referenced in [[1047: Approximations]]. "base seven" has the same rhythm as "six hundred".
|-
| 63 || Jul 12 || 1050 Planck times || 62.38 days || 10^50 x 5.39 x 10^-44 seconds
|-
| 62 || Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)|| 62.50 days || {{w|The Office (British TV series)|''The Office''}} was originally a {{w|BBC}} television show which had no commercial breaks, but Randall is obviously more familiar with the {{w|The Office (American TV series)|US version}}. This US "half-hour" comedy format contains 22.5 minutes of content (including the title sequence) and 7.5 minutes of ads. 
|-
| 61 || Jul 14 || Four score and seven kilominutes || 60.42 days || 87 x 1000 minutes
|-
| 60 || Jul 15 || 2 lunar months || 59.06 days || There are a number of different ways to define the {{w|lunar month}}. The most common is the synodic month, because it relates to the phases of the moon, and it's approximately 29.53 days.
|-
| 59 || Jul 16 || Half a day on Venus || 58.375 days || A Venus synodic day is 116 days 18 hours.
|-
| 58 || Jul 17 || 5 megaseconds || 57.87 days || 5,000,000 seconds
|-
| 57 || Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature) || 4681~4763 years × 10-6 || Randall is stating that "literature" was invented approximately 2700 BCE. This is consistent with the earliest surviving coherent Sumerian texts, but the earliest proto-writing likely developed at least 500 years earlier according to {{w|History of writing}}.
|-
| 56 || Jul 19 || 1,000 viewings of ''Run Lola Run'' || 55.57 days || Using {{w|Run Lola Run|the movie's}} run time of 80 minutes.
|-
| 55 || Jul 20 || One million sound-miles || 54.78 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 54.7843137 days.
|-
| 54 || Jul 21 || 30 Ionian months || 53.07 days || Orbital period of Io around Jupiter is approximately 1.77 days.
|-
| 53 || Jul 22 || One dog year || 52.18 days || See day 78 (Jun 27)
|-
| 52 || Jul 23 || 60 viewings of ''Star Wars Episodes I-IX'' || 51.75 days || According to [https://dorksideoftheforce.com/2021/05/04/how-long-to-watch-every-star-wars-movie/ Fansided] the combined running times are 20 hours 42 minutes.
|-
| 51 || Jul 24 || 1/100,000,000,000th of the universe's age || 50.40 days || The universe is estimated to be about 13.8 billion years old.
|-
| 50 || Jul 25 || 5 milli-generations || 49.3 days || See day 79 (Jun 26)
|-
| 49 || Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven'' || 48.61 days || {{w|Seven minutes in heaven}} is an Anglo-culture teenager game, occuring in several movies. 10,000 minutes in Heaven is almost a week of making out (or doing whatever in a broom closet), so this game is unlikely.
|-
| 48 || Jul 27 || φeπ minutes || 47.62 days || 68,567.57 minutes
|-
| 47 || Jul 28 || 4 megaseconds || 46.30 days || 4,000,000 seconds
|-
| 46 || Jul 29 || 216 minutes || 45.51 days || 65,536 minutes
|-
| 45 || Jul 30 || eee seconds || 44.15 days || 3,814,279.10 seconds
|-
| 44 || Jul 31 || π fortnights|| 43.98 days || 3.14159 x 14 days
|-
| 43 || Aug 1 || One devil's spacewalk (666 orbits of the ISS) || 43.01 days || See day 65 (Jul 10). 666 is the {{w|number of the beast}}.
|-
| 42 || Aug 2 || 1 kilowatt-hour per watt || 41.66 days || 1000 hours
|-
| 41 || Aug 3 || eπ Ionian months || 40.94 days || Orbital period of Io around Jupiter is 1.769137786 days
|-
| 40 || Aug 4 || 30 rotations of Foucault's pendulum in Paris || 39.84 days || Refer to Day 80 (Jun 25)
|-
| 39 || Aug 5 || e fortnights || 38.06 days ||2.71828 x 14 days
|-
| 38 || Aug 6 || πe baker's days (25 hours) || 37.98 days || See day 75 (Jun 30)
|-
| 37 || Aug 7 || One deciyear || 36.52 days || One tenth of one year
|-
| 36 || Aug 8 || 7! milliweeks || 35.28 days || 5040 × 0.001 weeks
|-
| 35 || Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music || 34.72 days || ''Think'' is the music played while the contestants try to answer the Final Jeopardy question; it is 30 seconds long.
|-
| 34 || Aug 10 || 1000 basketball games (game time) || 33.33 days || Uses the NBA game time of four 12-minute quarters, or 48 minutes
|-
| 33 || Aug 11 || 777 hours || 32.38 days ||
|-
| 32 || Aug 12 || One millilincoln (1/1000 of fourscore and seven years) || 31.78 days || {{w|Abraham Lincoln}}'s {{w|Gettysburg Address}} begins with the famous phrase "Four score and seven years ago". 1 score = twenty. 
|-
| 31 || Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads) || 31.25 days || Uses a television 'hour' containing 45 minutes of content and 15 minutes of ads
|-
| 30 || Aug 14 || All of ''Star Trek'', consecutively || 27.16* days || As per [https://redshirtsalwaysdie.com/2021/01/22/take-far-longer-watch-star-trek-think/ RedShirtsAlwaysDie.com] of January 22, 2021. *Note well: dozens of additional ''Star Trek'' franchise episodes have been produced since, and more are presently scheduled to be released through June, July, and August, so this value is somewhat indeterminate over the scope of the countdown.
|-
| 29 || Aug 15 || 777,777 nanocenturies || 28.41 days || 777,777 × 10-9 × 100 years
|-
| 28 || Aug 16 || One sidereal lunar month || 27.3 days || The time it takes moon to return to the same position relative to the fixed stars
|-
| 27 || Aug 17 || 6 dog months || 26.1 days || See day 78 (Jun 27)
|-
| 26 || Aug 18 || ππ kilominutes || 25.32 days || 36,462.16 minutes
|-
| 25 || Aug 19 || 7 games of 7! minutes in Heaven || 24.5 days || 7 x 5040 (7 {{w|Factorial}}) minutes. See also day 49 (Jul 26).
|-
| 24 || Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy || 23.82 days || ''The Fellowship of the Ring'' extended version is 208 minutes, ''The Two Towers'' is 226 minutes, and ''The Return of the King'' is 252 minutes for its e.v., according to [https://fictionhorizon.com/how-long-are-all-the-lord-of-the-rings-and-the-hobbit-movies-combined/ FictionHorizon.com]
|-
| 23 || Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times || 22.21 days || See day 72 (Jul 3). This is for 6 round-trips and 1 one-way trip.
|-
| 22 || Aug 22 || ''It's a Small World'' sung at 1/10,000th speed || 21.18 days || {{w|It's a Small World}} is a song that was composed for the attraction of the same name at various {{w|Disney}} theme parks, and plays continuously at them in various languages.
|-
| 21 || Aug 23 || 500 hours || 20.83 days ||
|-
| 20 || Aug 24 || √2 fortnights || 19.80 days || 1.4142 × 14 days
|-
| 19 || Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles || 18.94 days || {{w|Vanessa Carlton}} is an American singer, and {{w|A Thousand Miles}} is her most successful song. Randall estimates her walking speed at about 2.2 miles/hour.
|-
| 18 || Aug 26 || 100,000 breaths || 15 seconds per breath for 17 days || Normal respiratory rate for adults is typically 12-20 breaths per minute, or about 3-4 seconds each. Randall may be a practitioner of "slow breathing".
|-
| 17 || Aug 27 || √2 megaseconds || 16.37 days || 1.4142 × 1,000,000 seconds
|-
| 16 || Aug 28 || πππ πcoseconds || 15.51 days || 1.3402 × 1018 picoseconds (i.e., 10-12 seconds), making a joke how the mathematical "pi" is written with the character "π"
|-
| 15 || Aug 29 || One baker's fortnight (15 days) || 15 days || See day 75 (Jun 30)
|-
| 14 || Aug 30 || One baker's dozen (13) baker's days (25 hours) || 13.54 days || 325 hours; see day 75 (Jun 30)
|-
| 13 || Aug 31 || 300 hours || 12.5 days ||
|-
| 12 || Sep 1 || One million seconds || 11.57 days ||
|-
| 11 || Sep 2 || One nonstop bike ride from NYC to LA || 10.54 days || Google maps estimates the trip at 253 hours
|-
| 10 || Sep 3 || 1⁄1,000th of a generation || 9.86 days || See day 79 (Jun 26)
|-
| 9 || Sep 4 || 777,777 seconds || 9.002 days ||
|-
| 8 || Sep 5 || 100 viewings of ''Groundhog Day'' || 7.01 days || See Day 71 (Jul 4).
|-
| 7 || Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven) || 6.04 days || 8,700 minutes
|-
| 6 || Sep 7 || One pico-universe-lifetime || 5.04 days || See Day 51 (Jul 24)
|-
| 5 || Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks || 4.63 days || The chorus lasts about 8 seconds per 'person'
|-
| 4 || Sep 9 || One centiyear || 3.65 days || 365.24 days/100
|-
| 3 || Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times || 2.79 days || Based on a length of 4 minutes, 1 second
|-
| 2 || Sep 11 || ''Speed'' (1994) played at one frame per second || 1.9 days || {{w|Speed (1994 film)}} has runtime of 116 minutes = 6,960 seconds = 167,040 film frames at standard frame rate of 24 frames/second
|-
| 1 || Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1) || 0.76 days || Each iteration contains ''N'' verses. ''N + N-1 + N-2 ... + 1'' equals ''N * (N+1) / 2'', so 99 recursions = 4950 verses. Using the same 13-second (72 bpm) rate as Jun 29, this is close to 18 hours. Probably refers to Donald Knuth's article {{w|The Complexity of Songs}}.
|-
| 0 || Sep 13 || ''What If? 2'' release day || N/A ||
|}

The title text refers to the recursive time period on Sep 12. If you don't stop when you reach N=0 bottles, the repetition never ends, so that time interval becomes infinite. He likens it to {{w|The Song That Never Ends}}, another repetitive children's song, which is specifically intended to go on forever. The difference is that the Beer song has a natural stopping point at 0, while ''The Song That Never Ends'' is completely repetitive.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

Large heading: Countdown to ''What if? 2''

Subheading: (Preorder at [https://xkcd.com/whatif2 xkcd.com/whatif2] to get it at the end of the countdown)

Remainder of comic is a calendar with the date in one corner of each day's box.

{| class="wikitable"
|-
! Date !! Description
|-
| Jun 22 || πe millidecades
|-
| Jun 23 || 7 megaseconds
|-
| Jun 24 || e lunar months
|-
| Jun 25 || 60 rotations of Foucault's pendulum in Paris
|-
| Jun 26 || 8 milligenerations
|-
| Jun 27 || 777,777 dog minutes
|-
| Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads)
|-
| Jun 29 || 5,000 repeats of ''99 Bottles of Beer''
|-
| Jun 30 || 5 baker's fortnights (15 days)
|-
| Jul 1 || √2 dog years
|-
| Jul 2 || π millivics (1/1000th of Queen Victoria's reign)
|-
| Jul 3 || 42 drives from NYC to LA (Google Maps estimate)
|-
| Jul 4 || 1,000 viewings of ''Groundhog Day''
|-
| Jul 5 || 100,000 minutes
|-
| Jul 6 || 1/10th of Martian year
|-
| Jul 7 || 1,234,567 sound-miles
|-
| Jul 8 || 2πe seconds
|-
| Jul 9 || 216 beats (Swatch Internet Time)
|-
| Jul 10 || 1,000 ISS orbits
|-
| Jul 11 || Five hundred twenty five thousand (base seven) minutes (text preceded by several drawn musical notes)
|-
| Jul 12 || 1050 Planck times
|-
| Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)
|-
| Jul 14 || Four score and seven kilominutes
|-
| Jul 15 || 2 lunar months
|-
| Jul 16 || Half a day on Venus
|-
| Jul 17 || 5 megaseconds
|-
| Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature)
|-
| Jul 19 || 1,000 viewings of ''Run Lola Run''
|-
| Jul 20 || One million sound-miles
|-
| Jul 21 || 30 Ionian months
|-
| Jul 22 || One dog year
|-
| Jul 23 || 60 viewings of ''Star Wars Episodes I-IX''
|-
| Jul 24 || 1/100,000,000,000th of the universe's age
|-
| Jul 25 || 5 milli-generations
|-
| Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven''
|-
| Jul 27 || φeπ minutes
|-
| Jul 28 || 4 megaseconds
|-
| Jul 29 || 216 minutes
|-
| Jul 30 || eee seconds
|-
| Jul 31 || π fortnights
|-
| Aug 1 || one devil's spacewalk (666 orbits of the ISS)
|-
| Aug 2 || 1 kilowatt-hour per watt
|-
| Aug 3 || eπ Ionian months
|-
| Aug 4 || 30 rotations of Foucault's pendulum in Paris
|-
| Aug 5 || e fortnights
|-
| Aug 6 || πe baker's days (25 hours)
|-
| Aug 7 || one deciyear
|-
| Aug 8 || 7! milliweeks
|-
| Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music
|-
| Aug 10 || 1000 basketball games (game time)
|-
| Aug 11 || 777 hours
|-
| Aug 12 || one millilincoln (1/1000 of fourscore and seven years)
|-
| Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads)
|-
| Aug 14 || All of ''Star Trek'', consecutively
|-
| Aug 15 || 777,777 nanocenturies
|-
| Aug 16 || one sidereal lunar month
|-
| Aug 17 || 6 dog months
|-
| Aug 18 || ππ kilominutes
|-
| Aug 19 || 7 games of ''7! minutes in Heaven''
|-
| Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy
|-
| Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times
|-
| Aug 22 || ''It's a Small World'' sung at 1/10,000th speed
|-
| Aug 23 || 500 hours
|-
| Aug 24 || √2 fortnights
|-
| Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles
|-
| Aug 26 || 100,000 breaths
|-
| Aug 27 || √2 megaseconds
|-
| Aug 28 || πππ πcoseconds
|-
| Aug 29 || One baker's fortnight (15 days)
|-
| Aug 30 || One baker's dozen (13) baker's days (25 hours)
|-
| Aug 31 || 300 hours
|-
| Sep 1 || One million seconds
|-
| Sep 2 || One nonstop bike ride from NYC to LA
|-
| Sep 3 || 1⁄1,000th of a generation
|-
| Sep 4 || 777,777 seconds
|-
| Sep 5 || 100 viewings of ''Groundhog Day''
|-
| Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven)
|-
| Sep 7 || One pico-universe-lifetime
|-
| Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks
|-
| Sep 9 || One centiyear
|-
| Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times
|-
| Sep 11 || ''Speed'' (1994) played at one frame per second
|-
| Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1)
|-
| Sep 13 || ''What If? 2'' release day
|}
{{comic discussion}}
[[Category:Book promotion]]
[[Category:Comics featuring real people]]
[[Category:Songs]]
[[Category:Animals]]

2636: What If? 2 Countdown

2022-06-24T19:58:10Z

162.158.166.183: /* Explanation */ clarify

{{comic
| number = 2636
| date = June 22, 2022
| title = What If? 2 Countdown
| image = what_if_2_countdown.png
| titletext = If you don't end the 99 Bottles of Beer recursion at N=0 it just becomes The Other Song That Never Ends.
}}

==Explanation==
{{incomplete|Created by FOUR SCORE AND 7 BOTTLES OF BEER ON THE WALL - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
This comic takes the idea of {{w|Advent calendar}}s, and takes it to the extreme. It uses rather absurd and/or obscure ways to measure the amount of time until [[Randall]]'s new book ''What if? 2'' is released, with esoteric units or esoteric numbers. And often both.

Some concepts that appear several times throughout the calendar are:

* '''{{w|SI prefixes}}''', which can be applied to the beginning of a unit's name to multiply or divide the unit by powers of 10 or 1,000. This is standard for units like meters and grams, but is rarely applied to measurements of time other than when a unit of less than one second is needed, most commonly in various fields of science and engineering such as physics and electronics.
* The '''{{w|Gettysburg Address}}''', a famous speech delivered by U.S. president Abraham Lincoln in 1863, where he began by referring to the signing of the Declaration of Independence taking place "four score and seven years ago". A score is a dated term for the number 20, so "four score and seven" is equivalent to 87.
* A '''dog year''' is traditionally considered to be one-seventh the length of a normal human year, since a dog's overall lifespan is roughly one-seventh of a typical human's. The comic applies this to other units of time, such as minutes and months, each of which is also one-seventh the length of the standard unit. The number 7 (traditionally a "lucky number") is also used in many of the numbers quoted in the calendar.
* Other comparative durations of time that are not normally or usefully applied to day-length multiples. At the top end, there is the age of the universe, at the other there is {{w|Planck_units#Planck_time|Planck-time}} – with entire durations of periods of human history and the time needed to watch popular TV/film franchises in-between – most of which require a non-trivial multiplier or divisor to bring them to the necessary scale required.
* A '''{{w|baker's dozen}}''' is 13, or one more than a normal dozen. Here, the "baker's" prefix can be applied to any unit by adding an extra one of its constituent parts, like an extra hour added to a day.
* '''{{w|Irrational numbers}}''' like {{w|pi}} (3.14159...), {{w|Euler's number}} or ''e'' (2.71828...), the {{w|golden ratio}} (1.61803...), and the {{w|square root of 2}} (1.41421...). These are all interesting numbers because of their mathematical properties, but very impractical to use as arbitrary measurements of time because they have an endless series of non-repeating decimal digits.
* The teenage dating game '''{{w|Seven minutes in heaven}}'''.
* Rotation and revolution periods of various planets and moons in the Solar System.

{| class="wikitable"
|-
! Days left !! Date !! Duration specified !! Duration in days !! Explanation
|-
| 83 || Jun 22 || πe millidecades || 82.03 days || π ≈ 3.14159, e ≈ 2.718, so πe is about 22.459. A millidecade is 1/1000 decade, or 1/100 year, or 3.652425 days. Multiplying these results in 82.03 days. This is a play on {{w|Euler's identity}}, eiπ=-1, but raising pi to the power of e instead.
|-
| 82 || Jun 23 || 7 megaseconds || 81.02 days || 7,000,000 seconds
|-
| 81 || Jun 24 || e lunar months || 80.27 days || A lunar month ≈ 29.53059 days, e ≈ 2.718
|-
| 80 || Jun 25 || 60 rotations of Foucault's pendulum in Paris || 79.67 days || '''{{w|Paris}}''' is the capital city of '''{{w|France}}''' and it's located at a latitude of 48º 51' 23" N. '''{{w|Foucault's pendulum}}''' is a device conceived by French physicist '''{{w|Léon Foucault}}''', consisting of a pendulum that is free to rotate its plane of oscillation. When placed in a rotating '''{{w|Non-inertial reference frame}}''' such as the '''{{w|Earth}}''', that has an associated rotation period of 24 hours, the oscillation plane of Foucault's pendulum rotates at a rate determined by the Earth's period and the angle between the rotation axis of the frame of reference and the direction of its elongation in resting position, i.e. its latitude, with a period T = T🜨/sin(λ), being T🜨 Earth's period and λ the latitude of the pendulum. Historically, Léon Foucault performed this experiment in the city of Paris, most famously (although not for the first time, which happened at the '''{{w|Paris Observatory}}''') under the dome of the '''{{w|Panthéon}}''', to demonstrate Earth's rotation. At this latitude, Foucault's pendulum completes a full rotation every 31.8 hours.
|-
| 79 || Jun 26 || 8 milligenerations || 78.89 days || A generation is in general 22-33 years, with a reasonable mid-point of 27; and 8 x 0.001 (milli) x 365.2425 (accounting for leap years) x 27 ≈ 78.89 days
|-
| 78 || Jun 27 || 777,777 dog minutes || 77.16 days || A popular myth is that dogs age 7 times faster than humans, so 1 dog minute equals 1/7 human minutes.
|-
| 77 || Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads) || 77+ days || 7! = 7x6x5x4x3x2x1 = 5040. The standard episode of ''Jeopardy'' is 22-26 minutes, skipping ads. At 22 minutes each, the total is 110880 minutes, or exactly 77 days.
|-
| 76 || Jun 29 || 5,000 repeats of ''99 Bottles of Beer'' || 76.39 days || Each verse of {{w|99 Bottles of Beer}} is "''N'' bottles of beer on the wall, ''N'' bottles of beer. Take one down, pass it around, ''N-1'' bottles of beer on the wall." The entire song contains 99 verses. Randall apparently sings this rather slowly at around 72 bpm, taking about 13 seconds per verse.
|-
| 75 || Jun 30 || 5 baker's fortnights || 75 days || A {{w|baker's dozen}} is a dozen (12) plus 1 extra item. Randall has generalized this to adding 1 to any unit. A fortnight is 2 weeks, so a baker's fortnight is 15 days. 5x15 is 75 days.
|-
| 74 || Jul 1 || √2 dog years || 73.79 days || See day 78 (Jun 27)
|-
| 73 || Jul 2 || π millivics (1/1000th of Queen Victoria's reign) || 72.97 days || {{w|Queen Victoria}} ruled between 20 June 1837 and 22 January 1901 (23,226 days).
|-
| 72 || Jul 3 || 42 drives from NYC to LA (Google Maps estimate) || 71.75 days || According to Google Maps, the drive from New York City to Los Angeles via I-80 W (2789 miles or 4489 km) takes 41 hours.
|-
| 71 || Jul 4 || 1,000 viewings of ''Groundhog Day''|| 70.14 days || Using {{w|Groundhog Day (film)|Groundhog Day's}} 101-minute run time.
|-
| 70 || Jul 5 || 100,000 minutes || 69.44 days ||
|-
| 69 || Jul 6 || 1/10th of Martian year || 68.70 Earth days || Martian sidereal and tropical years both round to 687.0 Earth days
|-
| 68 || Jul 7 || 1,234,567 sound-miles || 67.63 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 67.6349058 days.
|-
| 67 || Jul 8 || 2πe seconds || 66.74 days || 2^(π^e) = 5,766,073 seconds
|-
| 66 || Jul 9 || 216 beats (Swatch Internet Time) || 65.54 days || A "{{w|.beat}}" is equal to 1/1000 day.
|-
| 65 || Jul 10 || 1,000 ISS orbits || 64.58 days || Each orbit of the ISS takes 90-93 minutes. Here a value of 93 minutes is used.
|-
| 64 || Jul 11 || Five hundred twenty five thousand (base seven) minutes|| 62.88 days || This refers to {{w|radix}}-7 arithmetic: 525,0007 minutes = 90,55210 minutes. Also references the opening and recurring line "Five hundred twenty five thousand six hundred minutes" from {{w|Seasons of Love}}, a song from the musical {{w|Rent (musical)|''Rent''}}, which is also referenced in [[1047: Approximations]]. "base seven" has the same rhythm as "six hundred".
|-
| 63 || Jul 12 || 1050 Planck times || 62.38 days || 10^50 x 5.39 x 10^-44 seconds
|-
| 62 || Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)|| 62.50 days || {{w|The Office (British TV series)|''The Office''}} was originally a {{w|BBC}} television show which had no commercial breaks, but Randall is obviously more familiar with the {{w|The_Office_(American_TV_series)|US version}}. This US "half-hour" comedy format contains 22.5 minutes of content (including the title sequence) and 7.5 minutes of ads. 
|-
| 61 || Jul 14 || Four score and seven kilominutes || 60.42 days || 87 x 1000 minutes
|-
| 60 || Jul 15 || 2 lunar months || 59.06 days || There are a number of different ways to define the {{w|lunar month}}. The most common is the synodic month, because it relates to the phases of the moon, and it's approximately 29.53 days.
|-
| 59 || Jul 16 || Half a day on Venus || 58.375 days || A Venus synodic day is 116 days 18 hours.
|-
| 58 || Jul 17 || 5 megaseconds || 57.87 days || 5,000,000 seconds
|-
| 57 || Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature) || 4681~4763 years × 10-6 || Randall is stating that "literature" was invented approximately 2700 BCE. This is consistent with the earliest surviving coherent Sumerian texts, but the earliest proto-writing likely developed at least 500 years earlier according to {{w|History of writing}}.
|-
| 56 || Jul 19 || 1,000 viewings of ''Run Lola Run'' || 55.57 days || Using {{w|Run Lola Run|the movie's}} run time of 80 minutes.
|-
| 55 || Jul 20 || One million sound-miles || 54.78 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 54.7843137 days.
|-
| 54 || Jul 21 || 30 Ionian months || 53.07 days || Orbital period of Io around Jupiter is approximately 1.77 days.
|-
| 53 || Jul 22 || One dog year || 52.18 days || See day 78 (Jun 27)
|-
| 52 || Jul 23 || 60 viewings of ''Star Wars Episodes I-IX'' || 51.75 days || According to [https://dorksideoftheforce.com/2021/05/04/how-long-to-watch-every-star-wars-movie/ Fansided] the combined running times are 20 hours 42 minutes.
|-
| 51 || Jul 24 || 1/100,000,000,000th of the universe's age || 50.40 days || The universe is estimated to be about 13.8 billion years old.
|-
| 50 || Jul 25 || 5 milli-generations || 49.3 days || See day 79 (Jun 26)
|-
| 49 || Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven'' || 48.61 days || {{w|Seven minutes in heaven}} is an Anglo-culture teenager game, occuring in several movies. 10,000 minutes in Heaven is almost a week of making out (or doing whatever in a broom closet), so this game is unlikely.
|-
| 48 || Jul 27 || φeπ minutes || 47.62 days || 68,567.57 minutes
|-
| 47 || Jul 28 || 4 megaseconds || 46.30 days || 4,000,000 seconds
|-
| 46 || Jul 29 || 216 minutes || 45.51 days || 65,536 minutes
|-
| 45 || Jul 30 || eee seconds || 44.15 days || 3,814,279.10 seconds
|-
| 44 || Jul 31 || π fortnights|| 43.98 days || 3.14159 x 14 days
|-
| 43 || Aug 1 || One devil's spacewalk (666 orbits of the ISS) || 43.01 days || See day 65 (Jul 10). 666 is the {{w|number of the beast}}.
|-
| 42 || Aug 2 || 1 kilowatt-hour per watt || 41.66 days || 1000 hours
|-
| 41 || Aug 3 || eπ Ionian months || 40.94 days || Orbital period of Io around Jupiter is 1.769137786 days
|-
| 40 || Aug 4 || 30 rotations of Foucault's pendulum in Paris || 39.84 days || Refer to Day 80 (Jun 25)
|-
| 39 || Aug 5 || e fortnights || 38.06 days ||2.71828 x 14 days
|-
| 38 || Aug 6 || πe baker's days (25 hours) || 37.98 days || See day 75 (Jun 30)
|-
| 37 || Aug 7 || One deciyear || 36.52 days || One tenth of one year
|-
| 36 || Aug 8 || 7! milliweeks || 35.28 days || 5040 × 0.001 weeks
|-
| 35 || Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music || 34.72 days || ''Think'' is the music played while the contestants try to answer the Final Jeopardy question; it is 30 seconds long.
|-
| 34 || Aug 10 || 1000 basketball games (game time) || 33.33 days || Uses the NBA game time of four 12-minute quarters, or 48 minutes
|-
| 33 || Aug 11 || 777 hours || 32.38 days ||
|-
| 32 || Aug 12 || One millilincoln (1/1000 of fourscore and seven years) || 31.78 days || {{w|Abraham Lincoln}}'s {{w|Gettysburg Address}} begins with the famous phrase "Four score and seven years ago". 1 score = twenty. 
|-
| 31 || Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads) || 31.25 days || Uses a television 'hour' containing 45 minutes of content and 15 minutes of ads
|-
| 30 || Aug 14 || All of ''Star Trek'', consecutively || 27.16* days || As per [https://redshirtsalwaysdie.com/2021/01/22/take-far-longer-watch-star-trek-think/ RedShirtsAlwaysDie.com] of January 22, 2021. *Note well: dozens of additional ''Star Trek'' franchise episodes have been produced since, and more are presently scheduled to be released through June, July, and August, so this value is somewhat indeterminate over the scope of the countdown.
|-
| 29 || Aug 15 || 777,777 nanocenturies || 28.41 days || 777,777 × 10-9 × 100 years
|-
| 28 || Aug 16 || One sidereal lunar month || 27.3 days || The time it takes moon to return to the same position relative to the fixed stars
|-
| 27 || Aug 17 || 6 dog months || 26.1 days || See day 78 (Jun 27)
|-
| 26 || Aug 18 || ππ kilominutes || 25.32 days || 36,462.16 minutes
|-
| 25 || Aug 19 || 7 games of 7! minutes in Heaven || 24.5 days || 7 x 5040 (7 {{w|Factorial}}) minutes. See also day 49 (Jul 26).
|-
| 24 || Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy || 23.82 days || ''The Fellowship of the Ring'' extended version is 208 minutes, ''The Two Towers'' is 226 minutes, and ''The Return of the King'' is 252 minutes for its e.v., according to [https://fictionhorizon.com/how-long-are-all-the-lord-of-the-rings-and-the-hobbit-movies-combined/ FictionHorizon.com]
|-
| 23 || Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times || 22.21 days || See day 72 (Jul 3). This is for 6 round-trips and 1 one-way trip.
|-
| 22 || Aug 22 || ''It's a Small World'' sung at 1/10,000th speed || 21.18 days || {{w|It's a Small World}} is a song that was composed for the attraction of the same name at various {{w|Disney}} theme parks, and plays continuously at them in various languages.
|-
| 21 || Aug 23 || 500 hours || 20.83 days ||
|-
| 20 || Aug 24 || √2 fortnights || 19.80 days || 1.4142 × 14 days
|-
| 19 || Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles || 18.94 days || {{w|Vanessa Carlton}} is an American singer, and {{w|A Thousand Miles}} is her most successful song. Randall estimates her walking speed at about 2.2 miles/hour.
|-
| 18 || Aug 26 || 100,000 breaths || 15 seconds per breath for 17 days || Normal respiratory rate for adults is typically 12-20 breaths per minute, or about 3-4 seconds each. Randall may be a practitioner of "slow breathing".
|-
| 17 || Aug 27 || √2 megaseconds || 16.37 days || 1.4142 × 1,000,000 seconds
|-
| 16 || Aug 28 || πππ πcoseconds || 15.51 days || 1.3402 × 1018 picoseconds (i.e., 10-12 seconds), making a joke how the mathematical "pi" is written with the character "π"
|-
| 15 || Aug 29 || One baker's fortnight (15 days) || 15 days || See day 75 (Jun 30)
|-
| 14 || Aug 30 || One baker's dozen (13) baker's days (25 hours) || 13.54 days || 325 hours; see day 75 (Jun 30)
|-
| 13 || Aug 31 || 300 hours || 12.5 days ||
|-
| 12 || Sep 1 || One million seconds || 11.57 days ||
|-
| 11 || Sep 2 || One nonstop bike ride from NYC to LA || 10.54 days || Google maps estimates the trip at 253 hours
|-
| 10 || Sep 3 || 1⁄1,000th of a generation || 9.86 days || See day 79 (Jun 26)
|-
| 9 || Sep 4 || 777,777 seconds || 9.002 days ||
|-
| 8 || Sep 5 || 100 viewings of ''Groundhog Day'' || 7.01 days || See Day 71 (Jul 4).
|-
| 7 || Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven) || 6.04 days || 8,700 minutes
|-
| 6 || Sep 7 || One pico-universe-lifetime || 5.04 days || See Day 51 (Jul 24)
|-
| 5 || Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks || 4.63 days || The chorus lasts about 8 seconds per 'person'
|-
| 4 || Sep 9 || One centiyear || 3.65 days || 365.24 days/100
|-
| 3 || Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times || 2.79 days || Based on a length of 4 minutes, 1 second
|-
| 2 || Sep 11 || ''Speed'' (1994) played at one frame per second || 1.9 days || {{w|Speed_(1994_film)}} has runtime of 116 minutes = 6,960 seconds = 167,040 film frames at standard frame rate of 24 frames/second
|-
| 1 || Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1) || 0.76 days || Each iteration contains ''N'' verses. ''N + N-1 + N-2 ... + 1'' equals ''N * (N+1) / 2'', so 99 recursions = 4950 verses. Using the same 13-second (72 bpm) rate as Jun 29, this is close to 18 hours. Probably refers to Donald Knuth's article {{w|The Complexity of Songs}}.
|-
| 0 || Sep 13 || ''What If? 2'' release day || N/A ||
|}

The title text refers to the recursive time period on Sep 12. If you don't stop when you reach N=0 bottles, the repetition never ends, so that time interval becomes infinite. He likens it to {{w|The Song That Never Ends}}, another repetitive children's song, which is specifically intended to go on forever. The difference is that the Beer song has a natural stopping point at 0, while ''The Song That Never Ends'' is completely repetitive.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

Large heading: Countdown to ''What if? 2''

Subheading: (Preorder at [https://xkcd.com/whatif2 xkcd.com/whatif2] to get it at the end of the countdown)

Remainder of comic is a calendar with the date in one corner of each day's box.

{| class="wikitable"
|-
! Date !! Description
|-
| Jun 22 || πe millidecades
|-
| Jun 23 || 7 megaseconds
|-
| Jun 24 || e lunar months
|-
| Jun 25 || 60 rotations of Foucault's pendulum in Paris
|-
| Jun 26 || 8 milligenerations
|-
| Jun 27 || 777,777 dog minutes
|-
| Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads)
|-
| Jun 29 || 5,000 repeats of ''99 Bottles of Beer''
|-
| Jun 30 || 5 baker's fortnights (15 days)
|-
| Jul 1 || √2 dog years
|-
| Jul 2 || π millivics (1/1000th of Queen Victoria's reign)
|-
| Jul 3 || 42 drives from NYC to LA (Google Maps estimate)
|-
| Jul 4 || 1,000 viewings of ''Groundhog Day''
|-
| Jul 5 || 100,000 minutes
|-
| Jul 6 || 1/10th of Martian year
|-
| Jul 7 || 1,234,567 sound-miles
|-
| Jul 8 || 2πe seconds
|-
| Jul 9 || 216 beats (Swatch Internet Time)
|-
| Jul 10 || 1,000 ISS orbits
|-
| Jul 11 || Five hundred twenty five thousand (base seven) minutes (text preceded by several drawn musical notes)
|-
| Jul 12 || 1050 Planck times
|-
| Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)
|-
| Jul 14 || Four score and seven kilominutes
|-
| Jul 15 || 2 lunar months
|-
| Jul 16 || Half a day on Venus
|-
| Jul 17 || 5 megaseconds
|-
| Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature)
|-
| Jul 19 || 1,000 viewings of ''Run Lola Run''
|-
| Jul 20 || One million sound-miles
|-
| Jul 21 || 30 Ionian months
|-
| Jul 22 || One dog year
|-
| Jul 23 || 60 viewings of ''Star Wars Episodes I-IX''
|-
| Jul 24 || 1/100,000,000,000th of the universe's age
|-
| Jul 25 || 5 milli-generations
|-
| Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven''
|-
| Jul 27 || φeπ minutes
|-
| Jul 28 || 4 megaseconds
|-
| Jul 29 || 216 minutes
|-
| Jul 30 || eee seconds
|-
| Jul 31 || π fortnights
|-
| Aug 1 || one devil's spacewalk (666 orbits of the ISS)
|-
| Aug 2 || 1 kilowatt-hour per watt
|-
| Aug 3 || eπ Ionian months
|-
| Aug 4 || 30 rotations of Foucault's pendulum in Paris
|-
| Aug 5 || e fortnights
|-
| Aug 6 || πe baker's days (25 hours)
|-
| Aug 7 || one deciyear
|-
| Aug 8 || 7! milliweeks
|-
| Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music
|-
| Aug 10 || 1000 basketball games (game time)
|-
| Aug 11 || 777 hours
|-
| Aug 12 || one millilincoln (1/1000 of fourscore and seven years)
|-
| Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads)
|-
| Aug 14 || All of ''Star Trek'', consecutively
|-
| Aug 15 || 777,777 nanocenturies
|-
| Aug 16 || one sidereal lunar month
|-
| Aug 17 || 6 dog months
|-
| Aug 18 || ππ kilominutes
|-
| Aug 19 || 7 games of ''7! minutes in Heaven''
|-
| Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy
|-
| Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times
|-
| Aug 22 || ''It's a Small World'' sung at 1/10,000th speed
|-
| Aug 23 || 500 hours
|-
| Aug 24 || √2 fortnights
|-
| Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles
|-
| Aug 26 || 100,000 breaths
|-
| Aug 27 || √2 megaseconds
|-
| Aug 28 || πππ πcoseconds
|-
| Aug 29 || One baker's fortnight (15 days)
|-
| Aug 30 || One baker's dozen (13) baker's days (25 hours)
|-
| Aug 31 || 300 hours
|-
| Sep 1 || One million seconds
|-
| Sep 2 || One nonstop bike ride from NYC to LA
|-
| Sep 3 || 1⁄1,000th of a generation
|-
| Sep 4 || 777,777 seconds
|-
| Sep 5 || 100 viewings of ''Groundhog Day''
|-
| Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven)
|-
| Sep 7 || One pico-universe-lifetime
|-
| Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks
|-
| Sep 9 || One centiyear
|-
| Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times
|-
| Sep 11 || ''Speed'' (1994) played at one frame per second
|-
| Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1)
|-
| Sep 13 || ''What If? 2'' release day
|}
{{comic discussion}}
[[Category:Book promotion]]
[[Category:Comics featuring real people]]
[[Category:Songs]]
[[Category:Animals]]

2636: What If? 2 Countdown

2022-06-24T19:57:09Z

162.158.166.183: /* Explanation */ clarify

{{comic
| number = 2636
| date = June 22, 2022
| title = What If? 2 Countdown
| image = what_if_2_countdown.png
| titletext = If you don't end the 99 Bottles of Beer recursion at N=0 it just becomes The Other Song That Never Ends.
}}

==Explanation==
{{incomplete|Created by FOUR SCORE AND 7 BOTTLES OF BEER ON THE WALL - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
This comic takes the idea of {{w|Advent calendar}}s, and takes it to the extreme. It uses rather absurd and/or obscure ways to measure the amount of time until [[Randall]]'s new book ''What if? 2'' is released, with esoteric units or esoteric numbers. And often both.

Some concepts that appear several times throughout the calendar are:

* '''{{w|SI prefixes}}''', which can be applied to the beginning of a unit's name to multiply or divide the unit by powers of 10 or 1,000. This is standard for units like meters and grams, but is rarely applied to measurements of time other than when a unit of less than one second is needed, most commonly in various fields of science and engineering such as physics and electronics.
* The '''{{w|Gettysburg Address}}''', a famous speech delivered by U.S. president Abraham Lincoln in 1863, where he began by referring to the signing of the Declaration of Independence taking place "four score and seven years ago". A score is a dated term for the number 20, so "four score and seven" is equivalent to 87.
* A '''dog year''' is traditionally considered to be one-seventh the length of a normal human year, since a dog's overall lifespan is roughly one-seventh of a typical human's. The comic applies this to other units of time, such as minutes and months, each of which is also one-seventh the length of the standard unit. The number 7 (traditionally a "lucky number") is also used in many of the numbers quoted in the calendar.
* Other comparative durations of time that are not normally or usefully applied to day-length multiples. At the top end, there is the age of the universe, at the other there is {{w|Planck_units#Planck_time|Planck-time}} – with entire durations of periods of human history and the time needed to watch popular TV/film franchises in-between – most of which require a non-trivial multiplier or divisor to bring them to the necessary scale required.
* A '''{{w|baker's dozen}}''' is 13, or one more than a normal dozen. Here, the "baker's" prefix can be applied to any unit by adding an extra one of its constituent parts, like an extra hour added to a day.
* '''{{w|Irrational numbers}}''' like {{w|pi}} (3.14159...), {{w|Euler's number}} or ''e'' (2.71828...), the {{w|golden ratio}} (1.61803...), and the {{w|square root of 2}} (1.41421...). These are all interesting numbers because of their mathematical properties, but very impractical to use as arbitrary measurements of time because they have an endless series of non-repeating decimal digits.
* The teenage dating game '''{{w|Seven minutes in heaven}}'''.
* Rotation and revolution periods of various planets and moons in the Solar System.

{| class="wikitable"
|-
! Days left !! Date !! Duration specified !! Duration in days !! Explanation
|-
| 83 || Jun 22 || πe millidecades || 82.03 days || π ≈ 3.14159, e ≈ 2.718, so πe is about 22.459. A millidecade is 1/1000 decade, or 1/100 year, or 3.652425 days. Multiplying these results in 82.03 days. This is a play on {{w|Euler's identity}}, eiπ=-1, but raising pi to the power of e instead.
|-
| 82 || Jun 23 || 7 megaseconds || 81.02 days || 7,000,000 seconds
|-
| 81 || Jun 24 || e lunar months || 80.27 days || A lunar month ≈ 29.53059 days, e ≈ 2.718
|-
| 80 || Jun 25 || 60 rotations of Foucault's pendulum in Paris || 79.67 days || '''{{w|Paris}}''' is the capital city of '''{{w|France}}''' and it's located at a latitude of 48º 51' 23" N. '''{{w|Foucault's pendulum}}''' is a device conceived by French physicist '''{{w|Léon Foucault}}''', consisting of a pendulum that is free to rotate its plane of oscillation. When placed in a rotating '''{{w|Non-inertial reference frame}}''' such as the '''{{w|Earth}}''', that has an associated rotation period of 24 hours, the oscillation plane of Foucault's pendulum rotates at a rate determined by the Earth's period and the angle between the rotation axis of the frame of reference and the direction of its elongation in resting position, i.e. its latitude, with a period T = T🜨/sin(λ), being T🜨 Earth's period and λ the latitude of the pendulum. Historically, Léon Foucault performed this experiment in the city of Paris, most famously (although not for the first time, which happened at the '''{{w|Paris Observatory}}''') under the dome of the '''{{w|Panthéon}}''', to demonstrate Earth's rotation. At this latitude, Foucault's pendulum completes a full rotation every 31.8 hours.
|-
| 79 || Jun 26 || 8 milligenerations || 78.89 days || A generation is in general 22-33 years, with a reasonable mid-point of 27; and 8 x 0.001 (milli) x 365.2425 (accounting for leap years) x 27 ≈ 78.89 days
|-
| 78 || Jun 27 || 777,777 dog minutes || 77.16 days || A popular myth is that dogs age 7 times faster than humans, so 1 dog minute equals 1/7 human minutes.
|-
| 77 || Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads) || 77+ days || 7! = 7x6x5x4x3x2x1 = 5040. The standard episode of ''Jeopardy'' is 22-26 minutes, skipping ads. At 22 minutes each, the total is 110880 minutes, or exactly 77 days.
|-
| 76 || Jun 29 || 5,000 repeats of ''99 Bottles of Beer'' || 76.39 days || Each verse of {{w|99 Bottles of Beer}} is "''N'' bottles of beer on the wall, ''N'' bottles of beer. Take one down, pass it around, ''N-1'' bottles of beer on the wall." The entire song contains 99 verses. Randall apparently sings this rather slowly at around 72 bpm, taking about 13 seconds per verse.
|-
| 75 || Jun 30 || 5 baker's fortnights || 75 days || A {{w|baker's dozen}} is a dozen (12) plus 1 extra item. Randall has generalized this to adding 1 to any unit. A fortnight is 2 weeks, so a baker's fortnight is 15 days. 5x15 is 75 days.
|-
| 74 || Jul 1 || √2 dog years || 73.79 days || See day 78 (Jun 27)
|-
| 73 || Jul 2 || π millivics (1/1000th of Queen Victoria's reign) || 72.97 days || {{w|Queen Victoria}} ruled between 20 June 1837 and 22 January 1901 (23,226 days).
|-
| 72 || Jul 3 || 42 drives from NYC to LA (Google Maps estimate) || 71.75 days || According to Google Maps, the drive from New York City to Los Angeles via I-80 W (2789 miles or 4489 km) takes 41 hours.
|-
| 71 || Jul 4 || 1,000 viewings of ''Groundhog Day''|| 70.14 days || Using {{w|Groundhog Day (film)|Groundhog Day's}} 101-minute run time.
|-
| 70 || Jul 5 || 100,000 minutes || 69.44 days ||
|-
| 69 || Jul 6 || 1/10th of Martian year || 68.70 Earth days || Martian sidereal and tropical years both round to 687.0 Earth days
|-
| 68 || Jul 7 || 1,234,567 sound-miles || 67.63 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 67.6349058 days.
|-
| 67 || Jul 8 || 2πe seconds || 66.74 days || 2^(π^e) = 5,766,073 seconds
|-
| 66 || Jul 9 || 216 beats (Swatch Internet Time) || 65.54 days || {{w|.beat}} is equal to 1/1000 day.
|-
| 65 || Jul 10 || 1,000 ISS orbits || 64.58 days || Each orbit of the ISS takes 90-93 minutes. Here a value of 93 minutes is used.
|-
| 64 || Jul 11 || Five hundred twenty five thousand (base seven) minutes|| 62.88 days || This refers to {{w|radix}}-7 arithmetic: 525,0007 minutes = 90,55210 minutes. Also references the opening and recurring line "Five hundred twenty five thousand six hundred minutes" from {{w|Seasons of Love}}, a song from the musical {{w|Rent (musical)|''Rent''}}, which is also referenced in [[1047: Approximations]]. "base seven" has the same rhythm as "six hundred".
|-
| 63 || Jul 12 || 1050 Planck times || 62.38 days || 10^50 x 5.39 x 10^-44 seconds
|-
| 62 || Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)|| 62.50 days || {{w|The Office (British TV series)|''The Office''}} was originally a {{w|BBC}} television show which had no commercial breaks, but Randall is obviously more familiar with the {{w|The_Office_(American_TV_series)|US version}}. This US "half-hour" comedy format contains 22.5 minutes of content (including the title sequence) and 7.5 minutes of ads. 
|-
| 61 || Jul 14 || Four score and seven kilominutes || 60.42 days || 87 x 1000 minutes
|-
| 60 || Jul 15 || 2 lunar months || 59.06 days || There are a number of different ways to define the {{w|lunar month}}. The most common is the synodic month, because it relates to the phases of the moon, and it's approximately 29.53 days.
|-
| 59 || Jul 16 || Half a day on Venus || 58.375 days || A Venus synodic day is 116 days 18 hours.
|-
| 58 || Jul 17 || 5 megaseconds || 57.87 days || 5,000,000 seconds
|-
| 57 || Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature) || 4681~4763 years × 10-6 || Randall is stating that "literature" was invented approximately 2700 BCE. This is consistent with the earliest surviving coherent Sumerian texts, but the earliest proto-writing likely developed at least 500 years earlier according to {{w|History of writing}}.
|-
| 56 || Jul 19 || 1,000 viewings of ''Run Lola Run'' || 55.57 days || Using {{w|Run Lola Run|the movie's}} run time of 80 minutes.
|-
| 55 || Jul 20 || One million sound-miles || 54.78 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 54.7843137 days.
|-
| 54 || Jul 21 || 30 Ionian months || 53.07 days || Orbital period of Io around Jupiter is approximately 1.77 days.
|-
| 53 || Jul 22 || One dog year || 52.18 days || See day 78 (Jun 27)
|-
| 52 || Jul 23 || 60 viewings of ''Star Wars Episodes I-IX'' || 51.75 days || According to [https://dorksideoftheforce.com/2021/05/04/how-long-to-watch-every-star-wars-movie/ Fansided] the combined running times are 20 hours 42 minutes.
|-
| 51 || Jul 24 || 1/100,000,000,000th of the universe's age || 50.40 days || The universe is estimated to be about 13.8 billion years old.
|-
| 50 || Jul 25 || 5 milli-generations || 49.3 days || See day 79 (Jun 26)
|-
| 49 || Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven'' || 48.61 days || {{w|Seven minutes in heaven}} is an Anglo-culture teenager game, occuring in several movies. 10,000 minutes in Heaven is almost a week of making out (or doing whatever in a broom closet), so this game is unlikely.
|-
| 48 || Jul 27 || φeπ minutes || 47.62 days || 68,567.57 minutes
|-
| 47 || Jul 28 || 4 megaseconds || 46.30 days || 4,000,000 seconds
|-
| 46 || Jul 29 || 216 minutes || 45.51 days || 65,536 minutes
|-
| 45 || Jul 30 || eee seconds || 44.15 days || 3,814,279.10 seconds
|-
| 44 || Jul 31 || π fortnights|| 43.98 days || 3.14159 x 14 days
|-
| 43 || Aug 1 || One devil's spacewalk (666 orbits of the ISS) || 43.01 days || See day 65 (Jul 10). 666 is the {{w|number of the beast}}.
|-
| 42 || Aug 2 || 1 kilowatt-hour per watt || 41.66 days || 1000 hours
|-
| 41 || Aug 3 || eπ Ionian months || 40.94 days || Orbital period of Io around Jupiter is 1.769137786 days
|-
| 40 || Aug 4 || 30 rotations of Foucault's pendulum in Paris || 39.84 days || Refer to Day 80 (Jun 25)
|-
| 39 || Aug 5 || e fortnights || 38.06 days ||2.71828 x 14 days
|-
| 38 || Aug 6 || πe baker's days (25 hours) || 37.98 days || See day 75 (Jun 30)
|-
| 37 || Aug 7 || One deciyear || 36.52 days || One tenth of one year
|-
| 36 || Aug 8 || 7! milliweeks || 35.28 days || 5040 × 0.001 weeks
|-
| 35 || Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music || 34.72 days || ''Think'' is the music played while the contestants try to answer the Final Jeopardy question; it is 30 seconds long.
|-
| 34 || Aug 10 || 1000 basketball games (game time) || 33.33 days || Uses the NBA game time of four 12-minute quarters, or 48 minutes
|-
| 33 || Aug 11 || 777 hours || 32.38 days ||
|-
| 32 || Aug 12 || One millilincoln (1/1000 of fourscore and seven years) || 31.78 days || {{w|Abraham Lincoln}}'s {{w|Gettysburg Address}} begins with the famous phrase "Four score and seven years ago". 1 score = twenty. 
|-
| 31 || Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads) || 31.25 days || Uses a television 'hour' containing 45 minutes of content and 15 minutes of ads
|-
| 30 || Aug 14 || All of ''Star Trek'', consecutively || 27.16* days || As per [https://redshirtsalwaysdie.com/2021/01/22/take-far-longer-watch-star-trek-think/ RedShirtsAlwaysDie.com] of January 22, 2021. *Note well: dozens of additional ''Star Trek'' franchise episodes have been produced since, and more are presently scheduled to be released through June, July, and August, so this value is somewhat indeterminate over the scope of the countdown.
|-
| 29 || Aug 15 || 777,777 nanocenturies || 28.41 days || 777,777 × 10-9 × 100 years
|-
| 28 || Aug 16 || One sidereal lunar month || 27.3 days || The time it takes moon to return to the same position relative to the fixed stars
|-
| 27 || Aug 17 || 6 dog months || 26.1 days || See day 78 (Jun 27)
|-
| 26 || Aug 18 || ππ kilominutes || 25.32 days || 36,462.16 minutes
|-
| 25 || Aug 19 || 7 games of 7! minutes in Heaven || 24.5 days || 7 x 5040 (7 {{w|Factorial}}) minutes. See also day 49 (Jul 26).
|-
| 24 || Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy || 23.82 days || ''The Fellowship of the Ring'' extended version is 208 minutes, ''The Two Towers'' is 226 minutes, and ''The Return of the King'' is 252 minutes for its e.v., according to [https://fictionhorizon.com/how-long-are-all-the-lord-of-the-rings-and-the-hobbit-movies-combined/ FictionHorizon.com]
|-
| 23 || Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times || 22.21 days || See day 72 (Jul 3). This is for 6 round-trips and 1 one-way trip.
|-
| 22 || Aug 22 || ''It's a Small World'' sung at 1/10,000th speed || 21.18 days || {{w|It's a Small World}} is a song that was composed for the attraction of the same name at various {{w|Disney}} theme parks, and plays continuously at them in various languages.
|-
| 21 || Aug 23 || 500 hours || 20.83 days ||
|-
| 20 || Aug 24 || √2 fortnights || 19.80 days || 1.4142 × 14 days
|-
| 19 || Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles || 18.94 days || {{w|Vanessa Carlton}} is an American singer, and {{w|A Thousand Miles}} is her most successful song. Randall estimates her walking speed at about 2.2 miles/hour.
|-
| 18 || Aug 26 || 100,000 breaths || 15 seconds per breath for 17 days || Normal respiratory rate for adults is typically 12-20 breaths per minute, or about 3-4 seconds each. Randall may be a practitioner of "slow breathing".
|-
| 17 || Aug 27 || √2 megaseconds || 16.37 days || 1.4142 × 1,000,000 seconds
|-
| 16 || Aug 28 || πππ πcoseconds || 15.51 days || 1.3402 × 1018 picoseconds (i.e., 10-12 seconds), making a joke how the mathematical "pi" is written with the character "π"
|-
| 15 || Aug 29 || One baker's fortnight (15 days) || 15 days || See day 75 (Jun 30)
|-
| 14 || Aug 30 || One baker's dozen (13) baker's days (25 hours) || 13.54 days || 325 hours; see day 75 (Jun 30)
|-
| 13 || Aug 31 || 300 hours || 12.5 days ||
|-
| 12 || Sep 1 || One million seconds || 11.57 days ||
|-
| 11 || Sep 2 || One nonstop bike ride from NYC to LA || 10.54 days || Google maps estimates the trip at 253 hours
|-
| 10 || Sep 3 || 1⁄1,000th of a generation || 9.86 days || See day 79 (Jun 26)
|-
| 9 || Sep 4 || 777,777 seconds || 9.002 days ||
|-
| 8 || Sep 5 || 100 viewings of ''Groundhog Day'' || 7.01 days || See Day 71 (Jul 4).
|-
| 7 || Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven) || 6.04 days || 8,700 minutes
|-
| 6 || Sep 7 || One pico-universe-lifetime || 5.04 days || See Day 51 (Jul 24)
|-
| 5 || Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks || 4.63 days || The chorus lasts about 8 seconds per 'person'
|-
| 4 || Sep 9 || One centiyear || 3.65 days || 365.24 days/100
|-
| 3 || Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times || 2.79 days || Based on a length of 4 minutes, 1 second
|-
| 2 || Sep 11 || ''Speed'' (1994) played at one frame per second || 1.9 days || {{w|Speed_(1994_film)}} has runtime of 116 minutes = 6,960 seconds = 167,040 film frames at standard frame rate of 24 frames/second
|-
| 1 || Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1) || 0.76 days || Each iteration contains ''N'' verses. ''N + N-1 + N-2 ... + 1'' equals ''N * (N+1) / 2'', so 99 recursions = 4950 verses. Using the same 13-second (72 bpm) rate as Jun 29, this is close to 18 hours. Probably refers to Donald Knuth's article {{w|The Complexity of Songs}}.
|-
| 0 || Sep 13 || ''What If? 2'' release day || N/A ||
|}

The title text refers to the recursive time period on Sep 12. If you don't stop when you reach N=0 bottles, the repetition never ends, so that time interval becomes infinite. He likens it to {{w|The Song That Never Ends}}, another repetitive children's song, which is specifically intended to go on forever. The difference is that the Beer song has a natural stopping point at 0, while ''The Song That Never Ends'' is completely repetitive.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

Large heading: Countdown to ''What if? 2''

Subheading: (Preorder at [https://xkcd.com/whatif2 xkcd.com/whatif2] to get it at the end of the countdown)

Remainder of comic is a calendar with the date in one corner of each day's box.

{| class="wikitable"
|-
! Date !! Description
|-
| Jun 22 || πe millidecades
|-
| Jun 23 || 7 megaseconds
|-
| Jun 24 || e lunar months
|-
| Jun 25 || 60 rotations of Foucault's pendulum in Paris
|-
| Jun 26 || 8 milligenerations
|-
| Jun 27 || 777,777 dog minutes
|-
| Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads)
|-
| Jun 29 || 5,000 repeats of ''99 Bottles of Beer''
|-
| Jun 30 || 5 baker's fortnights (15 days)
|-
| Jul 1 || √2 dog years
|-
| Jul 2 || π millivics (1/1000th of Queen Victoria's reign)
|-
| Jul 3 || 42 drives from NYC to LA (Google Maps estimate)
|-
| Jul 4 || 1,000 viewings of ''Groundhog Day''
|-
| Jul 5 || 100,000 minutes
|-
| Jul 6 || 1/10th of Martian year
|-
| Jul 7 || 1,234,567 sound-miles
|-
| Jul 8 || 2πe seconds
|-
| Jul 9 || 216 beats (Swatch Internet Time)
|-
| Jul 10 || 1,000 ISS orbits
|-
| Jul 11 || Five hundred twenty five thousand (base seven) minutes (text preceded by several drawn musical notes)
|-
| Jul 12 || 1050 Planck times
|-
| Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)
|-
| Jul 14 || Four score and seven kilominutes
|-
| Jul 15 || 2 lunar months
|-
| Jul 16 || Half a day on Venus
|-
| Jul 17 || 5 megaseconds
|-
| Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature)
|-
| Jul 19 || 1,000 viewings of ''Run Lola Run''
|-
| Jul 20 || One million sound-miles
|-
| Jul 21 || 30 Ionian months
|-
| Jul 22 || One dog year
|-
| Jul 23 || 60 viewings of ''Star Wars Episodes I-IX''
|-
| Jul 24 || 1/100,000,000,000th of the universe's age
|-
| Jul 25 || 5 milli-generations
|-
| Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven''
|-
| Jul 27 || φeπ minutes
|-
| Jul 28 || 4 megaseconds
|-
| Jul 29 || 216 minutes
|-
| Jul 30 || eee seconds
|-
| Jul 31 || π fortnights
|-
| Aug 1 || one devil's spacewalk (666 orbits of the ISS)
|-
| Aug 2 || 1 kilowatt-hour per watt
|-
| Aug 3 || eπ Ionian months
|-
| Aug 4 || 30 rotations of Foucault's pendulum in Paris
|-
| Aug 5 || e fortnights
|-
| Aug 6 || πe baker's days (25 hours)
|-
| Aug 7 || one deciyear
|-
| Aug 8 || 7! milliweeks
|-
| Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music
|-
| Aug 10 || 1000 basketball games (game time)
|-
| Aug 11 || 777 hours
|-
| Aug 12 || one millilincoln (1/1000 of fourscore and seven years)
|-
| Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads)
|-
| Aug 14 || All of ''Star Trek'', consecutively
|-
| Aug 15 || 777,777 nanocenturies
|-
| Aug 16 || one sidereal lunar month
|-
| Aug 17 || 6 dog months
|-
| Aug 18 || ππ kilominutes
|-
| Aug 19 || 7 games of ''7! minutes in Heaven''
|-
| Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy
|-
| Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times
|-
| Aug 22 || ''It's a Small World'' sung at 1/10,000th speed
|-
| Aug 23 || 500 hours
|-
| Aug 24 || √2 fortnights
|-
| Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles
|-
| Aug 26 || 100,000 breaths
|-
| Aug 27 || √2 megaseconds
|-
| Aug 28 || πππ πcoseconds
|-
| Aug 29 || One baker's fortnight (15 days)
|-
| Aug 30 || One baker's dozen (13) baker's days (25 hours)
|-
| Aug 31 || 300 hours
|-
| Sep 1 || One million seconds
|-
| Sep 2 || One nonstop bike ride from NYC to LA
|-
| Sep 3 || 1⁄1,000th of a generation
|-
| Sep 4 || 777,777 seconds
|-
| Sep 5 || 100 viewings of ''Groundhog Day''
|-
| Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven)
|-
| Sep 7 || One pico-universe-lifetime
|-
| Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks
|-
| Sep 9 || One centiyear
|-
| Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times
|-
| Sep 11 || ''Speed'' (1994) played at one frame per second
|-
| Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1)
|-
| Sep 13 || ''What If? 2'' release day
|}
{{comic discussion}}
[[Category:Book promotion]]
[[Category:Comics featuring real people]]
[[Category:Songs]]
[[Category:Animals]]

2636: What If? 2 Countdown

2022-06-24T19:52:11Z

162.158.166.183: /* Explanation */ typo

{{comic
| number = 2636
| date = June 22, 2022
| title = What If? 2 Countdown
| image = what_if_2_countdown.png
| titletext = If you don't end the 99 Bottles of Beer recursion at N=0 it just becomes The Other Song That Never Ends.
}}

==Explanation==
{{incomplete|Created by FOUR SCORE AND 7 BOTTLES OF BEER ON THE WALL - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
This comic takes the idea of {{w|Advent calendar}}s, and takes it to the extreme. It uses rather absurd and/or obscure ways to measure the amount of time until [[Randall]]'s new book ''What if? 2'' is released, with esoteric units or esoteric numbers. And often both.

Some concepts that appear several times throughout the calendar are:

* '''{{w|SI prefixes}}''', which can be applied to the beginning of a unit's name to multiply or divide the unit by powers of 10 or 1,000. This is standard for units like meters and grams, but is rarely applied to measurements of time other than when a unit of less than one second is needed, most commonly in various fields of science and engineering such as physics and electronics.
* The '''{{w|Gettysburg Address}}''', a famous speech delivered by U.S. president Abraham Lincoln in 1863, where he began by referring to the signing of the Declaration of Independence taking place "four score and seven years ago". A score is a dated term for the number 20, so "four score and seven" is equivalent to 87.
* A '''dog year''' is traditionally considered to be one-seventh the length of a normal human year, since a dog's overall lifespan is roughly one-seventh of a typical human's. The comic applies this to other units of time, such as minutes and months, each of which is also one-seventh the length of the standard unit. The number 7 (traditionally a "lucky number") is also used in many of the numbers quoted in the calendar.
* Other comparative durations of time that are not normally or usefully applied to day-length multiples. At the top end, there is the age of the universe, at the other there is {{w|Planck_units#Planck_time|Planck-time}} – with entire durations of periods of human history and the time needed to watch popular TV/film franchises in-between – most of which require a non-trivial multiplier or divisor to bring them to the necessary scale required.
* A '''{{w|baker's dozen}}''' is 13, or one more than a normal dozen. Here, the "baker's" prefix can be applied to any unit by adding an extra one of its constituent parts, like an extra hour added to a day.
* '''{{w|Irrational numbers}}''' like {{w|pi}} (3.14159...), {{w|Euler's number}} or ''e'' (2.71828...), the {{w|golden ratio}} (1.61803...), and the {{w|square root of 2}} (1.41421...). These are all interesting numbers because of their mathematical properties, but very impractical to use as arbitrary measurements of time because they have an endless series of non-repeating decimal digits.
* The teenage dating game '''{{w|Seven minutes in heaven}}'''.
* Rotation and revolution periods of various planets and moons in the Solar System.

{| class="wikitable"
|-
! Days left !! Date !! Duration specified !! Duration in days !! Explanation
|-
| 83 || Jun 22 || πe millidecades || 82.03 days || π ≈ 3.14159, e ≈ 2.718, so πe is about 22.459. A millidecade is 1/1000 decade, or 1/100 year, or 3.652425 days. Multiplying these results in 82.03 days. This is a play on {{w|Euler's identity}}, eiπ=-1, but raising pi to the power of e instead.
|-
| 82 || Jun 23 || 7 megaseconds || 81.02 days || 7,000,000 seconds
|-
| 81 || Jun 24 || e lunar months || 80.27 days || A lunar month ≈ 29.53059 days, e ≈ 2.718
|-
| 80 || Jun 25 || 60 rotations of Foucault's pendulum in Paris || 79.67 days || '''{{w|Paris}}''' is the capital city of '''{{w|France}}''' and it's located at a latitude of 48º 51' 23" N. '''{{w|Foucault's pendulum}}''' is a device conceived by French physicist '''{{w|Léon Foucault}}''', consisting of a pendulum that is free to rotate its plane of oscillation. When placed in a rotating '''{{w|Non-inertial reference frame}}''' such as the '''{{w|Earth}}''', that has an associated rotation period of 24 hours, the oscillation plane of Foucault's pendulum rotates at a rate determined by the Earth's period and the angle between the rotation axis of the frame of reference and the direction of its elongation in resting position, i.e. its latitude, with a period T = T🜨/sin(λ), being T🜨 Earth's period and λ the latitude of the pendulum. Historically, Léon Foucault performed this experiment in the city of Paris, most famously (although not for the first time, which happened at the '''{{w|Paris Observatory}}''') under the dome of the '''{{w|Panthéon}}''', to demonstrate Earth's rotation. At this latitude, Foucault's pendulum completes a full rotation every 31.8 hours.
|-
| 79 || Jun 26 || 8 milligenerations || 78.89 days || A generation is in general 22-33 years, with a reasonable mid-point of 27; and 8 x 0.001 (milli) x 365.2425 (accounting for leap years) x 27 ≈ 78.89 days
|-
| 78 || Jun 27 || 777,777 dog minutes || 77.16 days || A popular myth is that dogs age 7 times faster than humans, so 1 dog minute equals 1/7 human minutes.
|-
| 77 || Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads) || 77 days || 7!=7x6x5x4x3x2x1=5040 - The standard episode of ''Jeopardy'' is 22-26 minutes skipping ads - taking the lowest value you get 110880 minutes total, which is the exact value needed.
|-
| 76 || Jun 29 || 5,000 repeats of ''99 Bottles of Beer'' || 76.39 days || Each verse of {{w|99 Bottles of Beer}} is "''N'' bottles of beer on the wall, ''N'' bottles of beer. Take one down, pass it around, ''N-1'' bottles of beer on the wall." The entire song contains 99 verses. Randall apparently sings this rather slowly at around 72 bpm, taking about 13 seconds per verse.
|-
| 75 || Jun 30 || 5 baker's fortnights || 75 days || A {{w|baker's dozen}} is a dozen (12) plus 1 extra item. Randall has generalized this to adding 1 to any unit. A fortnight is 2 weeks, so a baker's fortnight is 15 days. 5x15 is 75 days.
|-
| 74 || Jul 1 || √2 dog years || 73.79 days || See day 78 (Jun 27)
|-
| 73 || Jul 2 || π millivics (1/1000th of Queen Victoria's reign) || 72.97 days || {{w|Queen Victoria}} ruled between 20 June 1837 and 22 January 1901 (23,226 days).
|-
| 72 || Jul 3 || 42 drives from NYC to LA (Google Maps estimate) || 71.75 days || According to Google Maps, the drive from New York City to Los Angeles via I-80 W (2789 miles or 4489 km) takes 41 hours.
|-
| 71 || Jul 4 || 1,000 viewings of ''Groundhog Day''|| 70.14 days || Using {{w|Groundhog Day (film)|Groundhog Day's}} 101-minute run time.
|-
| 70 || Jul 5 || 100,000 minutes || 69.44 days ||
|-
| 69 || Jul 6 || 1/10th of Martian year || 68.70 Earth days || Martian sidereal and tropical years both round to 687.0 Earth days
|-
| 68 || Jul 7 || 1,234,567 sound-miles || 67.63 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 67.6349058 days.
|-
| 67 || Jul 8 || 2πe seconds || 66.74 days || 2^(π^e) = 5,766,073 seconds
|-
| 66 || Jul 9 || 216 beats (Swatch Internet Time) || 65.54 days || {{w|.beat}} is equal to 1/1000 day.
|-
| 65 || Jul 10 || 1,000 ISS orbits || 64.58 days || Each orbit of the ISS takes 90-93 minutes. Here a value of 93 minutes is used.
|-
| 64 || Jul 11 || Five hundred twenty five thousand (base seven) minutes|| 62.88 days || This refers to {{w|radix}}-7 arithmetic: 525,0007 minutes = 90,55210 minutes. Also references the opening and recurring line "Five hundred twenty five thousand six hundred minutes" from {{w|Seasons of Love}}, a song from the musical {{w|Rent (musical)|''Rent''}}, which is also referenced in [[1047: Approximations]]. "base seven" has the same rhythm as "six hundred".
|-
| 63 || Jul 12 || 1050 Planck times || 62.38 days || 10^50 x 5.39 x 10^-44 seconds
|-
| 62 || Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)|| 62.50 days || {{w|The Office (British TV series)|''The Office''}} was originally a {{w|BBC}} television show which had no commercial breaks, but Randall is obviously more familiar with the {{w|The_Office_(American_TV_series)|US version}}. This US "half-hour" comedy format contains 22.5 minutes of content (including the title sequence) and 7.5 minutes of ads. 
|-
| 61 || Jul 14 || Four score and seven kilominutes || 60.42 days || 87 x 1000 minutes
|-
| 60 || Jul 15 || 2 lunar months || 59.06 days || There are a number of different ways to define the {{w|lunar month}}. The most common is the synodic month, because it relates to the phases of the moon, and it's approximately 29.53 days.
|-
| 59 || Jul 16 || Half a day on Venus || 58.375 days || A Venus synodic day is 116 days 18 hours.
|-
| 58 || Jul 17 || 5 megaseconds || 57.87 days || 5,000,000 seconds
|-
| 57 || Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature) || 4681~4763 years × 10-6 || Randall is stating that "literature" was invented approximately 2700 BCE. This is consistent with the earliest surviving coherent Sumerian texts, but the earliest proto-writing likely developed at least 500 years earlier according to {{w|History of writing}}.
|-
| 56 || Jul 19 || 1,000 viewings of ''Run Lola Run'' || 55.57 days || Using {{w|Run Lola Run|the movie's}} run time of 80 minutes.
|-
| 55 || Jul 20 || One million sound-miles || 54.78 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 54.7843137 days.
|-
| 54 || Jul 21 || 30 Ionian months || 53.07 days || Orbital period of Io around Jupiter is approximately 1.77 days.
|-
| 53 || Jul 22 || One dog year || 52.18 days || See day 78 (Jun 27)
|-
| 52 || Jul 23 || 60 viewings of ''Star Wars Episodes I-IX'' || 51.75 days || According to [https://dorksideoftheforce.com/2021/05/04/how-long-to-watch-every-star-wars-movie/ Fansided] the combined running times are 20 hours 42 minutes.
|-
| 51 || Jul 24 || 1/100,000,000,000th of the universe's age || 50.40 days || The universe is estimated to be about 13.8 billion years old.
|-
| 50 || Jul 25 || 5 milli-generations || 49.3 days || See day 79 (Jun 26)
|-
| 49 || Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven'' || 48.61 days || {{w|Seven minutes in heaven}} is an Anglo-culture teenager game, occuring in several movies. 10,000 minutes in Heaven is almost a week of making out (or doing whatever in a broom closet), so this game is unlikely.
|-
| 48 || Jul 27 || φeπ minutes || 47.62 days || 68,567.57 minutes
|-
| 47 || Jul 28 || 4 megaseconds || 46.30 days || 4,000,000 seconds
|-
| 46 || Jul 29 || 216 minutes || 45.51 days || 65,536 minutes
|-
| 45 || Jul 30 || eee seconds || 44.15 days || 3,814,279.10 seconds
|-
| 44 || Jul 31 || π fortnights|| 43.98 days || 3.14159 x 14 days
|-
| 43 || Aug 1 || One devil's spacewalk (666 orbits of the ISS) || 43.01 days || See day 65 (Jul 10). 666 is the {{w|number of the beast}}.
|-
| 42 || Aug 2 || 1 kilowatt-hour per watt || 41.66 days || 1000 hours
|-
| 41 || Aug 3 || eπ Ionian months || 40.94 days || Orbital period of Io around Jupiter is 1.769137786 days
|-
| 40 || Aug 4 || 30 rotations of Foucault's pendulum in Paris || 39.84 days || Refer to Day 80 (Jun 25)
|-
| 39 || Aug 5 || e fortnights || 38.06 days ||2.71828 x 14 days
|-
| 38 || Aug 6 || πe baker's days (25 hours) || 37.98 days || See day 75 (Jun 30)
|-
| 37 || Aug 7 || One deciyear || 36.52 days || One tenth of one year
|-
| 36 || Aug 8 || 7! milliweeks || 35.28 days || 5040 × 0.001 weeks
|-
| 35 || Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music || 34.72 days || ''Think'' is the music played while the contestants try to answer the Final Jeopardy question; it is 30 seconds long.
|-
| 34 || Aug 10 || 1000 basketball games (game time) || 33.33 days || Uses the NBA game time of four 12-minute quarters, or 48 minutes
|-
| 33 || Aug 11 || 777 hours || 32.38 days ||
|-
| 32 || Aug 12 || One millilincoln (1/1000 of fourscore and seven years) || 31.78 days || {{w|Abraham Lincoln}}'s {{w|Gettysburg Address}} begins with the famous phrase "Four score and seven years ago". 1 score = twenty. 
|-
| 31 || Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads) || 31.25 days || Uses a television 'hour' containing 45 minutes of content and 15 minutes of ads
|-
| 30 || Aug 14 || All of ''Star Trek'', consecutively || 27.16* days || As per [https://redshirtsalwaysdie.com/2021/01/22/take-far-longer-watch-star-trek-think/ RedShirtsAlwaysDie.com] of January 22, 2021. *Note well: dozens of additional ''Star Trek'' franchise episodes have been produced since, and more are presently scheduled to be released through June, July, and August, so this value is somewhat indeterminate over the scope of the countdown.
|-
| 29 || Aug 15 || 777,777 nanocenturies || 28.41 days || 777,777 × 10-9 × 100 years
|-
| 28 || Aug 16 || One sidereal lunar month || 27.3 days || The time it takes moon to return to the same position relative to the fixed stars
|-
| 27 || Aug 17 || 6 dog months || 26.1 days || See day 78 (Jun 27)
|-
| 26 || Aug 18 || ππ kilominutes || 25.32 days || 36,462.16 minutes
|-
| 25 || Aug 19 || 7 games of 7! minutes in Heaven || 24.5 days || 7 x 5040 (7 {{w|Factorial}}) minutes. See also day 49 (Jul 26).
|-
| 24 || Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy || 23.82 days || ''The Fellowship of the Ring'' extended version is 208 minutes, ''The Two Towers'' is 226 minutes, and ''The Return of the King'' is 252 minutes for its e.v., according to [https://fictionhorizon.com/how-long-are-all-the-lord-of-the-rings-and-the-hobbit-movies-combined/ FictionHorizon.com]
|-
| 23 || Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times || 22.21 days || See day 72 (Jul 3). This is for 6 round-trips and 1 one-way trip.
|-
| 22 || Aug 22 || ''It's a Small World'' sung at 1/10,000th speed || 21.18 days || {{w|It's a Small World}} is a song that was composed for the attraction of the same name at various {{w|Disney}} theme parks, and plays continuously at them in various languages.
|-
| 21 || Aug 23 || 500 hours || 20.83 days ||
|-
| 20 || Aug 24 || √2 fortnights || 19.80 days || 1.4142 × 14 days
|-
| 19 || Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles || 18.94 days || {{w|Vanessa Carlton}} is an American singer, and {{w|A Thousand Miles}} is her most successful song. Randall estimates her walking speed at about 2.2 miles/hour.
|-
| 18 || Aug 26 || 100,000 breaths || 15 seconds per breath for 17 days || Normal respiratory rate for adults is typically 12-20 breaths per minute, or about 3-4 seconds each. Randall may be a practitioner of "slow breathing".
|-
| 17 || Aug 27 || √2 megaseconds || 16.37 days || 1.4142 × 1,000,000 seconds
|-
| 16 || Aug 28 || πππ πcoseconds || 15.51 days || 1.3402 × 1018 picoseconds (i.e., 10-12 seconds), making a joke how the mathematical "pi" is written with the character "π"
|-
| 15 || Aug 29 || One baker's fortnight (15 days) || 15 days || See day 75 (Jun 30)
|-
| 14 || Aug 30 || One baker's dozen (13) baker's days (25 hours) || 13.54 days || 325 hours; see day 75 (Jun 30)
|-
| 13 || Aug 31 || 300 hours || 12.5 days ||
|-
| 12 || Sep 1 || One million seconds || 11.57 days ||
|-
| 11 || Sep 2 || One nonstop bike ride from NYC to LA || 10.54 days || Google maps estimates the trip at 253 hours
|-
| 10 || Sep 3 || 1⁄1,000th of a generation || 9.86 days || See day 79 (Jun 26)
|-
| 9 || Sep 4 || 777,777 seconds || 9.002 days ||
|-
| 8 || Sep 5 || 100 viewings of ''Groundhog Day'' || 7.01 days || See Day 71 (Jul 4).
|-
| 7 || Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven) || 6.04 days || 8,700 minutes
|-
| 6 || Sep 7 || One pico-universe-lifetime || 5.04 days || See Day 51 (Jul 24)
|-
| 5 || Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks || 4.63 days || The chorus lasts about 8 seconds per 'person'
|-
| 4 || Sep 9 || One centiyear || 3.65 days || 365.24 days/100
|-
| 3 || Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times || 2.79 days || Based on a length of 4 minutes, 1 second
|-
| 2 || Sep 11 || ''Speed'' (1994) played at one frame per second || 1.9 days || {{w|Speed_(1994_film)}} has runtime of 116 minutes = 6,960 seconds = 167,040 film frames at standard frame rate of 24 frames/second
|-
| 1 || Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1) || 0.76 days || Each iteration contains ''N'' verses. ''N + N-1 + N-2 ... + 1'' equals ''N * (N+1) / 2'', so 99 recursions = 4950 verses. Using the same 13-second (72 bpm) rate as Jun 29, this is close to 18 hours. Probably refers to Donald Knuth's article {{w|The Complexity of Songs}}.
|-
| 0 || Sep 13 || ''What If? 2'' release day || N/A ||
|}

The title text refers to the recursive time period on Sep 12. If you don't stop when you reach N=0 bottles, the repetition never ends, so that time interval becomes infinite. He likens it to {{w|The Song That Never Ends}}, another repetitive children's song, which is specifically intended to go on forever. The difference is that the Beer song has a natural stopping point at 0, while ''The Song That Never Ends'' is completely repetitive.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

Large heading: Countdown to ''What if? 2''

Subheading: (Preorder at [https://xkcd.com/whatif2 xkcd.com/whatif2] to get it at the end of the countdown)

Remainder of comic is a calendar with the date in one corner of each day's box.

{| class="wikitable"
|-
! Date !! Description
|-
| Jun 22 || πe millidecades
|-
| Jun 23 || 7 megaseconds
|-
| Jun 24 || e lunar months
|-
| Jun 25 || 60 rotations of Foucault's pendulum in Paris
|-
| Jun 26 || 8 milligenerations
|-
| Jun 27 || 777,777 dog minutes
|-
| Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads)
|-
| Jun 29 || 5,000 repeats of ''99 Bottles of Beer''
|-
| Jun 30 || 5 baker's fortnights (15 days)
|-
| Jul 1 || √2 dog years
|-
| Jul 2 || π millivics (1/1000th of Queen Victoria's reign)
|-
| Jul 3 || 42 drives from NYC to LA (Google Maps estimate)
|-
| Jul 4 || 1,000 viewings of ''Groundhog Day''
|-
| Jul 5 || 100,000 minutes
|-
| Jul 6 || 1/10th of Martian year
|-
| Jul 7 || 1,234,567 sound-miles
|-
| Jul 8 || 2πe seconds
|-
| Jul 9 || 216 beats (Swatch Internet Time)
|-
| Jul 10 || 1,000 ISS orbits
|-
| Jul 11 || Five hundred twenty five thousand (base seven) minutes (text preceded by several drawn musical notes)
|-
| Jul 12 || 1050 Planck times
|-
| Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)
|-
| Jul 14 || Four score and seven kilominutes
|-
| Jul 15 || 2 lunar months
|-
| Jul 16 || Half a day on Venus
|-
| Jul 17 || 5 megaseconds
|-
| Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature)
|-
| Jul 19 || 1,000 viewings of ''Run Lola Run''
|-
| Jul 20 || One million sound-miles
|-
| Jul 21 || 30 Ionian months
|-
| Jul 22 || One dog year
|-
| Jul 23 || 60 viewings of ''Star Wars Episodes I-IX''
|-
| Jul 24 || 1/100,000,000,000th of the universe's age
|-
| Jul 25 || 5 milli-generations
|-
| Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven''
|-
| Jul 27 || φeπ minutes
|-
| Jul 28 || 4 megaseconds
|-
| Jul 29 || 216 minutes
|-
| Jul 30 || eee seconds
|-
| Jul 31 || π fortnights
|-
| Aug 1 || one devil's spacewalk (666 orbits of the ISS)
|-
| Aug 2 || 1 kilowatt-hour per watt
|-
| Aug 3 || eπ Ionian months
|-
| Aug 4 || 30 rotations of Foucault's pendulum in Paris
|-
| Aug 5 || e fortnights
|-
| Aug 6 || πe baker's days (25 hours)
|-
| Aug 7 || one deciyear
|-
| Aug 8 || 7! milliweeks
|-
| Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music
|-
| Aug 10 || 1000 basketball games (game time)
|-
| Aug 11 || 777 hours
|-
| Aug 12 || one millilincoln (1/1000 of fourscore and seven years)
|-
| Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads)
|-
| Aug 14 || All of ''Star Trek'', consecutively
|-
| Aug 15 || 777,777 nanocenturies
|-
| Aug 16 || one sidereal lunar month
|-
| Aug 17 || 6 dog months
|-
| Aug 18 || ππ kilominutes
|-
| Aug 19 || 7 games of ''7! minutes in Heaven''
|-
| Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy
|-
| Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times
|-
| Aug 22 || ''It's a Small World'' sung at 1/10,000th speed
|-
| Aug 23 || 500 hours
|-
| Aug 24 || √2 fortnights
|-
| Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles
|-
| Aug 26 || 100,000 breaths
|-
| Aug 27 || √2 megaseconds
|-
| Aug 28 || πππ πcoseconds
|-
| Aug 29 || One baker's fortnight (15 days)
|-
| Aug 30 || One baker's dozen (13) baker's days (25 hours)
|-
| Aug 31 || 300 hours
|-
| Sep 1 || One million seconds
|-
| Sep 2 || One nonstop bike ride from NYC to LA
|-
| Sep 3 || 1⁄1,000th of a generation
|-
| Sep 4 || 777,777 seconds
|-
| Sep 5 || 100 viewings of ''Groundhog Day''
|-
| Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven)
|-
| Sep 7 || One pico-universe-lifetime
|-
| Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks
|-
| Sep 9 || One centiyear
|-
| Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times
|-
| Sep 11 || ''Speed'' (1994) played at one frame per second
|-
| Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1)
|-
| Sep 13 || ''What If? 2'' release day
|}
{{comic discussion}}
[[Category:Book promotion]]
[[Category:Comics featuring real people]]
[[Category:Songs]]
[[Category:Animals]]

2636: What If? 2 Countdown

2022-06-24T19:51:31Z

162.158.166.183: /* Explanation */ typo

{{comic
| number = 2636
| date = June 22, 2022
| title = What If? 2 Countdown
| image = what_if_2_countdown.png
| titletext = If you don't end the 99 Bottles of Beer recursion at N=0 it just becomes The Other Song That Never Ends.
}}

==Explanation==
{{incomplete|Created by FOUR SCORE AND 7 BOTTLES OF BEER ON THE WALL - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
This comic takes the idea of {{w|Advent calendar}}s, and takes it to the extreme. It uses rather absurd and/or obscure ways to measure the amount of time until [[Randall]]'s new book ''What if? 2'' is released, with esoteric units or esoteric numbers. And often both.

Some concepts that appear several times throughout the calendar are:

* '''{{w|SI prefixes}}''', which can be applied to the beginning of a unit's name to multiply or divide the unit by powers of 10 or 1,000. This is standard for units like meters and grams, but is rarely applied to measurements of time other than when a unit of less than one second is needed, most commonly in various fields of science and engineering such as physics and electronics.
* The '''{{w|Gettysburg Address}}''', a famous speech delivered by U.S. president Abraham Lincoln in 1863, where he began by referring to the signing of the Declaration of Independence taking place "four score and seven years ago". A score is a dated term for the number 20, so "four score and seven" is equivalent to 87.
* A '''dog year''' is traditionally considered to be one-seventh the length of a normal human year, since a dog's overall lifespan is roughly one-seventh of a typical human's. The comic applies this to other units of time, such as minutes and months, each of which is also one-seventh the length of the standard unit. The number 7 (traditionally a "lucky number") is also used in many of the numbers quoted in the calendar.
* Other comparative durations of time that are not normally or usefully applied to day-length multiples. At the top end, there is the age of the universe, at the other there is {{w|Planck_units#Planck_time|Planck-time}} – with entire durations of periods of human history and the time needed to watch popular TV/film franchises in-between – most of which require a non-trivial multiplier or divisor to bring them to the necessary scale required.
* A '''{{w|baker's dozen}}''' is 13, or one more than a normal dozen. Here, the "baker's" prefix can be applied to any unit by adding an extra one of its constituent parts, like an extra hour added to a day.
* '''{{w|Irrational numbers}}''' like {{w|pi}} (3.14159...), {{w|Euler's number}} or ''e'' (2.71828...), the {{w|golden ratio}} (1.61803...), and the {{w|square root of 2}} (1.41421...). These are all interesting numbers because of their mathematical properties, but very impractical to use as arbitrary measurements of time because they have an endless series of non-repeating decimal digits.
* The teenage dating game '''{{w|Seven minutes in heaven}}'''.
* Rotation and revolution periods of various planets and moons in the Solar System.

{| class="wikitable"
|-
! Days left !! Date !! Duration specified !! Duration in days !! Explanation
|-
| 83 || Jun 22 || πe millidecades || 82.03 days || π ≈ 3.14159, e ≈ 2.718, so πe is about 22.459. A millidecade is 1/1000 decade, or 1/100 year, or 3.652425 days. Multiplying these results in 82.03 days. This is a play on {{w|Euler's identity}}, eiπ=-1, but raising pi to the power of e instead.
|-
| 82 || Jun 23 || 7 megaseconds || 81.02 days || 7,000,000 seconds
|-
| 81 || Jun 24 || e lunar months || 80.27 days || A lunar month ≈ 29.53059 days, e ≈ 2.718
|-
| 80 || Jun 25 || 60 rotations of Foucault's pendulum in Paris || 79.67 days || '''{{w|Paris}}''' is the capital city of '''{{w|France}}''' and it's located at a latitude of 48º 51' 23" N. '''{{w|Foucault's pendulum}}''' is a device conceived by French physicist '''{{w|Léon Foucault}}''', consisting of a pendulum that is free to rotate its plane of oscillation. When placed in a rotating '''{{w|Non-inertial reference frame}}''' such as the '''{{w|Earth}}''', that has an associated rotation period of 24 hours, the oscillation plane of Foucault's pendulum rotates at a rate determined by the Earth's period and the angle between the rotation axis of the frame of reference and the direction of its elongation in resting position, i.e. its latitude, with a period T = T🜨/sin(λ), being T🜨 Earth's period and λ the latitude of the pendulum. Historically, Léon Foucault performed this experiment in the city of Paris, most famously (although not for the first time, which happened at the '''{{w|Paris Observatory}}''') under the dome of the '''{{w|Panthéon}}''', to demonstrate Earth's rotation. At this latitude, Foucault's pendulum completes a full rotation every 31.8 hours.
|-
| 79 || Jun 26 || 8 milligenerations || 78.89 days || A generation is in general 22-33 years, with a reasonable mid-point of 27; and 8 x 0.001 (milli) x 365.2425 (accounting for leap years) x 27 ≈ 78.89 days
|-
| 78 || Jun 27 || 777,777 dog minutes || 77.16 days || A popular myth is that dogs age 7 times faster than humans, so 1 dog minute equals 1/7 human minutes.
|-
| 77 || Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads) || 77 days || 7!=7x6x5x4x3x2x1=5040 - The standard episode of ''Jeopardy'' is 22-26 minutes skipping ads - taking the lowest value you get 110880 minutes total, which is the exact value needed.
|-
| 76 || Jun 29 || 5,000 repeats of ''99 Bottles of Beer'' || 76.39 days || Each verse of {{w|99 Bottles of Beer}} is "''N'' bottles of beer on the wall, ''N'' bottles of beer. Take one down, pass it around, ''N-1'' bottles of beer on the wall." The entire song contains 99 verses. Randall apparently sings this rather slowly at around 72 bpm, taking about 13 seconds per verse.
|-
| 75 || Jun 30 || 5 baker's fortnights || 75 days || A {{w|baker's dozen}} is a dozen (12) plus 1 extra item. Randall has generalized this to adding 1 to any unit. A fortnight is 2 weeks, so a baker's fortnight is 15 days. 5x15 is 75 days.
|-
| 74 || Jul 1 || √2 dog years || 73.79 days || See day 78 (Jun 27)
|-
| 73 || Jul 2 || π millivics (1/1000th of Queen Victoria's reign) || 72.97 days || {{w|Queen Victoria}} ruled between 20 June 1837 and 22 January 1901 (23,226 days).
|-
| 72 || Jul 3 || 42 drives from NYC to LA (Google Maps estimate) || 71.75 days || According to Google Maps, the drive from New York City to Los Angeles via I-80 W (2789 miles or 4489 km) takes 41 hours.
|-
| 71 || Jul 4 || 1,000 viewings of ''Groundhog Day''|| 70.14 days || Using {{w|Groundhog Day (film)|Groundhog Day's}} 101-minute run time.
|-
| 70 || Jul 5 || 100,000 minutes || 69.44 days ||
|-
| 69 || Jul 6 || 1/10th of Martian year || 68.70 Earth days || Martian sidereal and tropical years both round to 687.0 Earth days
|-
| 68 || Jul 7 || 1,234,567 sound-miles || 67.63 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 67.6349058 days.
|-
| 67 || Jul 8 || 2πe seconds || 66.74 days || 2^(π^e) = 5,766,073 seconds
|-
| 66 || Jul 9 || 216 beats (Swatch Internet Time) || 65.54 days || {{w|.beat}} is equal to 1/1000 day.
|-
| 65 || Jul 10 || 1,000 ISS orbits || 64.58 days || Each orbit of the ISS takes 90-93 minutes. Here a value of 93 minutes is used.
|-
| 64 || Jul 11 || Five hundred twenty five thousand (base seven) minutes|| 62.88 days || This refers to {{w|radix}}-7 arithmetic: 525,0007 minutes = 90,55210 minutes. Also references the opening and recurring line "Five hundred twenty five thousand six hundred minutes" from {{w|Seasons of Love}}, a song from the musical {{w|Rent (musical)|''Rent''}}, which is also referenced in [[1047: Approximations]]. "base seven" has the same rhythm as "six hundred".
|-
| 63 || Jul 12 || 1050 Planck times || 62.38 days || 10^50 x 5.39 x 10^-44 seconds
|-
| 62 || Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)|| 62.50 days || {{w|The Office (British TV series)|''The Office''}} was originally a {{w|BBC}} television show which had no commercial breaks, but Randall is obviously more familiar with the {{w|The_Office_(American_TV_series)|US version}}. This US "half-hour" comedy format contains 22.5 minutes of content (including the title sequence) and 7.5 minutes of ads. 
|-
| 61 || Jul 14 || Four score and seven kilominutes || 60.42 days || 87 x 1000 minutes
|-
| 60 || Jul 15 || 2 lunar months || 59.06 days || There are a number of different ways to define the {{w|lunar month}}. The most common is the synodic month, because it relates to the phases of the moon, and it's approximately 29.53 days.
|-
| 59 || Jul 16 || Half a day on Venus || 58.375 days || A Venus synodic day is 116 days 18 hours.
|-
| 58 || Jul 17 || 5 megaseconds || 57.87 days || 5,000,000 seconds
|-
| 57 || Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature) || 4681~4763 years × 10-6 || Randall is stating that "literature" was invented approximately 2700 BCE. This is consistent with the earliest surviving coherent Sumerian texts, but the earliest proto-writing likely developed at least 500 years earlier according to {{w|History of writing}}.
|-
| 56 || Jul 19 || 1,000 viewings of ''Run Lola Run'' || 55.57 days || Using {{w|Run Lola Run|the movie's}} run time of 80 minutes.
|-
| 55 || Jul 20 || One million sound-miles || 54.78 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 54.7843137 days.
|-
| 54 || Jul 21 || 30 Ionian months || 53.07 days || Orbital period of Io around Jupiter is approximately 1.77 days.
|-
| 53 || Jul 22 || One dog year || 52.18 days || See day 78 (Jun 27)
|-
| 52 || Jul 23 || 60 viewings of ''Star Wars Episodes I-IX'' || 51.75 days || According to [https://dorksideoftheforce.com/2021/05/04/how-long-to-watch-every-star-wars-movie/ Fansided] the combined running times are 20 hours 42 minutes.
|-
| 51 || Jul 24 || 1/100,000,000,000th of the universe's age || 50.40 days || The universe is estimated to be about 13.8 billion years old.
|-
| 50 || Jul 25 || 5 milli-generations || 49.3 days || See day 79 (Jun 26)
|-
| 49 || Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven'' || 48.61 days || {{w|Seven minutes in heaven}} is an Anglo-culture teenager game, occuring in several movies. 10,000 minutes in Heaven is almost a week of making out (or doing whatever in a broom closet), so this game is unlikely.
|-
| 48 || Jul 27 || φeπ minutes || 47.62 days || 68,567.57 minutes
|-
| 47 || Jul 28 || 4 megaseconds || 46.30 days || 4,000,000 seconds
|-
| 46 || Jul 29 || 216 minutes || 45.51 days || 65,536 minutes
|-
| 45 || Jul 30 || eee seconds || 44.15 days || 3,814,279.10 seconds
|-
| 44 || Jul 31 || π fortnights|| 43.98 days || 3.14159 x 14 days
|-
| 43 || Aug 1 || One devil's spacewalk (666 orbits of the ISS) || 43.01 days || See day 65 (Jul 10). 666 is the {{w|number of the beast}}.
|-
| 42 || Aug 2 || 1 kilowatt-hour per watt || 41.66 days || 1000 hours
|-
| 41 || Aug 3 || eπ Ionian months || 40.94 days || Orbital period of Io around Jupiter is 1.769137786 days
|-
| 40 || Aug 4 || 30 rotations of Foucault's pendulum in Paris || 39.84 days || Refer to Day 80 (Jun 25)
|-
| 39 || Aug 5 || e fortnights || 38.06 days ||2.71828 x 14 days
|-
| 38 || Aug 6 || πe baker's days (25 hours) || 37.98 days || See day 75 (Jun 30)
|-
| 37 || Aug 7 || One deciyear || 36.52 days || One tenth of one year
|-
| 36 || Aug 8 || 7! milliweeks || 35.28 days || 5040 × 0.001 weeks
|-
| 35 || Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music || 34.72 days || ''Think'' is the music played while the contestants try to answer the Final Jeopardy question; it is 30 seconds long.
|-
| 34 || Aug 10 || 1000 basketball games (game time) || 33.33 days || Uses the NBA game time of four 12-minute quarters, or 48 minutes
|-
| 33 || Aug 11 || 777 hours || 32.38 days ||
|-
| 32 || Aug 12 || One millilincoln (1/1000 of fourscore and seven years) || 31.78 days || {{w|Abraham Lincoln}}'s {{w|Gettysburg Address}} begins with the famous phrase "Four score and seven years ago". 1 score = twenty. 
|-
| 31 || Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads) || 31.25 days || Uses a television 'hour' containing 45 minutes of content and 15 minutes of ads
|-
| 30 || Aug 14 || All of ''Star Trek'', consecutively || 27.16* days || As per [https://redshirtsalwaysdie.com/2021/01/22/take-far-longer-watch-star-trek-think/ RedShirtsAlwaysDie.com] of January 22, 2021. *Note well: dozens of additional ''Star Trek'' franchise episodes have been produced since, and more are presently scheduled to be released through June, July, and August, so this value is somewhat indeterminate over the scope of the countdown.
|-
| 29 || Aug 15 || 777,777 nanocenturies || 28.41 days || 777,777 × 10-9 × 100 years
|-
| 28 || Aug 16 || One sidereal lunar month || 27.3 days || The time it takes moon to return to the same position relative to the fixed stars
|-
| 27 || Aug 17 || 6 dog months || 26.1 days || See day 78 (Jun 27)
|-
| 26 || Aug 18 || ππ kilominutes || 25.32 days || 36,462.16 minutes
|-
| 25 || Aug 19 || 7 games of 7! minutes in Heaven || 24.5 days || 7 x 5040 (7 {{w|Factorial}}) minutes. See also day 49 (Jul 26).
|-
| 24 || Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy || 23.82 days || ''The Fellowship of the Ring'' extended version is 208 minutes, ''The Two Towers'' is 226 minutes, and ''The Return of the King'' is 252 minutes for its e.v., according to [https://fictionhorizon.com/how-long-are-all-the-lord-of-the-rings-and-the-hobbit-movies-combined/ FictionHorizon.com]
|-
| 23 || Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times || 22.21 days || See day 72 (Jul 3). This is for 6 round-trips and 1 one-way trip.
|-
| 22 || Aug 22 || ''It's a Small World'' sung at 1/10,000th speed || 21.18 days || {{w|It's a Small World}} is a song that was composed for the attraction of the same name at various {{w|Disney}} theme parks, and plays continuously at them in various languages.
|-
| 21 || Aug 23 || 500 hours || 20.83 days ||
|-
| 20 || Aug 24 || √2 fortnights || 19.80 days || 1.4142 × 14 days
|-
| 19 || Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles || 18.94 days || {{w|Vanessa Carlton}} is an American singer, and {{w|A Thousand Miles}} is her most successful song. Randall estimates her walking speed at about 2.2 miles/hour.
|-
| 18 || Aug 26 || 100,000 breaths || 15 seconds per breath for 17 days || Normal respiratory rate for adults is typically 12-20 breaths per minute, or abou 3-4 seconds each. Randall may be a practitioner of "slow breathing".
|-
| 17 || Aug 27 || √2 megaseconds || 16.37 days || 1.4142 × 1,000,000 seconds
|-
| 16 || Aug 28 || πππ πcoseconds || 15.51 days || 1.3402 × 1018 picoseconds (i.e., 10-12 seconds), making a joke how the mathematical "pi" is written with the character "π"
|-
| 15 || Aug 29 || One baker's fortnight (15 days) || 15 days || See day 75 (Jun 30)
|-
| 14 || Aug 30 || One baker's dozen (13) baker's days (25 hours) || 13.54 days || 325 hours; see day 75 (Jun 30)
|-
| 13 || Aug 31 || 300 hours || 12.5 days ||
|-
| 12 || Sep 1 || One million seconds || 11.57 days ||
|-
| 11 || Sep 2 || One nonstop bike ride from NYC to LA || 10.54 days || Google maps estimates the trip at 253 hours
|-
| 10 || Sep 3 || 1⁄1,000th of a generation || 9.86 days || See day 79 (Jun 26)
|-
| 9 || Sep 4 || 777,777 seconds || 9.002 days ||
|-
| 8 || Sep 5 || 100 viewings of ''Groundhog Day'' || 7.01 days || See Day 71 (Jul 4).
|-
| 7 || Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven) || 6.04 days || 8,700 minutes
|-
| 6 || Sep 7 || One pico-universe-lifetime || 5.04 days || See Day 51 (Jul 24)
|-
| 5 || Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks || 4.63 days || The chorus lasts about 8 seconds per 'person'
|-
| 4 || Sep 9 || One centiyear || 3.65 days || 365.24 days/100
|-
| 3 || Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times || 2.79 days || Based on a length of 4 minutes, 1 second
|-
| 2 || Sep 11 || ''Speed'' (1994) played at one frame per second || 1.9 days || {{w|Speed_(1994_film)}} has runtime of 116 minutes = 6,960 seconds = 167,040 film frames at standard frame rate of 24 frames/second
|-
| 1 || Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1) || 0.76 days || Each iteration contains ''N'' verses. ''N + N-1 + N-2 ... + 1'' equals ''N * (N+1) / 2'', so 99 recursions = 4950 verses. Using the same 13-second (72 bpm) rate as Jun 29, this is close to 18 hours. Probably refers to Donald Knuth's article {{w|The Complexity of Songs}}.
|-
| 0 || Sep 13 || ''What If? 2'' release day || N/A ||
|}

The title text refers to the recursive time period on Sep 12. If you don't stop when you reach N=0 bottles, the repetition never ends, so that time interval becomes infinite. He likens it to {{w|The Song That Never Ends}}, another repetitive children's song, which is specifically intended to go on forever. The difference is that the Beer song has a natural stopping point at 0, while ''The Song That Never Ends'' is completely repetitive.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

Large heading: Countdown to ''What if? 2''

Subheading: (Preorder at [https://xkcd.com/whatif2 xkcd.com/whatif2] to get it at the end of the countdown)

Remainder of comic is a calendar with the date in one corner of each day's box.

{| class="wikitable"
|-
! Date !! Description
|-
| Jun 22 || πe millidecades
|-
| Jun 23 || 7 megaseconds
|-
| Jun 24 || e lunar months
|-
| Jun 25 || 60 rotations of Foucault's pendulum in Paris
|-
| Jun 26 || 8 milligenerations
|-
| Jun 27 || 777,777 dog minutes
|-
| Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads)
|-
| Jun 29 || 5,000 repeats of ''99 Bottles of Beer''
|-
| Jun 30 || 5 baker's fortnights (15 days)
|-
| Jul 1 || √2 dog years
|-
| Jul 2 || π millivics (1/1000th of Queen Victoria's reign)
|-
| Jul 3 || 42 drives from NYC to LA (Google Maps estimate)
|-
| Jul 4 || 1,000 viewings of ''Groundhog Day''
|-
| Jul 5 || 100,000 minutes
|-
| Jul 6 || 1/10th of Martian year
|-
| Jul 7 || 1,234,567 sound-miles
|-
| Jul 8 || 2πe seconds
|-
| Jul 9 || 216 beats (Swatch Internet Time)
|-
| Jul 10 || 1,000 ISS orbits
|-
| Jul 11 || Five hundred twenty five thousand (base seven) minutes (text preceded by several drawn musical notes)
|-
| Jul 12 || 1050 Planck times
|-
| Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)
|-
| Jul 14 || Four score and seven kilominutes
|-
| Jul 15 || 2 lunar months
|-
| Jul 16 || Half a day on Venus
|-
| Jul 17 || 5 megaseconds
|-
| Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature)
|-
| Jul 19 || 1,000 viewings of ''Run Lola Run''
|-
| Jul 20 || One million sound-miles
|-
| Jul 21 || 30 Ionian months
|-
| Jul 22 || One dog year
|-
| Jul 23 || 60 viewings of ''Star Wars Episodes I-IX''
|-
| Jul 24 || 1/100,000,000,000th of the universe's age
|-
| Jul 25 || 5 milli-generations
|-
| Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven''
|-
| Jul 27 || φeπ minutes
|-
| Jul 28 || 4 megaseconds
|-
| Jul 29 || 216 minutes
|-
| Jul 30 || eee seconds
|-
| Jul 31 || π fortnights
|-
| Aug 1 || one devil's spacewalk (666 orbits of the ISS)
|-
| Aug 2 || 1 kilowatt-hour per watt
|-
| Aug 3 || eπ Ionian months
|-
| Aug 4 || 30 rotations of Foucault's pendulum in Paris
|-
| Aug 5 || e fortnights
|-
| Aug 6 || πe baker's days (25 hours)
|-
| Aug 7 || one deciyear
|-
| Aug 8 || 7! milliweeks
|-
| Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music
|-
| Aug 10 || 1000 basketball games (game time)
|-
| Aug 11 || 777 hours
|-
| Aug 12 || one millilincoln (1/1000 of fourscore and seven years)
|-
| Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads)
|-
| Aug 14 || All of ''Star Trek'', consecutively
|-
| Aug 15 || 777,777 nanocenturies
|-
| Aug 16 || one sidereal lunar month
|-
| Aug 17 || 6 dog months
|-
| Aug 18 || ππ kilominutes
|-
| Aug 19 || 7 games of ''7! minutes in Heaven''
|-
| Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy
|-
| Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times
|-
| Aug 22 || ''It's a Small World'' sung at 1/10,000th speed
|-
| Aug 23 || 500 hours
|-
| Aug 24 || √2 fortnights
|-
| Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles
|-
| Aug 26 || 100,000 breaths
|-
| Aug 27 || √2 megaseconds
|-
| Aug 28 || πππ πcoseconds
|-
| Aug 29 || One baker's fortnight (15 days)
|-
| Aug 30 || One baker's dozen (13) baker's days (25 hours)
|-
| Aug 31 || 300 hours
|-
| Sep 1 || One million seconds
|-
| Sep 2 || One nonstop bike ride from NYC to LA
|-
| Sep 3 || 1⁄1,000th of a generation
|-
| Sep 4 || 777,777 seconds
|-
| Sep 5 || 100 viewings of ''Groundhog Day''
|-
| Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven)
|-
| Sep 7 || One pico-universe-lifetime
|-
| Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks
|-
| Sep 9 || One centiyear
|-
| Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times
|-
| Sep 11 || ''Speed'' (1994) played at one frame per second
|-
| Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1)
|-
| Sep 13 || ''What If? 2'' release day
|}
{{comic discussion}}
[[Category:Book promotion]]
[[Category:Comics featuring real people]]
[[Category:Songs]]
[[Category:Animals]]

2636: What If? 2 Countdown

2022-06-24T19:50:42Z

162.158.166.183: /* Explanation */ copyedit

{{comic
| number = 2636
| date = June 22, 2022
| title = What If? 2 Countdown
| image = what_if_2_countdown.png
| titletext = If you don't end the 99 Bottles of Beer recursion at N=0 it just becomes The Other Song That Never Ends.
}}

==Explanation==
{{incomplete|Created by FOUR SCORE AND 7 BOTTLES OF BEER ON THE WALL - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
This comic takes the idea of {{w|Advent calendar}}s, and takes it to the extreme. It uses rather absurd and/or obscure ways to measure the amount of time until [[Randall]]'s new book ''What if? 2'' is released, with esoteric units or esoteric numbers. And often both.

Some concepts that appear several times throughout the calendar are:

* '''{{w|SI prefixes}}''', which can be applied to the beginning of a unit's name to multiply or divide the unit by powers of 10 or 1,000. This is standard for units like meters and grams, but is rarely applied to measurements of time other than when a unit of less than one second is needed, most commonly in various fields of science and engineering such as physics and electronics.
* The '''{{w|Gettysburg Address}}''', a famous speech delivered by U.S. president Abraham Lincoln in 1863, where he began by referring to the signing of the Declaration of Independence taking place "four score and seven years ago". A score is a dated term for the number 20, so "four score and seven" is equivalent to 87.
* A '''dog year''' is traditionally considered to be one-seventh the length of a normal human year, since a dog's overall lifespan is roughly one-seventh of a typical human's. The comic applies this to other units of time, such as minutes and months, each of which is also one-seventh the length of the standard unit. The number 7 (traditionally a "lucky number") is also used in many of the numbers quoted in the calendar.
* Other comparative durations of time that are not normally or usefully applied to day-length multiples. At the top end, there is the age of the universe, at the other there is {{w|Planck_units#Planck_time|Planck-time}} – with entire durations of periods of human history and the time needed to watch popular TV/film franchises in-between – most of which require a non-trivial multiplier or divisor to bring them to the necessary scale required.
* A '''{{w|baker's dozen}}''' is 13, or one more than a normal dozen. Here, the "baker's" prefix can be applied to any unit by adding an extra one of its constituent parts, like an extra hour added to a day.
* '''{{w|Irrational numbers}}''' like {{w|pi}} (3.14159...), {{w|Euler's number}} or ''e'' (2.71828...), the {{w|golden ratio}} (1.61803...), and the {{w|square root of 2}} (1.41421...). These are all interesting numbers because of their mathematical properties, but very impractical to use as arbitrary measurements of time because they have an endless series of non-repeating decimal digits.
* The teenage dating game '''{{w|Seven minutes in heaven}}'''.
* Rotation and revolution periods of various planets and moons in the Solar System.

{| class="wikitable"
|-
! Days left !! Date !! Duration specified !! Duration in days !! Explanation
|-
| 83 || Jun 22 || πe millidecades || 82.03 days || π ≈ 3.14159, e ≈ 2.718, so πe is about 22.459. A millidecade is 1/1000 decade, or 1/100 year, or 3.652425 days. Multiplying these results in 82.03 days. This is a play on {{w|Euler's identity}}, eiπ=-1, but raising pi to the power of e instead.
|-
| 82 || Jun 23 || 7 megaseconds || 81.02 days || 7,000,000 seconds
|-
| 81 || Jun 24 || e lunar months || 80.27 days || A lunar month ≈ 29.53059 days, e ≈ 2.718
|-
| 80 || Jun 25 || 60 rotations of Foucault's pendulum in Paris || 79.67 days || '''{{w|Paris}}''' is the capital city of '''{{w|France}}''' and it's located at a latitude of 48º 51' 23" N. '''{{w|Foucault's pendulum}}''' is a device conceived by French physicist '''{{w|Léon Foucault}}''', consisting of a pendulum that is free to rotate its plane of oscillation. When placed in a rotating '''{{w|Non-inertial reference frame}}''' such as the '''{{w|Earth}}''', that has an associated rotation period of 24 hours, the oscillation plane of Foucault's pendulum rotates at a rate determined by the Earth's period and the angle between the rotation axis of the frame of reference and the direction of its elongation in resting position, i.e. its latitude, with a period T = T🜨/sin(λ), being T🜨 Earth's period and λ the latitude of the pendulum. Historically, Léon Foucault performed this experiment in the city of Paris, most famously (although not for the first time, which happened at the '''{{w|Paris Observatory}}''') under the dome of the '''{{w|Panthéon}}''', to demonstrate Earth's rotation. At this latitude, Foucault's pendulum completes a full rotation every 31.8 hours.
|-
| 79 || Jun 26 || 8 milligenerations || 78.89 days || A generation is in general 22-33 years, with a reasonable mid-point of 27; and 8 x 0.001 (milli) x 365.2425 (accounting for leap years) x 27 ≈ 78.89 days
|-
| 78 || Jun 27 || 777,777 dog minutes || 77.16 days || A popular myth is that dogs age 7 times faster than humans, so 1 dog minute equals 1/7 human minutes.
|-
| 77 || Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads) || 77 days || 7!=7x6x5x4x3x2x1=5040 - The standard episode of ''Jeopardy'' is 22-26 minutes skipping ads - taking the lowest value you get 110880 minutes total, which is the exact value needed.
|-
| 76 || Jun 29 || 5,000 repeats of ''99 Bottles of Beer'' || 76.39 days || Each verse of {{w|99 Bottles of Beer}} is "''N'' bottles of beer on the wall, ''N'' bottles of beer. Take one down, pass it around, ''N-1'' bottles of beer on the wall." The entire song contains 99 verses. Randall apparently sings this rather slowly at around 72 bpm, taking about 13 seconds per verse.
|-
| 75 || Jun 30 || 5 baker's fortnights || 75 days || A {{w|baker's dozen}} is a dozen (12) plus 1 extra item. Randall has generalized this to adding 1 to any unit. A fortnight is 2 weeks, so a baker's fortnight is 15 days. 5x15 is 75 days.
|-
| 74 || Jul 1 || √2 dog years || 73.79 days || See day 78 (Jun 27)
|-
| 73 || Jul 2 || π millivics (1/1000th of Queen Victoria's reign) || 72.97 days || {{w|Queen Victoria}} ruled between 20 June 1837 and 22 January 1901 (23,226 days).
|-
| 72 || Jul 3 || 42 drives from NYC to LA (Google Maps estimate) || 71.75 days || According to Google Maps, the drive from New York City to Los Angeles via I-80 W (2789 miles or 4489 km) takes 41 hours.
|-
| 71 || Jul 4 || 1,000 viewings of ''Groundhog Day''|| 70.14 days || Using {{w|Groundhog Day (film)|Groundhog Day's}} 101-minute run time.
|-
| 70 || Jul 5 || 100,000 minutes || 69.44 days ||
|-
| 69 || Jul 6 || 1/10th of Martian year || 68.70 Earth days || Martian sidereal and tropical years both round to 687.0 Earth days
|-
| 68 || Jul 7 || 1,234,567 sound-miles || 67.63 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 67.6349058 days.
|-
| 67 || Jul 8 || 2πe seconds || 66.74 days || 2^(π^e) = 5,766,073 seconds
|-
| 66 || Jul 9 || 216 beats (Swatch Internet Time) || 65.54 days || {{w|.beat}} is equal to 1/1000 day.
|-
| 65 || Jul 10 || 1,000 ISS orbits || 64.58 days || Each orbit of the ISS takes 90-93 minutes. Here a value of 93 minutes is used.
|-
| 64 || Jul 11 || Five hundred twenty five thousand (base seven) minutes|| 62.88 days || This refers to {{w|radix}}-7 arithmetic: 525,0007 minutes = 90,55210 minutes. Also references the opening and recurring line "Five hundred twenty five thousand six hundred minutes" from {{w|Seasons of Love}}, a song from the musical {{w|Rent (musical)|''Rent''}}, which is also referenced in [[1047: Approximations]]. "base seven" has the same rhythm as "six hundred".
|-
| 63 || Jul 12 || 1050 Planck times || 62.38 days || 10^50 x 5.39 x 10^-44 seconds
|-
| 62 || Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)|| 62.50 days || {{w|The Office (British TV series)|''The Office''}} was originally a {{w|BBC}} television show which had no commercial breaks, but Randall is obviously more familiar with the {{w|The_Office_(American_TV_series)|US version}}. This US "half-hour" comedy format contains 22.5 minutes of content (including the title sequence) and 7.5 minutes of ads. 
|-
| 61 || Jul 14 || Four score and seven kilominutes || 60.42 days || 87 x 1000 minutes
|-
| 60 || Jul 15 || 2 lunar months || 59.06 days || There are a number of different ways to define the {{w|lunar month}}. The most common is the synodic month, because it relates to the phases of the moon, and it's approximately 29.53 days.
|-
| 59 || Jul 16 || Half a day on Venus || 58.375 days || A Venus synodic day is 116 days 18 hours.
|-
| 58 || Jul 17 || 5 megaseconds || 57.87 days || 5,000,000 seconds
|-
| 57 || Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature) || 4681~4763 years × 10-6 || Randall is stating that "literature" was invented approximately 2700 BCE. This is consistent with the earliest surviving coherent Sumerian texts, but the earliest proto-writing likely developed at least 500 years earlier according to {{w|History of writing}}.
|-
| 56 || Jul 19 || 1,000 viewings of ''Run Lola Run'' || 55.57 days || Using {{w|Run Lola Run|the movie's}} run time of 80 minutes.
|-
| 55 || Jul 20 || One million sound-miles || 54.78 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 54.7843137 days.
|-
| 54 || Jul 21 || 30 Ionian months || 53.07 days || Orbital period of Io around Jupiter is approximately 1.77 days.
|-
| 53 || Jul 22 || One dog year || 52.18 days || See day 78 (Jun 27)
|-
| 52 || Jul 23 || 60 viewings of ''Star Wars Episodes I-IX'' || 51.75 days || According to [https://dorksideoftheforce.com/2021/05/04/how-long-to-watch-every-star-wars-movie/ Fansided] the combined running times are 20 hours 42 minutes.
|-
| 51 || Jul 24 || 1/100,000,000,000th of the universe's age || 50.40 days || The universe is estimated to be about 13.8 billion years old.
|-
| 50 || Jul 25 || 5 milli-generations || 49.3 days || See day 79 (Jun 26)
|-
| 49 || Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven'' || 48.61 days || {{w|Seven minutes in heaven}} is an Anglo-culture teenager game, occuring in several movies. 10,000 minutes in Heaven is almost a week of making out (or doing whatever in a broom closet), so this game is unlikely.
|-
| 48 || Jul 27 || φeπ minutes || 47.62 days || 68,567.57 minutes
|-
| 47 || Jul 28 || 4 megaseconds || 46.30 days || 4,000,000 seconds
|-
| 46 || Jul 29 || 216 minutes || 45.51 days || 65,536 minutes
|-
| 45 || Jul 30 || eee seconds || 44.15 days || 3,814,279.10 seconds
|-
| 44 || Jul 31 || π fortnights|| 43.98 days || 3.14159 x 14 days
|-
| 43 || Aug 1 || One devil's spacewalk (666 orbits of the ISS) || 43.01 days || See day 65 (Jul 10). 666 is the {{w|number of the beast}}.
|-
| 42 || Aug 2 || 1 kilowatt-hour per watt || 41.66 days || 1000 hours
|-
| 41 || Aug 3 || eπ Ionian months || 40.94 days || Orbital period of Io around Jupiter is 1.769137786 days
|-
| 40 || Aug 4 || 30 rotations of Foucault's pendulum in Paris || 39.84 days || Refer to Day 80 (Jun 25)
|-
| 39 || Aug 5 || e fortnights || 38.06 days ||2.71828 x 14 days
|-
| 38 || Aug 6 || πe baker's days (25 hours) || 37.98 days || See day 75 (Jun 30)
|-
| 37 || Aug 7 || One deciyear || 36.52 days || One tenth of one year
|-
| 36 || Aug 8 || 7! milliweeks || 35.28 days || 5040 × 0.001 weeks
|-
| 35 || Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music || 34.72 days || ''Think'' is the music played while the contestants try to answer the Final Jeopardy question; it is 30 seconds long.
|-
| 34 || Aug 10 || 1000 basketball games (game time) || 33.33 days || Uses the NBA game time of four 12-minute quarters, or 48 minutes
|-
| 33 || Aug 11 || 777 hours || 32.38 days ||
|-
| 32 || Aug 12 || One millilincoln (1/1000 of fourscore and seven years) || 31.78 days || {{w|Abraham Lincoln}}'s {{w|Gettysburg Address}} begins with the famous phrase "Four score and seven years ago". 1 score = twenty. 
|-
| 31 || Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads) || 31.25 days || Uses a television 'hour' containing 45 minutes of content and 15 minutes of ads
|-
| 30 || Aug 14 || All of ''Star Trek'', consecutively || 27.16* days || As per [https://redshirtsalwaysdie.com/2021/01/22/take-far-longer-watch-star-trek-think/ RedShirtsAlwaysDie.com] of January 22, 2001. *Note well: dozens of additional ''Star Trek'' franchise episodes have been produced since, and more are presently scheduled to be released through June, July, and August, so this value is somewhat indeterminate over the scope of the countdown.
|-
| 29 || Aug 15 || 777,777 nanocenturies || 28.41 days || 777,777 × 10-9 × 100 years
|-
| 28 || Aug 16 || One sidereal lunar month || 27.3 days || The time it takes moon to return to the same position relative to the fixed stars
|-
| 27 || Aug 17 || 6 dog months || 26.1 days || See day 78 (Jun 27)
|-
| 26 || Aug 18 || ππ kilominutes || 25.32 days || 36,462.16 minutes
|-
| 25 || Aug 19 || 7 games of 7! minutes in Heaven || 24.5 days || 7 x 5040 (7 {{w|Factorial}}) minutes. See also day 49 (Jul 26).
|-
| 24 || Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy || 23.82 days || ''The Fellowship of the Ring'' extended version is 208 minutes, ''The Two Towers'' is 226 minutes, and ''The Return of the King'' is 252 minutes for its e.v., according to [https://fictionhorizon.com/how-long-are-all-the-lord-of-the-rings-and-the-hobbit-movies-combined/ FictionHorizon.com]
|-
| 23 || Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times || 22.21 days || See day 72 (Jul 3). This is for 6 round-trips and 1 one-way trip.
|-
| 22 || Aug 22 || ''It's a Small World'' sung at 1/10,000th speed || 21.18 days || {{w|It's a Small World}} is a song that was composed for the attraction of the same name at various {{w|Disney}} theme parks, and plays continuously at them in various languages.
|-
| 21 || Aug 23 || 500 hours || 20.83 days ||
|-
| 20 || Aug 24 || √2 fortnights || 19.80 days || 1.4142 × 14 days
|-
| 19 || Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles || 18.94 days || {{w|Vanessa Carlton}} is an American singer, and {{w|A Thousand Miles}} is her most successful song. Randall estimates her walking speed at about 2.2 miles/hour.
|-
| 18 || Aug 26 || 100,000 breaths || 15 seconds per breath for 17 days || Normal respiratory rate for adults is typically 12-20 breaths per minute, or abou 3-4 seconds each. Randall may be a practitioner of "slow breathing".
|-
| 17 || Aug 27 || √2 megaseconds || 16.37 days || 1.4142 × 1,000,000 seconds
|-
| 16 || Aug 28 || πππ πcoseconds || 15.51 days || 1.3402 × 1018 picoseconds (i.e., 10-12 seconds), making a joke how the mathematical "pi" is written with the character "π"
|-
| 15 || Aug 29 || One baker's fortnight (15 days) || 15 days || See day 75 (Jun 30)
|-
| 14 || Aug 30 || One baker's dozen (13) baker's days (25 hours) || 13.54 days || 325 hours; see day 75 (Jun 30)
|-
| 13 || Aug 31 || 300 hours || 12.5 days ||
|-
| 12 || Sep 1 || One million seconds || 11.57 days ||
|-
| 11 || Sep 2 || One nonstop bike ride from NYC to LA || 10.54 days || Google maps estimates the trip at 253 hours
|-
| 10 || Sep 3 || 1⁄1,000th of a generation || 9.86 days || See day 79 (Jun 26)
|-
| 9 || Sep 4 || 777,777 seconds || 9.002 days ||
|-
| 8 || Sep 5 || 100 viewings of ''Groundhog Day'' || 7.01 days || See Day 71 (Jul 4).
|-
| 7 || Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven) || 6.04 days || 8,700 minutes
|-
| 6 || Sep 7 || One pico-universe-lifetime || 5.04 days || See Day 51 (Jul 24)
|-
| 5 || Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks || 4.63 days || The chorus lasts about 8 seconds per 'person'
|-
| 4 || Sep 9 || One centiyear || 3.65 days || 365.24 days/100
|-
| 3 || Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times || 2.79 days || Based on a length of 4 minutes, 1 second
|-
| 2 || Sep 11 || ''Speed'' (1994) played at one frame per second || 1.9 days || {{w|Speed_(1994_film)}} has runtime of 116 minutes = 6,960 seconds = 167,040 film frames at standard frame rate of 24 frames/second
|-
| 1 || Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1) || 0.76 days || Each iteration contains ''N'' verses. ''N + N-1 + N-2 ... + 1'' equals ''N * (N+1) / 2'', so 99 recursions = 4950 verses. Using the same 13-second (72 bpm) rate as Jun 29, this is close to 18 hours. Probably refers to Donald Knuth's article {{w|The Complexity of Songs}}.
|-
| 0 || Sep 13 || ''What If? 2'' release day || N/A ||
|}

The title text refers to the recursive time period on Sep 12. If you don't stop when you reach N=0 bottles, the repetition never ends, so that time interval becomes infinite. He likens it to {{w|The Song That Never Ends}}, another repetitive children's song, which is specifically intended to go on forever. The difference is that the Beer song has a natural stopping point at 0, while ''The Song That Never Ends'' is completely repetitive.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

Large heading: Countdown to ''What if? 2''

Subheading: (Preorder at [https://xkcd.com/whatif2 xkcd.com/whatif2] to get it at the end of the countdown)

Remainder of comic is a calendar with the date in one corner of each day's box.

{| class="wikitable"
|-
! Date !! Description
|-
| Jun 22 || πe millidecades
|-
| Jun 23 || 7 megaseconds
|-
| Jun 24 || e lunar months
|-
| Jun 25 || 60 rotations of Foucault's pendulum in Paris
|-
| Jun 26 || 8 milligenerations
|-
| Jun 27 || 777,777 dog minutes
|-
| Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads)
|-
| Jun 29 || 5,000 repeats of ''99 Bottles of Beer''
|-
| Jun 30 || 5 baker's fortnights (15 days)
|-
| Jul 1 || √2 dog years
|-
| Jul 2 || π millivics (1/1000th of Queen Victoria's reign)
|-
| Jul 3 || 42 drives from NYC to LA (Google Maps estimate)
|-
| Jul 4 || 1,000 viewings of ''Groundhog Day''
|-
| Jul 5 || 100,000 minutes
|-
| Jul 6 || 1/10th of Martian year
|-
| Jul 7 || 1,234,567 sound-miles
|-
| Jul 8 || 2πe seconds
|-
| Jul 9 || 216 beats (Swatch Internet Time)
|-
| Jul 10 || 1,000 ISS orbits
|-
| Jul 11 || Five hundred twenty five thousand (base seven) minutes (text preceded by several drawn musical notes)
|-
| Jul 12 || 1050 Planck times
|-
| Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)
|-
| Jul 14 || Four score and seven kilominutes
|-
| Jul 15 || 2 lunar months
|-
| Jul 16 || Half a day on Venus
|-
| Jul 17 || 5 megaseconds
|-
| Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature)
|-
| Jul 19 || 1,000 viewings of ''Run Lola Run''
|-
| Jul 20 || One million sound-miles
|-
| Jul 21 || 30 Ionian months
|-
| Jul 22 || One dog year
|-
| Jul 23 || 60 viewings of ''Star Wars Episodes I-IX''
|-
| Jul 24 || 1/100,000,000,000th of the universe's age
|-
| Jul 25 || 5 milli-generations
|-
| Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven''
|-
| Jul 27 || φeπ minutes
|-
| Jul 28 || 4 megaseconds
|-
| Jul 29 || 216 minutes
|-
| Jul 30 || eee seconds
|-
| Jul 31 || π fortnights
|-
| Aug 1 || one devil's spacewalk (666 orbits of the ISS)
|-
| Aug 2 || 1 kilowatt-hour per watt
|-
| Aug 3 || eπ Ionian months
|-
| Aug 4 || 30 rotations of Foucault's pendulum in Paris
|-
| Aug 5 || e fortnights
|-
| Aug 6 || πe baker's days (25 hours)
|-
| Aug 7 || one deciyear
|-
| Aug 8 || 7! milliweeks
|-
| Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music
|-
| Aug 10 || 1000 basketball games (game time)
|-
| Aug 11 || 777 hours
|-
| Aug 12 || one millilincoln (1/1000 of fourscore and seven years)
|-
| Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads)
|-
| Aug 14 || All of ''Star Trek'', consecutively
|-
| Aug 15 || 777,777 nanocenturies
|-
| Aug 16 || one sidereal lunar month
|-
| Aug 17 || 6 dog months
|-
| Aug 18 || ππ kilominutes
|-
| Aug 19 || 7 games of ''7! minutes in Heaven''
|-
| Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy
|-
| Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times
|-
| Aug 22 || ''It's a Small World'' sung at 1/10,000th speed
|-
| Aug 23 || 500 hours
|-
| Aug 24 || √2 fortnights
|-
| Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles
|-
| Aug 26 || 100,000 breaths
|-
| Aug 27 || √2 megaseconds
|-
| Aug 28 || πππ πcoseconds
|-
| Aug 29 || One baker's fortnight (15 days)
|-
| Aug 30 || One baker's dozen (13) baker's days (25 hours)
|-
| Aug 31 || 300 hours
|-
| Sep 1 || One million seconds
|-
| Sep 2 || One nonstop bike ride from NYC to LA
|-
| Sep 3 || 1⁄1,000th of a generation
|-
| Sep 4 || 777,777 seconds
|-
| Sep 5 || 100 viewings of ''Groundhog Day''
|-
| Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven)
|-
| Sep 7 || One pico-universe-lifetime
|-
| Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks
|-
| Sep 9 || One centiyear
|-
| Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times
|-
| Sep 11 || ''Speed'' (1994) played at one frame per second
|-
| Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1)
|-
| Sep 13 || ''What If? 2'' release day
|}
{{comic discussion}}
[[Category:Book promotion]]
[[Category:Comics featuring real people]]
[[Category:Songs]]
[[Category:Animals]]

2636: What If? 2 Countdown

2022-06-24T19:49:47Z

162.158.166.183: /* Explanation */ Star Trek is a weird case

{{comic
| number = 2636
| date = June 22, 2022
| title = What If? 2 Countdown
| image = what_if_2_countdown.png
| titletext = If you don't end the 99 Bottles of Beer recursion at N=0 it just becomes The Other Song That Never Ends.
}}

==Explanation==
{{incomplete|Created by FOUR SCORE AND 7 BOTTLES OF BEER ON THE WALL - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
This comic takes the idea of {{w|Advent calendar}}s, and takes it to the extreme. It uses rather absurd and/or obscure ways to measure the amount of time until [[Randall]]'s new book ''What if? 2'' is released, with esoteric units or esoteric numbers. And often both.

Some concepts that appear several times throughout the calendar are:

* '''{{w|SI prefixes}}''', which can be applied to the beginning of a unit's name to multiply or divide the unit by powers of 10 or 1,000. This is standard for units like meters and grams, but is rarely applied to measurements of time other than when a unit of less than one second is needed, most commonly in various fields of science and engineering such as physics and electronics.
* The '''{{w|Gettysburg Address}}''', a famous speech delivered by U.S. president Abraham Lincoln in 1863, where he began by referring to the signing of the Declaration of Independence taking place "four score and seven years ago". A score is a dated term for the number 20, so "four score and seven" is equivalent to 87.
* A '''dog year''' is traditionally considered to be one-seventh the length of a normal human year, since a dog's overall lifespan is roughly one-seventh of a typical human's. The comic applies this to other units of time, such as minutes and months, each of which is also one-seventh the length of the standard unit. The number 7 (traditionally a "lucky number") is also used in many of the numbers quoted in the calendar.
* Other comparative durations of time that are not normally or usefully applied to day-length multiples. At the top end, there is the age of the universe, at the other there is {{w|Planck_units#Planck_time|Planck-time}} – with entire durations of periods of human history and the time needed to watch popular TV/film franchises in-between – most of which require a non-trivial multiplier or divisor to bring them to the necessary scale required.
* A '''{{w|baker's dozen}}''' is 13, or one more than a normal dozen. Here, the "baker's" prefix can be applied to any unit by adding an extra one of its constituent parts, like an extra hour added to a day.
* '''{{w|Irrational numbers}}''' like {{w|pi}} (3.14159...), {{w|Euler's number}} or ''e'' (2.71828...), the {{w|golden ratio}} (1.61803...), and the {{w|square root of 2}} (1.41421...). These are all interesting numbers because of their mathematical properties, but very impractical to use as arbitrary measurements of time because they have an endless series of non-repeating decimal digits.
* The teenage dating game '''{{w|Seven minutes in heaven}}'''.
* Rotation and revolution periods of various planets and moons in the Solar System.

{| class="wikitable"
|-
! Days left !! Date !! Duration specified !! Duration in days !! Explanation
|-
| 83 || Jun 22 || πe millidecades || 82.03 days || π ≈ 3.14159, e ≈ 2.718, so πe is about 22.459. A millidecade is 1/1000 decade, or 1/100 year, or 3.652425 days. Multiplying these results in 82.03 days. This is a play on {{w|Euler's identity}}, eiπ=-1, but raising pi to the power of e instead.
|-
| 82 || Jun 23 || 7 megaseconds || 81.02 days || 7,000,000 seconds
|-
| 81 || Jun 24 || e lunar months || 80.27 days || A lunar month ≈ 29.53059 days, e ≈ 2.718
|-
| 80 || Jun 25 || 60 rotations of Foucault's pendulum in Paris || 79.67 days || '''{{w|Paris}}''' is the capital city of '''{{w|France}}''' and it's located at a latitude of 48º 51' 23" N. '''{{w|Foucault's pendulum}}''' is a device conceived by French physicist '''{{w|Léon Foucault}}''', consisting of a pendulum that is free to rotate its plane of oscillation. When placed in a rotating '''{{w|Non-inertial reference frame}}''' such as the '''{{w|Earth}}''', that has an associated rotation period of 24 hours, the oscillation plane of Foucault's pendulum rotates at a rate determined by the Earth's period and the angle between the rotation axis of the frame of reference and the direction of its elongation in resting position, i.e. its latitude, with a period T = T🜨/sin(λ), being T🜨 Earth's period and λ the latitude of the pendulum. Historically, Léon Foucault performed this experiment in the city of Paris, most famously (although not for the first time, which happened at the '''{{w|Paris Observatory}}''') under the dome of the '''{{w|Panthéon}}''', to demonstrate Earth's rotation. At this latitude, Foucault's pendulum completes a full rotation every 31.8 hours.
|-
| 79 || Jun 26 || 8 milligenerations || 78.89 days || A generation is in general 22-33 years, with a reasonable mid-point of 27; and 8 x 0.001 (milli) x 365.2425 (accounting for leap years) x 27 ≈ 78.89 days
|-
| 78 || Jun 27 || 777,777 dog minutes || 77.16 days || A popular myth is that dogs age 7 times faster than humans, so 1 dog minute equals 1/7 human minutes.
|-
| 77 || Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads) || 77 days || 7!=7x6x5x4x3x2x1=5040 - The standard episode of ''Jeopardy'' is 22-26 minutes skipping ads - taking the lowest value you get 110880 minutes total, which is the exact value needed.
|-
| 76 || Jun 29 || 5,000 repeats of ''99 Bottles of Beer'' || 76.39 days || Each verse of {{w|99 Bottles of Beer}} is "''N'' bottles of beer on the wall, ''N'' bottles of beer. Take one down, pass it around, ''N-1'' bottles of beer on the wall." The entire song contains 99 verses. Randall apparently sings this rather slowly at around 72 bpm, taking about 13 seconds per verse.
|-
| 75 || Jun 30 || 5 baker's fortnights || 75 days || A {{w|baker's dozen}} is a dozen (12) plus 1 extra item. Randall has generalized this to adding 1 to any unit. A fortnight is 2 weeks, so a baker's fortnight is 15 days. 5x15 is 75 days.
|-
| 74 || Jul 1 || √2 dog years || 73.79 days || See day 78 (Jun 27)
|-
| 73 || Jul 2 || π millivics (1/1000th of Queen Victoria's reign) || 72.97 days || {{w|Queen Victoria}} ruled between 20 June 1837 and 22 January 1901 (23,226 days).
|-
| 72 || Jul 3 || 42 drives from NYC to LA (Google Maps estimate) || 71.75 days || According to Google Maps, the drive from New York City to Los Angeles via I-80 W (2789 miles or 4489 km) takes 41 hours.
|-
| 71 || Jul 4 || 1,000 viewings of ''Groundhog Day''|| 70.14 days || Using {{w|Groundhog Day (film)|Groundhog Day's}} 101-minute run time.
|-
| 70 || Jul 5 || 100,000 minutes || 69.44 days ||
|-
| 69 || Jul 6 || 1/10th of Martian year || 68.70 Earth days || Martian sidereal and tropical years both round to 687.0 Earth days
|-
| 68 || Jul 7 || 1,234,567 sound-miles || 67.63 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 67.6349058 days.
|-
| 67 || Jul 8 || 2πe seconds || 66.74 days || 2^(π^e) = 5,766,073 seconds
|-
| 66 || Jul 9 || 216 beats (Swatch Internet Time) || 65.54 days || {{w|.beat}} is equal to 1/1000 day.
|-
| 65 || Jul 10 || 1,000 ISS orbits || 64.58 days || Each orbit of the ISS takes 90-93 minutes. Here a value of 93 minutes is used.
|-
| 64 || Jul 11 || Five hundred twenty five thousand (base seven) minutes|| 62.88 days || This refers to {{w|radix}}-7 arithmetic: 525,0007 minutes = 90,55210 minutes. Also references the opening and recurring line "Five hundred twenty five thousand six hundred minutes" from {{w|Seasons of Love}}, a song from the musical {{w|Rent (musical)|''Rent''}}, which is also referenced in [[1047: Approximations]]. "base seven" has the same rhythm as "six hundred".
|-
| 63 || Jul 12 || 1050 Planck times || 62.38 days || 10^50 x 5.39 x 10^-44 seconds
|-
| 62 || Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)|| 62.50 days || {{w|The Office (British TV series)|''The Office''}} was originally a {{w|BBC}} television show which had no commercial breaks, but Randall is obviously more familiar with the {{w|The_Office_(American_TV_series)|US version}}. This US "half-hour" comedy format contains 22.5 minutes of content (including the title sequence) and 7.5 minutes of ads. 
|-
| 61 || Jul 14 || Four score and seven kilominutes || 60.42 days || 87 x 1000 minutes
|-
| 60 || Jul 15 || 2 lunar months || 59.06 days || There are a number of different ways to define the {{w|lunar month}}. The most common is the synodic month, because it relates to the phases of the moon, and it's approximately 29.53 days.
|-
| 59 || Jul 16 || Half a day on Venus || 58.375 days || A Venus synodic day is 116 days 18 hours.
|-
| 58 || Jul 17 || 5 megaseconds || 57.87 days || 5,000,000 seconds
|-
| 57 || Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature) || 4681~4763 years × 10-6 || Randall is stating that "literature" was invented approximately 2700 BCE. This is consistent with the earliest surviving coherent Sumerian texts, but the earliest proto-writing likely developed at least 500 years earlier according to {{w|History of writing}}.
|-
| 56 || Jul 19 || 1,000 viewings of ''Run Lola Run'' || 55.57 days || Using {{w|Run Lola Run|the movie's}} run time of 80 minutes.
|-
| 55 || Jul 20 || One million sound-miles || 54.78 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 54.7843137 days.
|-
| 54 || Jul 21 || 30 Ionian months || 53.07 days || Orbital period of Io around Jupiter is approximately 1.77 days.
|-
| 53 || Jul 22 || One dog year || 52.18 days || See day 78 (Jun 27)
|-
| 52 || Jul 23 || 60 viewings of ''Star Wars Episodes I-IX'' || 51.75 days || According to [https://dorksideoftheforce.com/2021/05/04/how-long-to-watch-every-star-wars-movie/ Fansided] the combined running times are 20 hours 42 minutes.
|-
| 51 || Jul 24 || 1/100,000,000,000th of the universe's age || 50.40 days || The universe is estimated to be about 13.8 billion years old.
|-
| 50 || Jul 25 || 5 milli-generations || 49.3 days || See day 79 (Jun 26)
|-
| 49 || Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven'' || 48.61 days || {{w|Seven minutes in heaven}} is an Anglo-culture teenager game, occuring in several movies. 10,000 minutes in Heaven is almost a week of making out (or doing whatever in a broom closet), so this game is unlikely.
|-
| 48 || Jul 27 || φeπ minutes || 47.62 days || 68,567.57 minutes
|-
| 47 || Jul 28 || 4 megaseconds || 46.30 days || 4,000,000 seconds
|-
| 46 || Jul 29 || 216 minutes || 45.51 days || 65,536 minutes
|-
| 45 || Jul 30 || eee seconds || 44.15 days || 3,814,279.10 seconds
|-
| 44 || Jul 31 || π fortnights|| 43.98 days || 3.14159 x 14 days
|-
| 43 || Aug 1 || One devil's spacewalk (666 orbits of the ISS) || 43.01 days || See day 65 (Jul 10). 666 is the {{w|number of the beast}}.
|-
| 42 || Aug 2 || 1 kilowatt-hour per watt || 41.66 days || 1000 hours
|-
| 41 || Aug 3 || eπ Ionian months || 40.94 days || Orbital period of Io around Jupiter is 1.769137786 days
|-
| 40 || Aug 4 || 30 rotations of Foucault's pendulum in Paris || 39.84 days || Refer to Day 80 (Jun 25)
|-
| 39 || Aug 5 || e fortnights || 38.06 days ||2.71828 x 14 days
|-
| 38 || Aug 6 || πe baker's days (25 hours) || 37.98 days || See day 75 (Jun 30)
|-
| 37 || Aug 7 || One deciyear || 36.52 days || One tenth of one year
|-
| 36 || Aug 8 || 7! milliweeks || 35.28 days || 5040 × 0.001 weeks
|-
| 35 || Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music || 34.72 days || ''Think'' is the music played while the contestants try to answer the Final Jeopardy question; it is 30 seconds long.
|-
| 34 || Aug 10 || 1000 basketball games (game time) || 33.33 days || Uses the NBA game time of four 12-minute quarters, or 48 minutes
|-
| 33 || Aug 11 || 777 hours || 32.38 days ||
|-
| 32 || Aug 12 || One millilincoln (1/1000 of fourscore and seven years) || 31.78 days || {{w|Abraham Lincoln}}'s {{w|Gettysburg Address}} begins with the famous phrase "Four score and seven years ago". 1 score = twenty. 
|-
| 31 || Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads) || 31.25 days || Uses a television 'hour' containing 45 minutes of content and 15 minutes of ads
|-
| 30 || Aug 14 || All of ''Star Trek'', consecutively || 27.16* days || As per [https://redshirtsalwaysdie.com/2021/01/22/take-far-longer-watch-star-trek-think/ RedShirtsAlwaysDie.com] of January 22, 2001. *Note well: dozens of additional ''Star Trek'' franchise episodes have been produced since, and are presently scheduled to be released through June, July, and August, so this value is somewhat indeterminate over the scope of the countdown.
|-
| 29 || Aug 15 || 777,777 nanocenturies || 28.41 days || 777,777 × 10-9 × 100 years
|-
| 28 || Aug 16 || One sidereal lunar month || 27.3 days || The time it takes moon to return to the same position relative to the fixed stars
|-
| 27 || Aug 17 || 6 dog months || 26.1 days || See day 78 (Jun 27)
|-
| 26 || Aug 18 || ππ kilominutes || 25.32 days || 36,462.16 minutes
|-
| 25 || Aug 19 || 7 games of 7! minutes in Heaven || 24.5 days || 7 x 5040 (7 {{w|Factorial}}) minutes. See also day 49 (Jul 26).
|-
| 24 || Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy || 23.82 days || ''The Fellowship of the Ring'' extended version is 208 minutes, ''The Two Towers'' is 226 minutes, and ''The Return of the King'' is 252 minutes for its e.v., according to [https://fictionhorizon.com/how-long-are-all-the-lord-of-the-rings-and-the-hobbit-movies-combined/ FictionHorizon.com]
|-
| 23 || Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times || 22.21 days || See day 72 (Jul 3). This is for 6 round-trips and 1 one-way trip.
|-
| 22 || Aug 22 || ''It's a Small World'' sung at 1/10,000th speed || 21.18 days || {{w|It's a Small World}} is a song that was composed for the attraction of the same name at various {{w|Disney}} theme parks, and plays continuously at them in various languages.
|-
| 21 || Aug 23 || 500 hours || 20.83 days ||
|-
| 20 || Aug 24 || √2 fortnights || 19.80 days || 1.4142 × 14 days
|-
| 19 || Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles || 18.94 days || {{w|Vanessa Carlton}} is an American singer, and {{w|A Thousand Miles}} is her most successful song. Randall estimates her walking speed at about 2.2 miles/hour.
|-
| 18 || Aug 26 || 100,000 breaths || 15 seconds per breath for 17 days || Normal respiratory rate for adults is typically 12-20 breaths per minute, or abou 3-4 seconds each. Randall may be a practitioner of "slow breathing".
|-
| 17 || Aug 27 || √2 megaseconds || 16.37 days || 1.4142 × 1,000,000 seconds
|-
| 16 || Aug 28 || πππ πcoseconds || 15.51 days || 1.3402 × 1018 picoseconds (i.e., 10-12 seconds), making a joke how the mathematical "pi" is written with the character "π"
|-
| 15 || Aug 29 || One baker's fortnight (15 days) || 15 days || See day 75 (Jun 30)
|-
| 14 || Aug 30 || One baker's dozen (13) baker's days (25 hours) || 13.54 days || 325 hours; see day 75 (Jun 30)
|-
| 13 || Aug 31 || 300 hours || 12.5 days ||
|-
| 12 || Sep 1 || One million seconds || 11.57 days ||
|-
| 11 || Sep 2 || One nonstop bike ride from NYC to LA || 10.54 days || Google maps estimates the trip at 253 hours
|-
| 10 || Sep 3 || 1⁄1,000th of a generation || 9.86 days || See day 79 (Jun 26)
|-
| 9 || Sep 4 || 777,777 seconds || 9.002 days ||
|-
| 8 || Sep 5 || 100 viewings of ''Groundhog Day'' || 7.01 days || See Day 71 (Jul 4).
|-
| 7 || Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven) || 6.04 days || 8,700 minutes
|-
| 6 || Sep 7 || One pico-universe-lifetime || 5.04 days || See Day 51 (Jul 24)
|-
| 5 || Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks || 4.63 days || The chorus lasts about 8 seconds per 'person'
|-
| 4 || Sep 9 || One centiyear || 3.65 days || 365.24 days/100
|-
| 3 || Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times || 2.79 days || Based on a length of 4 minutes, 1 second
|-
| 2 || Sep 11 || ''Speed'' (1994) played at one frame per second || 1.9 days || {{w|Speed_(1994_film)}} has runtime of 116 minutes = 6,960 seconds = 167,040 film frames at standard frame rate of 24 frames/second
|-
| 1 || Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1) || 0.76 days || Each iteration contains ''N'' verses. ''N + N-1 + N-2 ... + 1'' equals ''N * (N+1) / 2'', so 99 recursions = 4950 verses. Using the same 13-second (72 bpm) rate as Jun 29, this is close to 18 hours. Probably refers to Donald Knuth's article {{w|The Complexity of Songs}}.
|-
| 0 || Sep 13 || ''What If? 2'' release day || N/A ||
|}

The title text refers to the recursive time period on Sep 12. If you don't stop when you reach N=0 bottles, the repetition never ends, so that time interval becomes infinite. He likens it to {{w|The Song That Never Ends}}, another repetitive children's song, which is specifically intended to go on forever. The difference is that the Beer song has a natural stopping point at 0, while ''The Song That Never Ends'' is completely repetitive.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

Large heading: Countdown to ''What if? 2''

Subheading: (Preorder at [https://xkcd.com/whatif2 xkcd.com/whatif2] to get it at the end of the countdown)

Remainder of comic is a calendar with the date in one corner of each day's box.

{| class="wikitable"
|-
! Date !! Description
|-
| Jun 22 || πe millidecades
|-
| Jun 23 || 7 megaseconds
|-
| Jun 24 || e lunar months
|-
| Jun 25 || 60 rotations of Foucault's pendulum in Paris
|-
| Jun 26 || 8 milligenerations
|-
| Jun 27 || 777,777 dog minutes
|-
| Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads)
|-
| Jun 29 || 5,000 repeats of ''99 Bottles of Beer''
|-
| Jun 30 || 5 baker's fortnights (15 days)
|-
| Jul 1 || √2 dog years
|-
| Jul 2 || π millivics (1/1000th of Queen Victoria's reign)
|-
| Jul 3 || 42 drives from NYC to LA (Google Maps estimate)
|-
| Jul 4 || 1,000 viewings of ''Groundhog Day''
|-
| Jul 5 || 100,000 minutes
|-
| Jul 6 || 1/10th of Martian year
|-
| Jul 7 || 1,234,567 sound-miles
|-
| Jul 8 || 2πe seconds
|-
| Jul 9 || 216 beats (Swatch Internet Time)
|-
| Jul 10 || 1,000 ISS orbits
|-
| Jul 11 || Five hundred twenty five thousand (base seven) minutes (text preceded by several drawn musical notes)
|-
| Jul 12 || 1050 Planck times
|-
| Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)
|-
| Jul 14 || Four score and seven kilominutes
|-
| Jul 15 || 2 lunar months
|-
| Jul 16 || Half a day on Venus
|-
| Jul 17 || 5 megaseconds
|-
| Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature)
|-
| Jul 19 || 1,000 viewings of ''Run Lola Run''
|-
| Jul 20 || One million sound-miles
|-
| Jul 21 || 30 Ionian months
|-
| Jul 22 || One dog year
|-
| Jul 23 || 60 viewings of ''Star Wars Episodes I-IX''
|-
| Jul 24 || 1/100,000,000,000th of the universe's age
|-
| Jul 25 || 5 milli-generations
|-
| Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven''
|-
| Jul 27 || φeπ minutes
|-
| Jul 28 || 4 megaseconds
|-
| Jul 29 || 216 minutes
|-
| Jul 30 || eee seconds
|-
| Jul 31 || π fortnights
|-
| Aug 1 || one devil's spacewalk (666 orbits of the ISS)
|-
| Aug 2 || 1 kilowatt-hour per watt
|-
| Aug 3 || eπ Ionian months
|-
| Aug 4 || 30 rotations of Foucault's pendulum in Paris
|-
| Aug 5 || e fortnights
|-
| Aug 6 || πe baker's days (25 hours)
|-
| Aug 7 || one deciyear
|-
| Aug 8 || 7! milliweeks
|-
| Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music
|-
| Aug 10 || 1000 basketball games (game time)
|-
| Aug 11 || 777 hours
|-
| Aug 12 || one millilincoln (1/1000 of fourscore and seven years)
|-
| Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads)
|-
| Aug 14 || All of ''Star Trek'', consecutively
|-
| Aug 15 || 777,777 nanocenturies
|-
| Aug 16 || one sidereal lunar month
|-
| Aug 17 || 6 dog months
|-
| Aug 18 || ππ kilominutes
|-
| Aug 19 || 7 games of ''7! minutes in Heaven''
|-
| Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy
|-
| Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times
|-
| Aug 22 || ''It's a Small World'' sung at 1/10,000th speed
|-
| Aug 23 || 500 hours
|-
| Aug 24 || √2 fortnights
|-
| Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles
|-
| Aug 26 || 100,000 breaths
|-
| Aug 27 || √2 megaseconds
|-
| Aug 28 || πππ πcoseconds
|-
| Aug 29 || One baker's fortnight (15 days)
|-
| Aug 30 || One baker's dozen (13) baker's days (25 hours)
|-
| Aug 31 || 300 hours
|-
| Sep 1 || One million seconds
|-
| Sep 2 || One nonstop bike ride from NYC to LA
|-
| Sep 3 || 1⁄1,000th of a generation
|-
| Sep 4 || 777,777 seconds
|-
| Sep 5 || 100 viewings of ''Groundhog Day''
|-
| Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven)
|-
| Sep 7 || One pico-universe-lifetime
|-
| Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks
|-
| Sep 9 || One centiyear
|-
| Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times
|-
| Sep 11 || ''Speed'' (1994) played at one frame per second
|-
| Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1)
|-
| Sep 13 || ''What If? 2'' release day
|}
{{comic discussion}}
[[Category:Book promotion]]
[[Category:Comics featuring real people]]
[[Category:Songs]]
[[Category:Animals]]

2636: What If? 2 Countdown

2022-06-24T19:42:39Z

162.158.166.183: /* Explanation */ round to two sig digits for days

{{comic
| number = 2636
| date = June 22, 2022
| title = What If? 2 Countdown
| image = what_if_2_countdown.png
| titletext = If you don't end the 99 Bottles of Beer recursion at N=0 it just becomes The Other Song That Never Ends.
}}

==Explanation==
{{incomplete|Created by FOUR SCORE AND 7 BOTTLES OF BEER ON THE WALL - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
This comic takes the idea of {{w|Advent calendar}}s, and takes it to the extreme. It uses rather absurd and/or obscure ways to measure the amount of time until [[Randall]]'s new book ''What if? 2'' is released, with esoteric units or esoteric numbers. And often both.

Some concepts that appear several times throughout the calendar are:

* '''{{w|SI prefixes}}''', which can be applied to the beginning of a unit's name to multiply or divide the unit by powers of 10 or 1,000. This is standard for units like meters and grams, but is rarely applied to measurements of time other than when a unit of less than one second is needed, most commonly in various fields of science and engineering such as physics and electronics.
* The '''{{w|Gettysburg Address}}''', a famous speech delivered by U.S. president Abraham Lincoln in 1863, where he began by referring to the signing of the Declaration of Independence taking place "four score and seven years ago". A score is a dated term for the number 20, so "four score and seven" is equivalent to 87.
* A '''dog year''' is traditionally considered to be one-seventh the length of a normal human year, since a dog's overall lifespan is roughly one-seventh of a typical human's. The comic applies this to other units of time, such as minutes and months, each of which is also one-seventh the length of the standard unit. The number 7 (traditionally a "lucky number") is also used in many of the numbers quoted in the calendar.
* Other comparative durations of time that are not normally or usefully applied to day-length multiples. At the top end, there is the age of the universe, at the other there is {{w|Planck_units#Planck_time|Planck-time}} – with entire durations of periods of human history and the time needed to watch popular TV/film franchises in-between – most of which require a non-trivial multiplier or divisor to bring them to the necessary scale required.
* A '''{{w|baker's dozen}}''' is 13, or one more than a normal dozen. Here, the "baker's" prefix can be applied to any unit by adding an extra one of its constituent parts, like an extra hour added to a day.
* '''{{w|Irrational numbers}}''' like {{w|pi}} (3.14159...), {{w|Euler's number}} or ''e'' (2.71828...), the {{w|golden ratio}} (1.61803...), and the {{w|square root of 2}} (1.41421...). These are all interesting numbers because of their mathematical properties, but very impractical to use as arbitrary measurements of time because they have an endless series of non-repeating decimal digits.
* The teenage dating game '''{{w|Seven minutes in heaven}}'''.
* Rotation and revolution periods of various planets and moons in the Solar System.

{| class="wikitable"
|-
! Days left !! Date !! Duration specified !! Duration in days !! Explanation
|-
| 83 || Jun 22 || πe millidecades || 82.03 days || π ≈ 3.14159, e ≈ 2.718, so πe is about 22.459. A millidecade is 1/1000 decade, or 1/100 year, or 3.652425 days. Multiplying these results in 82.03 days. This is a play on {{w|Euler's identity}}, eiπ=-1, but raising pi to the power of e instead.
|-
| 82 || Jun 23 || 7 megaseconds || 81.02 days || 7,000,000 seconds
|-
| 81 || Jun 24 || e lunar months || 80.27 days || A lunar month ≈ 29.53059 days, e ≈ 2.718
|-
| 80 || Jun 25 || 60 rotations of Foucault's pendulum in Paris || 79.67 days || '''{{w|Paris}}''' is the capital city of '''{{w|France}}''' and it's located at a latitude of 48º 51' 23" N. '''{{w|Foucault's pendulum}}''' is a device conceived by French physicist '''{{w|Léon Foucault}}''', consisting of a pendulum that is free to rotate its plane of oscillation. When placed in a rotating '''{{w|Non-inertial reference frame}}''' such as the '''{{w|Earth}}''', that has an associated rotation period of 24 hours, the oscillation plane of Foucault's pendulum rotates at a rate determined by the Earth's period and the angle between the rotation axis of the frame of reference and the direction of its elongation in resting position, i.e. its latitude, with a period T = T🜨/sin(λ), being T🜨 Earth's period and λ the latitude of the pendulum. Historically, Léon Foucault performed this experiment in the city of Paris, most famously (although not for the first time, which happened at the '''{{w|Paris Observatory}}''') under the dome of the '''{{w|Panthéon}}''', to demonstrate Earth's rotation. At this latitude, Foucault's pendulum completes a full rotation every 31.8 hours.
|-
| 79 || Jun 26 || 8 milligenerations || 78.89 days || A generation is in general 22-33 years, with a reasonable mid-point of 27; and 8 x 0.001 (milli) x 365.2425 (accounting for leap years) x 27 ≈ 78.89 days
|-
| 78 || Jun 27 || 777,777 dog minutes || 77.16 days || A popular myth is that dogs age 7 times faster than humans, so 1 dog minute equals 1/7 human minutes.
|-
| 77 || Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads) || 77 days || 7!=7x6x5x4x3x2x1=5040 - The standard episode of ''Jeopardy'' is 22-26 minutes skipping ads - taking the lowest value you get 110880 minutes total, which is the exact value needed.
|-
| 76 || Jun 29 || 5,000 repeats of ''99 Bottles of Beer'' || 76.39 days || Each verse of {{w|99 Bottles of Beer}} is "''N'' bottles of beer on the wall, ''N'' bottles of beer. Take one down, pass it around, ''N-1'' bottles of beer on the wall." The entire song contains 99 verses. Randall apparently sings this rather slowly at around 72 bpm, taking about 13 seconds per verse.
|-
| 75 || Jun 30 || 5 baker's fortnights || 75 days || A {{w|baker's dozen}} is a dozen (12) plus 1 extra item. Randall has generalized this to adding 1 to any unit. A fortnight is 2 weeks, so a baker's fortnight is 15 days. 5x15 is 75 days.
|-
| 74 || Jul 1 || √2 dog years || 73.79 days || See day 78 (Jun 27)
|-
| 73 || Jul 2 || π millivics (1/1000th of Queen Victoria's reign) || 72.97 days || {{w|Queen Victoria}} ruled between 20 June 1837 and 22 January 1901 (23,226 days).
|-
| 72 || Jul 3 || 42 drives from NYC to LA (Google Maps estimate) || 71.75 days || According to Google Maps, the drive from New York City to Los Angeles via I-80 W (2789 miles or 4489 km) takes 41 hours.
|-
| 71 || Jul 4 || 1,000 viewings of ''Groundhog Day''|| 70.14 days || Using {{w|Groundhog Day (film)|Groundhog Day's}} 101-minute run time.
|-
| 70 || Jul 5 || 100,000 minutes || 69.44 days ||
|-
| 69 || Jul 6 || 1/10th of Martian year || 68.70 Earth days || Martian sidereal and tropical years both round to 687.0 Earth days
|-
| 68 || Jul 7 || 1,234,567 sound-miles || 67.63 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 67.6349058 days.
|-
| 67 || Jul 8 || 2πe seconds || 66.74 days || 2^(π^e) = 5,766,073 seconds
|-
| 66 || Jul 9 || 216 beats (Swatch Internet Time) || 65.54 days || {{w|.beat}} is equal to 1/1000 day.
|-
| 65 || Jul 10 || 1,000 ISS orbits || 64.58 days || Each orbit of the ISS takes 90-93 minutes. Here a value of 93 minutes is used.
|-
| 64 || Jul 11 || Five hundred twenty five thousand (base seven) minutes|| 62.88 days || This refers to {{w|radix}}-7 arithmetic: 525,0007 minutes = 90,55210 minutes. Also references the opening and recurring line "Five hundred twenty five thousand six hundred minutes" from {{w|Seasons of Love}}, a song from the musical {{w|Rent (musical)|''Rent''}}, which is also referenced in [[1047: Approximations]]. "base seven" has the same rhythm as "six hundred".
|-
| 63 || Jul 12 || 1050 Planck times || 62.38 days || 10^50 x 5.39 x 10^-44 seconds
|-
| 62 || Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)|| 62.50 days || {{w|The Office (British TV series)|''The Office''}} was originally a {{w|BBC}} television show which had no commercial breaks, but Randall is obviously more familiar with the {{w|The_Office_(American_TV_series)|US version}}. This US "half-hour" comedy format contains 22.5 minutes of content (including the title sequence) and 7.5 minutes of ads. 
|-
| 61 || Jul 14 || Four score and seven kilominutes || 60.42 days || 87 x 1000 minutes
|-
| 60 || Jul 15 || 2 lunar months || 59.06 days || There are a number of different ways to define the {{w|lunar month}}. The most common is the synodic month, because it relates to the phases of the moon, and it's approximately 29.53 days.
|-
| 59 || Jul 16 || Half a day on Venus || 58.375 days || A Venus synodic day is 116 days 18 hours.
|-
| 58 || Jul 17 || 5 megaseconds || 57.87 days || 5,000,000 seconds
|-
| 57 || Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature) || 4681~4763 years × 10-6 || Randall is stating that "literature" was invented approximately 2700 BCE. This is consistent with the earliest surviving coherent Sumerian texts, but the earliest proto-writing likely developed at least 500 years earlier according to {{w|History of writing}}.
|-
| 56 || Jul 19 || 1,000 viewings of ''Run Lola Run'' || 55.57 days || Using {{w|Run Lola Run|the movie's}} run time of 80 minutes.
|-
| 55 || Jul 20 || One million sound-miles || 54.78 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 54.7843137 days.
|-
| 54 || Jul 21 || 30 Ionian months || 53.07 days || Orbital period of Io around Jupiter is approximately 1.77 days.
|-
| 53 || Jul 22 || One dog year || 52.18 days || See day 78 (Jun 27)
|-
| 52 || Jul 23 || 60 viewings of ''Star Wars Episodes I-IX'' || 51.75 days || According to [https://dorksideoftheforce.com/2021/05/04/how-long-to-watch-every-star-wars-movie/ Fansided] the combined running times are 20 hours 42 minutes.
|-
| 51 || Jul 24 || 1/100,000,000,000th of the universe's age || 50.40 days || The universe is estimated to be about 13.8 billion years old.
|-
| 50 || Jul 25 || 5 milli-generations || 49.3 days || See day 79 (Jun 26)
|-
| 49 || Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven'' || 48.61 days || {{w|Seven minutes in heaven}} is an Anglo-culture teenager game, occuring in several movies. 10,000 minutes in Heaven is almost a week of making out (or doing whatever in a broom closet), so this game is unlikely.
|-
| 48 || Jul 27 || φeπ minutes || 47.62 days || 68,567.57 minutes
|-
| 47 || Jul 28 || 4 megaseconds || 46.30 days || 4,000,000 seconds
|-
| 46 || Jul 29 || 216 minutes || 45.51 days || 65,536 minutes
|-
| 45 || Jul 30 || eee seconds || 44.15 days || 3,814,279.10 seconds
|-
| 44 || Jul 31 || π fortnights|| 43.98 days || 3.14159 x 14 days
|-
| 43 || Aug 1 || One devil's spacewalk (666 orbits of the ISS) || 43.01 days || See day 65 (Jul 10). 666 is the {{w|number of the beast}}.
|-
| 42 || Aug 2 || 1 kilowatt-hour per watt || 41.66 days || 1000 hours
|-
| 41 || Aug 3 || eπ Ionian months || 40.94 days || Orbital period of Io around Jupiter is 1.769137786 days
|-
| 40 || Aug 4 || 30 rotations of Foucault's pendulum in Paris || 39.84 days || Refer to Day 80 (Jun 25)
|-
| 39 || Aug 5 || e fortnights || 38.06 days ||2.71828 x 14 days
|-
| 38 || Aug 6 || πe baker's days (25 hours) || 37.98 days || See day 75 (Jun 30)
|-
| 37 || Aug 7 || One deciyear || 36.52 days || One tenth of one year
|-
| 36 || Aug 8 || 7! milliweeks || 35.28 days || 5040 × 0.001 weeks
|-
| 35 || Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music || 34.72 days || ''Think'' is the music played while the contestants try to answer the Final Jeopardy question; it is 30 seconds long.
|-
| 34 || Aug 10 || 1000 basketball games (game time) || 33.33 days || Uses the NBA game time of four 12-minute quarters, or 48 minutes
|-
| 33 || Aug 11 || 777 hours || 32.38 days ||
|-
| 32 || Aug 12 || One millilincoln (1/1000 of fourscore and seven years) || 31.78 days || {{w|Abraham Lincoln}}'s {{w|Gettysburg Address}} begins with the famous phrase "Four score and seven years ago". 1 score = twenty. 
|-
| 31 || Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads) || 31.25 days || Uses a television 'hour' containing 45 minutes of content and 15 minutes of ads
|-
| 30 || Aug 14 || All of ''Star Trek'', consecutively || ||
|-
| 29 || Aug 15 || 777,777 nanocenturies || 28.41 days || 777,777 × 10-9 × 100 years
|-
| 28 || Aug 16 || One sidereal lunar month || 27.3 days || The time it takes moon to return to the same position relative to the fixed stars
|-
| 27 || Aug 17 || 6 dog months || 26.1 days || See day 78 (Jun 27)
|-
| 26 || Aug 18 || ππ kilominutes || 25.32 days || 36,462.16 minutes
|-
| 25 || Aug 19 || 7 games of 7! minutes in Heaven || 24.5 days || 7 x 5040 (7 {{w|Factorial}}) minutes. See also day 49 (Jul 26).
|-
| 24 || Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy || 23.82 days || ''The Fellowship of the Ring'' extended version is 208 minutes, ''The Two Towers'' is 226 minutes, and ''The Return of the King'' is 252 minutes for its e.v., according to [https://fictionhorizon.com/how-long-are-all-the-lord-of-the-rings-and-the-hobbit-movies-combined/ FictionHorizon.com]
|-
| 23 || Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times || 22.21 days || See day 72 (Jul 3). This is for 6 round-trips and 1 one-way trip.
|-
| 22 || Aug 22 || ''It's a Small World'' sung at 1/10,000th speed || 21.18 days || {{w|It's a Small World}} is a song that was composed for the attraction of the same name at various {{w|Disney}} theme parks, and plays continuously at them in various languages.
|-
| 21 || Aug 23 || 500 hours || 20.83 days ||
|-
| 20 || Aug 24 || √2 fortnights || 19.80 days || 1.4142 × 14 days
|-
| 19 || Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles || 18.94 days || {{w|Vanessa Carlton}} is an American singer, and {{w|A Thousand Miles}} is her most successful song. Randall estimates her walking speed at about 2.2 miles/hour.
|-
| 18 || Aug 26 || 100,000 breaths || 15 seconds per breath for 17 days || Normal respiratory rate for adults is typically 12-20 breaths per minute, or abou 3-4 seconds each. Randall may be a practitioner of "slow breathing".
|-
| 17 || Aug 27 || √2 megaseconds || 16.37 days || 1.4142 × 1,000,000 seconds
|-
| 16 || Aug 28 || πππ πcoseconds || 15.51 days || 1.3402 × 1018 picoseconds (i.e., 10-12 seconds), making a joke how the mathematical "pi" is written with the character "π"
|-
| 15 || Aug 29 || One baker's fortnight (15 days) || 15 days || See day 75 (Jun 30)
|-
| 14 || Aug 30 || One baker's dozen (13) baker's days (25 hours) || 13.54 days || 325 hours; see day 75 (Jun 30)
|-
| 13 || Aug 31 || 300 hours || 12.5 days ||
|-
| 12 || Sep 1 || One million seconds || 11.57 days ||
|-
| 11 || Sep 2 || One nonstop bike ride from NYC to LA || 10.54 days || Google maps estimates the trip at 253 hours
|-
| 10 || Sep 3 || 1⁄1,000th of a generation || 9.86 days || See day 79 (Jun 26)
|-
| 9 || Sep 4 || 777,777 seconds || 9.002 days ||
|-
| 8 || Sep 5 || 100 viewings of ''Groundhog Day'' || 7.01 days || See Day 71 (Jul 4).
|-
| 7 || Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven) || 6.04 days || 8,700 minutes
|-
| 6 || Sep 7 || One pico-universe-lifetime || 5.04 days || See Day 51 (Jul 24)
|-
| 5 || Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks || 4.63 days || The chorus lasts about 8 seconds per 'person'
|-
| 4 || Sep 9 || One centiyear || 3.65 days || 365.24 days/100
|-
| 3 || Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times || 2.79 days || Based on a length of 4 minutes, 1 second
|-
| 2 || Sep 11 || ''Speed'' (1994) played at one frame per second || 1.9 days || {{w|Speed_(1994_film)}} has runtime of 116 minutes = 6,960 seconds = 167,040 film frames at standard frame rate of 24 frames/second
|-
| 1 || Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1) || 0.76 days || Each iteration contains ''N'' verses. ''N + N-1 + N-2 ... + 1'' equals ''N * (N+1) / 2'', so 99 recursions = 4950 verses. Using the same 13-second (72 bpm) rate as Jun 29, this is close to 18 hours. Probably refers to Donald Knuth's article {{w|The Complexity of Songs}}.
|-
| 0 || Sep 13 || ''What If? 2'' release day || N/A ||
|}

The title text refers to the recursive time period on Sep 12. If you don't stop when you reach N=0 bottles, the repetition never ends, so that time interval becomes infinite. He likens it to {{w|The Song That Never Ends}}, another repetitive children's song, which is specifically intended to go on forever. The difference is that the Beer song has a natural stopping point at 0, while ''The Song That Never Ends'' is completely repetitive.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

Large heading: Countdown to ''What if? 2''

Subheading: (Preorder at [https://xkcd.com/whatif2 xkcd.com/whatif2] to get it at the end of the countdown)

Remainder of comic is a calendar with the date in one corner of each day's box.

{| class="wikitable"
|-
! Date !! Description
|-
| Jun 22 || πe millidecades
|-
| Jun 23 || 7 megaseconds
|-
| Jun 24 || e lunar months
|-
| Jun 25 || 60 rotations of Foucault's pendulum in Paris
|-
| Jun 26 || 8 milligenerations
|-
| Jun 27 || 777,777 dog minutes
|-
| Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads)
|-
| Jun 29 || 5,000 repeats of ''99 Bottles of Beer''
|-
| Jun 30 || 5 baker's fortnights (15 days)
|-
| Jul 1 || √2 dog years
|-
| Jul 2 || π millivics (1/1000th of Queen Victoria's reign)
|-
| Jul 3 || 42 drives from NYC to LA (Google Maps estimate)
|-
| Jul 4 || 1,000 viewings of ''Groundhog Day''
|-
| Jul 5 || 100,000 minutes
|-
| Jul 6 || 1/10th of Martian year
|-
| Jul 7 || 1,234,567 sound-miles
|-
| Jul 8 || 2πe seconds
|-
| Jul 9 || 216 beats (Swatch Internet Time)
|-
| Jul 10 || 1,000 ISS orbits
|-
| Jul 11 || Five hundred twenty five thousand (base seven) minutes (text preceded by several drawn musical notes)
|-
| Jul 12 || 1050 Planck times
|-
| Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)
|-
| Jul 14 || Four score and seven kilominutes
|-
| Jul 15 || 2 lunar months
|-
| Jul 16 || Half a day on Venus
|-
| Jul 17 || 5 megaseconds
|-
| Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature)
|-
| Jul 19 || 1,000 viewings of ''Run Lola Run''
|-
| Jul 20 || One million sound-miles
|-
| Jul 21 || 30 Ionian months
|-
| Jul 22 || One dog year
|-
| Jul 23 || 60 viewings of ''Star Wars Episodes I-IX''
|-
| Jul 24 || 1/100,000,000,000th of the universe's age
|-
| Jul 25 || 5 milli-generations
|-
| Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven''
|-
| Jul 27 || φeπ minutes
|-
| Jul 28 || 4 megaseconds
|-
| Jul 29 || 216 minutes
|-
| Jul 30 || eee seconds
|-
| Jul 31 || π fortnights
|-
| Aug 1 || one devil's spacewalk (666 orbits of the ISS)
|-
| Aug 2 || 1 kilowatt-hour per watt
|-
| Aug 3 || eπ Ionian months
|-
| Aug 4 || 30 rotations of Foucault's pendulum in Paris
|-
| Aug 5 || e fortnights
|-
| Aug 6 || πe baker's days (25 hours)
|-
| Aug 7 || one deciyear
|-
| Aug 8 || 7! milliweeks
|-
| Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music
|-
| Aug 10 || 1000 basketball games (game time)
|-
| Aug 11 || 777 hours
|-
| Aug 12 || one millilincoln (1/1000 of fourscore and seven years)
|-
| Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads)
|-
| Aug 14 || All of ''Star Trek'', consecutively
|-
| Aug 15 || 777,777 nanocenturies
|-
| Aug 16 || one sidereal lunar month
|-
| Aug 17 || 6 dog months
|-
| Aug 18 || ππ kilominutes
|-
| Aug 19 || 7 games of ''7! minutes in Heaven''
|-
| Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy
|-
| Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times
|-
| Aug 22 || ''It's a Small World'' sung at 1/10,000th speed
|-
| Aug 23 || 500 hours
|-
| Aug 24 || √2 fortnights
|-
| Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles
|-
| Aug 26 || 100,000 breaths
|-
| Aug 27 || √2 megaseconds
|-
| Aug 28 || πππ πcoseconds
|-
| Aug 29 || One baker's fortnight (15 days)
|-
| Aug 30 || One baker's dozen (13) baker's days (25 hours)
|-
| Aug 31 || 300 hours
|-
| Sep 1 || One million seconds
|-
| Sep 2 || One nonstop bike ride from NYC to LA
|-
| Sep 3 || 1⁄1,000th of a generation
|-
| Sep 4 || 777,777 seconds
|-
| Sep 5 || 100 viewings of ''Groundhog Day''
|-
| Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven)
|-
| Sep 7 || One pico-universe-lifetime
|-
| Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks
|-
| Sep 9 || One centiyear
|-
| Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times
|-
| Sep 11 || ''Speed'' (1994) played at one frame per second
|-
| Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1)
|-
| Sep 13 || ''What If? 2'' release day
|}
{{comic discussion}}
[[Category:Book promotion]]
[[Category:Comics featuring real people]]
[[Category:Songs]]
[[Category:Animals]]

2636: What If? 2 Countdown

2022-06-24T19:41:48Z

162.158.166.183: /* Explanation */ redundant

{{comic
| number = 2636
| date = June 22, 2022
| title = What If? 2 Countdown
| image = what_if_2_countdown.png
| titletext = If you don't end the 99 Bottles of Beer recursion at N=0 it just becomes The Other Song That Never Ends.
}}

==Explanation==
{{incomplete|Created by FOUR SCORE AND 7 BOTTLES OF BEER ON THE WALL - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
This comic takes the idea of {{w|Advent calendar}}s, and takes it to the extreme. It uses rather absurd and/or obscure ways to measure the amount of time until [[Randall]]'s new book ''What if? 2'' is released, with esoteric units or esoteric numbers. And often both.

Some concepts that appear several times throughout the calendar are:

* '''{{w|SI prefixes}}''', which can be applied to the beginning of a unit's name to multiply or divide the unit by powers of 10 or 1,000. This is standard for units like meters and grams, but is rarely applied to measurements of time other than when a unit of less than one second is needed, most commonly in various fields of science and engineering such as physics and electronics.
* The '''{{w|Gettysburg Address}}''', a famous speech delivered by U.S. president Abraham Lincoln in 1863, where he began by referring to the signing of the Declaration of Independence taking place "four score and seven years ago". A score is a dated term for the number 20, so "four score and seven" is equivalent to 87.
* A '''dog year''' is traditionally considered to be one-seventh the length of a normal human year, since a dog's overall lifespan is roughly one-seventh of a typical human's. The comic applies this to other units of time, such as minutes and months, each of which is also one-seventh the length of the standard unit. The number 7 (traditionally a "lucky number") is also used in many of the numbers quoted in the calendar.
* Other comparative durations of time that are not normally or usefully applied to day-length multiples. At the top end, there is the age of the universe, at the other there is {{w|Planck_units#Planck_time|Planck-time}} – with entire durations of periods of human history and the time needed to watch popular TV/film franchises in-between – most of which require a non-trivial multiplier or divisor to bring them to the necessary scale required.
* A '''{{w|baker's dozen}}''' is 13, or one more than a normal dozen. Here, the "baker's" prefix can be applied to any unit by adding an extra one of its constituent parts, like an extra hour added to a day.
* '''{{w|Irrational numbers}}''' like {{w|pi}} (3.14159...), {{w|Euler's number}} or ''e'' (2.71828...), the {{w|golden ratio}} (1.61803...), and the {{w|square root of 2}} (1.41421...). These are all interesting numbers because of their mathematical properties, but very impractical to use as arbitrary measurements of time because they have an endless series of non-repeating decimal digits.
* The teenage dating game '''{{w|Seven minutes in heaven}}'''.
* Rotation and revolution periods of various planets and moons in the Solar System.

{| class="wikitable"
|-
! Days left !! Date !! Duration specified !! Duration in days !! Explanation
|-
| 83 || Jun 22 || πe millidecades || 82.03 days || π ≈ 3.14159, e ≈ 2.718, so πe is about 22.459. A millidecade is 1/1000 decade, or 1/100 year, or 3.652425 days. Multiplying these results in 82.03 days. This is a play on {{w|Euler's identity}}, eiπ=-1, but raising pi to the power of e instead.
|-
| 82 || Jun 23 || 7 megaseconds || 81.02 days || 7,000,000 seconds
|-
| 81 || Jun 24 || e lunar months || 80.27 days || A lunar month ≈ 29.53059 days, e ≈ 2.718
|-
| 80 || Jun 25 || 60 rotations of Foucault's pendulum in Paris || 79.67 days || '''{{w|Paris}}''' is the capital city of '''{{w|France}}''' and it's located at a latitude of 48º 51' 23" N. '''{{w|Foucault's pendulum}}''' is a device conceived by French physicist '''{{w|Léon Foucault}}''', consisting of a pendulum that is free to rotate its plane of oscillation. When placed in a rotating '''{{w|Non-inertial reference frame}}''' such as the '''{{w|Earth}}''', that has an associated rotation period of 24 hours, the oscillation plane of Foucault's pendulum rotates at a rate determined by the Earth's period and the angle between the rotation axis of the frame of reference and the direction of its elongation in resting position, i.e. its latitude, with a period T = T🜨/sin(λ), being T🜨 Earth's period and λ the latitude of the pendulum. Historically, Léon Foucault performed this experiment in the city of Paris, most famously (although not for the first time, which happened at the '''{{w|Paris Observatory}}''') under the dome of the '''{{w|Panthéon}}''', to demonstrate Earth's rotation. At this latitude, Foucault's pendulum completes a full rotation every 31.8 hours.
|-
| 79 || Jun 26 || 8 milligenerations || 78.89 days || A generation is in general 22-33 years, with a reasonable mid-point of 27; and 8 x 0.001 (milli) x 365.2425 (accounting for leap years) x 27 ≈ 78.89 days
|-
| 78 || Jun 27 || 777,777 dog minutes || 77.16 days || A popular myth is that dogs age 7 times faster than humans, so 1 dog minute equals 1/7 human minutes.
|-
| 77 || Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads) || 77 days || 7!=7x6x5x4x3x2x1=5040 - The standard episode of ''Jeopardy'' is 22-26 minutes skipping ads - taking the lowest value you get 110880 minutes total, which is the exact value needed.
|-
| 76 || Jun 29 || 5,000 repeats of ''99 Bottles of Beer'' || 76.39 days || Each verse of {{w|99 Bottles of Beer}} is "''N'' bottles of beer on the wall, ''N'' bottles of beer. Take one down, pass it around, ''N-1'' bottles of beer on the wall." The entire song contains 99 verses. Randall apparently sings this rather slowly at around 72 bpm, taking about 13 seconds per verse.
|-
| 75 || Jun 30 || 5 baker's fortnights || 75 days || A {{w|baker's dozen}} is a dozen (12) plus 1 extra item. Randall has generalized this to adding 1 to any unit. A fortnight is 2 weeks, so a baker's fortnight is 15 days. 5x15 is 75 days.
|-
| 74 || Jul 1 || √2 dog years || 73.79 days || See day 78 (Jun 27)
|-
| 73 || Jul 2 || π millivics (1/1000th of Queen Victoria's reign) || 72.97 days || {{w|Queen Victoria}} ruled between 20 June 1837 and 22 January 1901 (23,226 days).
|-
| 72 || Jul 3 || 42 drives from NYC to LA (Google Maps estimate) || 71.75 days || According to Google Maps, the drive from New York City to Los Angeles via I-80 W (2789 miles or 4489 km) takes 41 hours.
|-
| 71 || Jul 4 || 1,000 viewings of ''Groundhog Day''|| 70.14 days || Using {{w|Groundhog Day (film)|Groundhog Day's}} 101-minute run time.
|-
| 70 || Jul 5 || 100,000 minutes || 69.44 days ||
|-
| 69 || Jul 6 || 1/10th of Martian year || 68.70 Earth days || Martian sidereal and tropical years both round to 687.0 Earth days
|-
| 68 || Jul 7 || 1,234,567 sound-miles || 67.63 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 67.6349058 days.
|-
| 67 || Jul 8 || 2πe seconds || 66.74 days || 2^(π^e) = 5,766,073 seconds
|-
| 66 || Jul 9 || 216 beats (Swatch Internet Time) || 65.54 days || {{w|.beat}} is equal to 1/1000 day.
|-
| 65 || Jul 10 || 1,000 ISS orbits || 64.58 days || Each orbit of the ISS takes 90-93 minutes. Here a value of 93 minutes is used.
|-
| 64 || Jul 11 || Five hundred twenty five thousand (base seven) minutes|| 62.88 days || This refers to {{w|radix}}-7 arithmetic: 525,0007 minutes = 90,55210 minutes. Also references the opening and recurring line "Five hundred twenty five thousand six hundred minutes" from {{w|Seasons of Love}}, a song from the musical {{w|Rent (musical)|''Rent''}}, which is also referenced in [[1047: Approximations]]. "base seven" has the same rhythm as "six hundred".
|-
| 63 || Jul 12 || 1050 Planck times || 62.38 days || 10^50 x 5.39 x 10^-44 seconds
|-
| 62 || Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)|| 62.50 days || {{w|The Office (British TV series)|''The Office''}} was originally a {{w|BBC}} television show which had no commercial breaks, but Randall is obviously more familiar with the {{w|The_Office_(American_TV_series)|US version}}. This US "half-hour" comedy format contains 22.5 minutes of content (including the title sequence) and 7.5 minutes of ads. 
|-
| 61 || Jul 14 || Four score and seven kilominutes || 60.42 days || 87 x 1000 minutes
|-
| 60 || Jul 15 || 2 lunar months || 59.06 days || There are a number of different ways to define the {{w|lunar month}}. The most common is the synodic month, because it relates to the phases of the moon, and it's approximately 29.53 days.
|-
| 59 || Jul 16 || Half a day on Venus || 58.375 days || A Venus synodic day is 116 days 18 hours.
|-
| 58 || Jul 17 || 5 megaseconds || 57.8704 days || 5,000,000 seconds
|-
| 57 || Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature) || 4681~4763 years × 10-6 || Randall is stating that "literature" was invented approximately 2700 BCE. This is consistent with the earliest surviving coherent Sumerian texts, but the earliest proto-writing likely developed at least 500 years earlier according to {{w|History of writing}}.
|-
| 56 || Jul 19 || 1,000 viewings of ''Run Lola Run'' || 55.556 days || Using {{w|Run Lola Run|the movie's}} run time of 80 minutes.
|-
| 55 || Jul 20 || One million sound-miles || 54.78 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 54.7843137 days.
|-
| 54 || Jul 21 || 30 Ionian months || 53.07 days || Orbital period of Io around Jupiter is approximately 1.77 days.
|-
| 53 || Jul 22 || One dog year || 52.18 days || See day 78 (Jun 27)
|-
| 52 || Jul 23 || 60 viewings of ''Star Wars Episodes I-IX'' || 51.75 days || According to [https://dorksideoftheforce.com/2021/05/04/how-long-to-watch-every-star-wars-movie/ Fansided] the combined running times are 20 hours 42 minutes.
|-
| 51 || Jul 24 || 1/100,000,000,000th of the universe's age || 50.40 days || The universe is estimated to be about 13.8 billion years old.
|-
| 50 || Jul 25 || 5 milli-generations || 49.3 days || See day 79 (Jun 26)
|-
| 49 || Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven'' || 48.61 days || {{w|Seven minutes in heaven}} is an Anglo-culture teenager game, occuring in several movies. 10,000 minutes in Heaven is almost a week of making out (or doing whatever in a broom closet), so this game is unlikely.
|-
| 48 || Jul 27 || φeπ minutes || 47.62 days || 68,567.57 minutes
|-
| 47 || Jul 28 || 4 megaseconds || 46.30 days || 4,000,000 seconds
|-
| 46 || Jul 29 || 216 minutes || 45.51 days || 65,536 minutes
|-
| 45 || Jul 30 || eee seconds || 44.15 days || 3,814,279.10 seconds
|-
| 44 || Jul 31 || π fortnights|| 43.98 days || 3.14159 x 14 days
|-
| 43 || Aug 1 || One devil's spacewalk (666 orbits of the ISS) || 43.01 days || See day 65 (Jul 10). 666 is the {{w|number of the beast}}.
|-
| 42 || Aug 2 || 1 kilowatt-hour per watt || 41.66 days || 1000 hours
|-
| 41 || Aug 3 || eπ Ionian months || 40.94 days || Orbital period of Io around Jupiter is 1.769137786 days
|-
| 40 || Aug 4 || 30 rotations of Foucault's pendulum in Paris || 39.84 days || Refer to Day 80 (Jun 25)
|-
| 39 || Aug 5 || e fortnights || 38.06 days ||2.71828 x 14 days
|-
| 38 || Aug 6 || πe baker's days (25 hours) || 37.98 days || See day 75 (Jun 30)
|-
| 37 || Aug 7 || One deciyear || 36.52 days || One tenth of one year
|-
| 36 || Aug 8 || 7! milliweeks || 35.28 days || 5040 × 0.001 weeks
|-
| 35 || Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music || 34.72 days || ''Think'' is the music played while the contestants try to answer the Final Jeopardy question; it is 30 seconds long.
|-
| 34 || Aug 10 || 1000 basketball games (game time) || 33.33 days || Uses the NBA game time of four 12-minute quarters, or 48 minutes
|-
| 33 || Aug 11 || 777 hours || 32.38 days ||
|-
| 32 || Aug 12 || One millilincoln (1/1000 of fourscore and seven years) || 31.78 days || {{w|Abraham Lincoln}}'s {{w|Gettysburg Address}} begins with the famous phrase "Four score and seven years ago". 1 score = twenty. 
|-
| 31 || Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads) || 31.25 days || Uses a television 'hour' containing 45 minutes of content and 15 minutes of ads
|-
| 30 || Aug 14 || All of ''Star Trek'', consecutively || ||
|-
| 29 || Aug 15 || 777,777 nanocenturies || 28.41 days || 777,777 × 10-9 × 100 years
|-
| 28 || Aug 16 || One sidereal lunar month || 27.3 days || The time it takes moon to return to the same position relative to the fixed stars
|-
| 27 || Aug 17 || 6 dog months || 26.1 days || See day 78 (Jun 27)
|-
| 26 || Aug 18 || ππ kilominutes || 25.32 days || 36,462.16 minutes
|-
| 25 || Aug 19 || 7 games of 7! minutes in Heaven || 24.5 days || 7 x 5040 (7 {{w|Factorial}}) minutes. See also day 49 (Jul 26).
|-
| 24 || Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy || 23.82 days || ''The Fellowship of the Ring'' extended version is 208 minutes, ''The Two Towers'' is 226 minutes, and ''The Return of the King'' is 252 minutes for its e.v., according to [https://fictionhorizon.com/how-long-are-all-the-lord-of-the-rings-and-the-hobbit-movies-combined/ FictionHorizon.com]
|-
| 23 || Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times || 22.21 days || See day 72 (Jul 3). This is for 6 round-trips and 1 one-way trip.
|-
| 22 || Aug 22 || ''It's a Small World'' sung at 1/10,000th speed || 21.18 days || {{w|It's a Small World}} is a song that was composed for the attraction of the same name at various {{w|Disney}} theme parks, and plays continuously at them in various languages.
|-
| 21 || Aug 23 || 500 hours || 20.83 days ||
|-
| 20 || Aug 24 || √2 fortnights || 19.80 days || 1.4142 × 14 days
|-
| 19 || Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles || 18.94 days || {{w|Vanessa Carlton}} is an American singer, and {{w|A Thousand Miles}} is her most successful song. Randall estimates her walking speed at about 2.2 miles/hour.
|-
| 18 || Aug 26 || 100,000 breaths || 15 seconds per breath for 17 days || Normal respiratory rate for adults is typically 12-20 breaths per minute, or abou 3-4 seconds each. Randall may be a practitioner of "slow breathing".
|-
| 17 || Aug 27 || √2 megaseconds || 16.37 days || 1.4142 × 1,000,000 seconds
|-
| 16 || Aug 28 || πππ πcoseconds || 15.51 days || 1.3402 × 1018 picoseconds (i.e., 10-12 seconds), making a joke how the mathematical "pi" is written with the character "π"
|-
| 15 || Aug 29 || One baker's fortnight (15 days) || 15 days || See day 75 (Jun 30)
|-
| 14 || Aug 30 || One baker's dozen (13) baker's days (25 hours) || 13.54 days || 325 hours; see day 75 (Jun 30)
|-
| 13 || Aug 31 || 300 hours || 12.5 days ||
|-
| 12 || Sep 1 || One million seconds || 11.57 days ||
|-
| 11 || Sep 2 || One nonstop bike ride from NYC to LA || 10.54 days || Google maps estimates the trip at 253 hours
|-
| 10 || Sep 3 || 1⁄1,000th of a generation || 9.86 days || See day 79 (Jun 26)
|-
| 9 || Sep 4 || 777,777 seconds || 9.002 days ||
|-
| 8 || Sep 5 || 100 viewings of ''Groundhog Day'' || 7.01 days || See Day 71 (Jul 4).
|-
| 7 || Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven) || 6.04 days || 8,700 minutes
|-
| 6 || Sep 7 || One pico-universe-lifetime || 5.04 days || See Day 51 (Jul 24)
|-
| 5 || Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks || 4.63 days || The chorus lasts about 8 seconds per 'person'
|-
| 4 || Sep 9 || One centiyear || 3.65 days || 365.24 days/100
|-
| 3 || Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times || 2.79 days || Based on a length of 4 minutes, 1 second
|-
| 2 || Sep 11 || ''Speed'' (1994) played at one frame per second || 1.9 days || {{w|Speed_(1994_film)}} has runtime of 116 minutes = 6,960 seconds = 167,040 film frames at standard frame rate of 24 frames/second
|-
| 1 || Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1) || 0.76 days || Each iteration contains ''N'' verses. ''N + N-1 + N-2 ... + 1'' equals ''N * (N+1) / 2'', so 99 recursions = 4950 verses. Using the same 13-second (72 bpm) rate as Jun 29, this is close to 18 hours. Probably refers to Donald Knuth's article {{w|The Complexity of Songs}}.
|-
| 0 || Sep 13 || ''What If? 2'' release day || N/A ||
|}

The title text refers to the recursive time period on Sep 12. If you don't stop when you reach N=0 bottles, the repetition never ends, so that time interval becomes infinite. He likens it to {{w|The Song That Never Ends}}, another repetitive children's song, which is specifically intended to go on forever. The difference is that the Beer song has a natural stopping point at 0, while ''The Song That Never Ends'' is completely repetitive.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

Large heading: Countdown to ''What if? 2''

Subheading: (Preorder at [https://xkcd.com/whatif2 xkcd.com/whatif2] to get it at the end of the countdown)

Remainder of comic is a calendar with the date in one corner of each day's box.

{| class="wikitable"
|-
! Date !! Description
|-
| Jun 22 || πe millidecades
|-
| Jun 23 || 7 megaseconds
|-
| Jun 24 || e lunar months
|-
| Jun 25 || 60 rotations of Foucault's pendulum in Paris
|-
| Jun 26 || 8 milligenerations
|-
| Jun 27 || 777,777 dog minutes
|-
| Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads)
|-
| Jun 29 || 5,000 repeats of ''99 Bottles of Beer''
|-
| Jun 30 || 5 baker's fortnights (15 days)
|-
| Jul 1 || √2 dog years
|-
| Jul 2 || π millivics (1/1000th of Queen Victoria's reign)
|-
| Jul 3 || 42 drives from NYC to LA (Google Maps estimate)
|-
| Jul 4 || 1,000 viewings of ''Groundhog Day''
|-
| Jul 5 || 100,000 minutes
|-
| Jul 6 || 1/10th of Martian year
|-
| Jul 7 || 1,234,567 sound-miles
|-
| Jul 8 || 2πe seconds
|-
| Jul 9 || 216 beats (Swatch Internet Time)
|-
| Jul 10 || 1,000 ISS orbits
|-
| Jul 11 || Five hundred twenty five thousand (base seven) minutes (text preceded by several drawn musical notes)
|-
| Jul 12 || 1050 Planck times
|-
| Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)
|-
| Jul 14 || Four score and seven kilominutes
|-
| Jul 15 || 2 lunar months
|-
| Jul 16 || Half a day on Venus
|-
| Jul 17 || 5 megaseconds
|-
| Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature)
|-
| Jul 19 || 1,000 viewings of ''Run Lola Run''
|-
| Jul 20 || One million sound-miles
|-
| Jul 21 || 30 Ionian months
|-
| Jul 22 || One dog year
|-
| Jul 23 || 60 viewings of ''Star Wars Episodes I-IX''
|-
| Jul 24 || 1/100,000,000,000th of the universe's age
|-
| Jul 25 || 5 milli-generations
|-
| Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven''
|-
| Jul 27 || φeπ minutes
|-
| Jul 28 || 4 megaseconds
|-
| Jul 29 || 216 minutes
|-
| Jul 30 || eee seconds
|-
| Jul 31 || π fortnights
|-
| Aug 1 || one devil's spacewalk (666 orbits of the ISS)
|-
| Aug 2 || 1 kilowatt-hour per watt
|-
| Aug 3 || eπ Ionian months
|-
| Aug 4 || 30 rotations of Foucault's pendulum in Paris
|-
| Aug 5 || e fortnights
|-
| Aug 6 || πe baker's days (25 hours)
|-
| Aug 7 || one deciyear
|-
| Aug 8 || 7! milliweeks
|-
| Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music
|-
| Aug 10 || 1000 basketball games (game time)
|-
| Aug 11 || 777 hours
|-
| Aug 12 || one millilincoln (1/1000 of fourscore and seven years)
|-
| Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads)
|-
| Aug 14 || All of ''Star Trek'', consecutively
|-
| Aug 15 || 777,777 nanocenturies
|-
| Aug 16 || one sidereal lunar month
|-
| Aug 17 || 6 dog months
|-
| Aug 18 || ππ kilominutes
|-
| Aug 19 || 7 games of ''7! minutes in Heaven''
|-
| Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy
|-
| Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times
|-
| Aug 22 || ''It's a Small World'' sung at 1/10,000th speed
|-
| Aug 23 || 500 hours
|-
| Aug 24 || √2 fortnights
|-
| Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles
|-
| Aug 26 || 100,000 breaths
|-
| Aug 27 || √2 megaseconds
|-
| Aug 28 || πππ πcoseconds
|-
| Aug 29 || One baker's fortnight (15 days)
|-
| Aug 30 || One baker's dozen (13) baker's days (25 hours)
|-
| Aug 31 || 300 hours
|-
| Sep 1 || One million seconds
|-
| Sep 2 || One nonstop bike ride from NYC to LA
|-
| Sep 3 || 1⁄1,000th of a generation
|-
| Sep 4 || 777,777 seconds
|-
| Sep 5 || 100 viewings of ''Groundhog Day''
|-
| Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven)
|-
| Sep 7 || One pico-universe-lifetime
|-
| Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks
|-
| Sep 9 || One centiyear
|-
| Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times
|-
| Sep 11 || ''Speed'' (1994) played at one frame per second
|-
| Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1)
|-
| Sep 13 || ''What If? 2'' release day
|}
{{comic discussion}}
[[Category:Book promotion]]
[[Category:Comics featuring real people]]
[[Category:Songs]]
[[Category:Animals]]

2636: What If? 2 Countdown

2022-06-24T19:40:17Z

162.158.166.183: /* Explanation */ round to two sig digits for days

{{comic
| number = 2636
| date = June 22, 2022
| title = What If? 2 Countdown
| image = what_if_2_countdown.png
| titletext = If you don't end the 99 Bottles of Beer recursion at N=0 it just becomes The Other Song That Never Ends.
}}

==Explanation==
{{incomplete|Created by FOUR SCORE AND 7 BOTTLES OF BEER ON THE WALL - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
This comic takes the idea of {{w|Advent calendar}}s, and takes it to the extreme. It uses rather absurd and/or obscure ways to measure the amount of time until [[Randall]]'s new book ''What if? 2'' is released, with esoteric units or esoteric numbers. And often both.

Some concepts that appear several times throughout the calendar are:

* '''{{w|SI prefixes}}''', which can be applied to the beginning of a unit's name to multiply or divide the unit by powers of 10 or 1,000. This is standard for units like meters and grams, but is rarely applied to measurements of time other than when a unit of less than one second is needed, most commonly in various fields of science and engineering such as physics and electronics.
* The '''{{w|Gettysburg Address}}''', a famous speech delivered by U.S. president Abraham Lincoln in 1863, where he began by referring to the signing of the Declaration of Independence taking place "four score and seven years ago". A score is a dated term for the number 20, so "four score and seven" is equivalent to 87.
* A '''dog year''' is traditionally considered to be one-seventh the length of a normal human year, since a dog's overall lifespan is roughly one-seventh of a typical human's. The comic applies this to other units of time, such as minutes and months, each of which is also one-seventh the length of the standard unit. The number 7 (traditionally a "lucky number") is also used in many of the numbers quoted in the calendar.
* Other comparative durations of time that are not normally or usefully applied to day-length multiples. At the top end, there is the age of the universe, at the other there is {{w|Planck_units#Planck_time|Planck-time}} – with entire durations of periods of human history and the time needed to watch popular TV/film franchises in-between – most of which require a non-trivial multiplier or divisor to bring them to the necessary scale required.
* A '''{{w|baker's dozen}}''' is 13, or one more than a normal dozen. Here, the "baker's" prefix can be applied to any unit by adding an extra one of its constituent parts, like an extra hour added to a day.
* '''{{w|Irrational numbers}}''' like {{w|pi}} (3.14159...), {{w|Euler's number}} or ''e'' (2.71828...), the {{w|golden ratio}} (1.61803...), and the {{w|square root of 2}} (1.41421...). These are all interesting numbers because of their mathematical properties, but very impractical to use as arbitrary measurements of time because they have an endless series of non-repeating decimal digits.
* The teenage dating game '''{{w|Seven minutes in heaven}}'''.
* Rotation and revolution periods of various planets and moons in the Solar System.

{| class="wikitable"
|-
! Days left !! Date !! Duration specified !! Duration in days !! Explanation
|-
| 83 || Jun 22 || πe millidecades || 82.03 days || π ≈ 3.14159, e ≈ 2.718, so πe is about 22.459. A millidecade is 1/1000 decade, or 1/100 year, or 3.652425 days. Multiplying these results in 82.03 days. This is a play on {{w|Euler's identity}}, eiπ=-1, but raising pi to the power of e instead.
|-
| 82 || Jun 23 || 7 megaseconds || 81.02 days || 7,000,000 seconds
|-
| 81 || Jun 24 || e lunar months || 80.27 days || A lunar month ≈ 29.53059 days, e ≈ 2.718
|-
| 80 || Jun 25 || 60 rotations of Foucault's pendulum in Paris || 79.67 days || '''{{w|Paris}}''' is the capital city of '''{{w|France}}''' and it's located at a latitude of 48º 51' 23" N. '''{{w|Foucault's pendulum}}''' is a device conceived by French physicist '''{{w|Léon Foucault}}''', consisting of a pendulum that is free to rotate its plane of oscillation. When placed in a rotating '''{{w|Non-inertial reference frame}}''' such as the '''{{w|Earth}}''', that has an associated rotation period of 24 hours, the oscillation plane of Foucault's pendulum rotates at a rate determined by the Earth's period and the angle between the rotation axis of the frame of reference and the direction of its elongation in resting position, i.e. its latitude, with a period T = T🜨/sin(λ), being T🜨 Earth's period and λ the latitude of the pendulum. Historically, Léon Foucault performed this experiment in the city of Paris, most famously (although not for the first time, which happened at the '''{{w|Paris Observatory}}''') under the dome of the '''{{w|Panthéon}}''', to demonstrate Earth's rotation. At this latitude, Foucault's pendulum completes a full rotation every 31.8 hours.
|-
| 79 || Jun 26 || 8 milligenerations || 78.89 days || A generation is in general 22-33 years, with a reasonable mid-point of 27; and 8 x 0.001 (milli) x 365.2425 (accounting for leap years) x 27 ≈ 78.89 days
|-
| 78 || Jun 27 || 777,777 dog minutes || 77.16 days || A popular myth is that dogs age 7 times faster than humans, so 1 dog minute equals 1/7 human minutes.
|-
| 77 || Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads) || 77 days || 7!=7x6x5x4x3x2x1=5040 - The standard episode of ''Jeopardy'' is 22-26 minutes skipping ads - taking the lowest value you get 110880 minutes total, which is the exact value needed.
|-
| 76 || Jun 29 || 5,000 repeats of ''99 Bottles of Beer'' || 76.39 days || Each verse of {{w|99 Bottles of Beer}} is "''N'' bottles of beer on the wall, ''N'' bottles of beer. Take one down, pass it around, ''N-1'' bottles of beer on the wall." The entire song contains 99 verses. Randall apparently sings this rather slowly at around 72 bpm, taking about 13 seconds per verse.
|-
| 75 || Jun 30 || 5 baker's fortnights (15 days) || 75 days || A {{w|baker's dozen}} is a dozen (12) plus 1 extra item. Randall has generalized this to adding 1 to any unit. A fortnight is 2 weeks, so a baker's fortnight is 15 days. 5x15 is 75 days.
|-
| 74 || Jul 1 || √2 dog years || 73.79 days || See day 78 (Jun 27)
|-
| 73 || Jul 2 || π millivics (1/1000th of Queen Victoria's reign) || 72.97 days || {{w|Queen Victoria}} ruled between 20 June 1837 and 22 January 1901 (23,226 days).
|-
| 72 || Jul 3 || 42 drives from NYC to LA (Google Maps estimate) || 71.75 days || According to Google Maps, the drive from New York City to Los Angeles via I-80 W (2789 miles or 4489 km) takes 41 hours.
|-
| 71 || Jul 4 || 1,000 viewings of ''Groundhog Day''|| 70.14 days || Using {{w|Groundhog Day (film)|Groundhog Day's}} 101-minute run time.
|-
| 70 || Jul 5 || 100,000 minutes || 69.44 days ||
|-
| 69 || Jul 6 || 1/10th of Martian year || 68.70 Earth days || Martian sidereal and tropical years both round to 687.0 Earth days
|-
| 68 || Jul 7 || 1,234,567 sound-miles || 67.63 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 67.6349058 days.
|-
| 67 || Jul 8 || 2πe seconds || 66.74 days || 2^(π^e) = 5,766,073 seconds
|-
| 66 || Jul 9 || 216 beats (Swatch Internet Time) || 65.54 days || {{w|.beat}} is equal to 1/1000 day.
|-
| 65 || Jul 10 || 1,000 ISS orbits || 64.58 days || Each orbit of the ISS takes 90-93 minutes. Here a value of 93 minutes is used.
|-
| 64 || Jul 11 || Five hundred twenty five thousand (base seven) minutes|| 62.88 days || This refers to {{w|radix}}-7 arithmetic: 525,0007 minutes = 90,55210 minutes. Also references the opening and recurring line "Five hundred twenty five thousand six hundred minutes" from {{w|Seasons of Love}}, a song from the musical {{w|Rent (musical)|''Rent''}}, which is also referenced in [[1047: Approximations]]. "base seven" has the same rhythm as "six hundred".
|-
| 63 || Jul 12 || 1050 Planck times || 62.38 days || 10^50 x 5.39 x 10^-44 seconds
|-
| 62 || Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)|| 62.50 days || {{w|The Office (British TV series)|''The Office''}} was originally a {{w|BBC}} television show which had no commercial breaks, but Randall is obviously more familiar with the {{w|The_Office_(American_TV_series)|US version}}. This US "half-hour" comedy format contains 22.5 minutes of content (including the title sequence) and 7.5 minutes of ads. 
|-
| 61 || Jul 14 || Four score and seven kilominutes || 60.42 days || 87 x 1000 minutes
|-
| 60 || Jul 15 || 2 lunar months || 59.06 days || There are a number of different ways to define the {{w|lunar month}}. The most common is the synodic month, because it relates to the phases of the moon, and it's approximately 29.53 days.
|-
| 59 || Jul 16 || Half a day on Venus || 58.375 days || A Venus synodic day is 116 days 18 hours.
|-
| 58 || Jul 17 || 5 megaseconds || 57.8704 days || 5,000,000 seconds
|-
| 57 || Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature) || 4681~4763 years × 10-6 || Randall is stating that "literature" was invented approximately 2700 BCE. This is consistent with the earliest surviving coherent Sumerian texts, but the earliest proto-writing likely developed at least 500 years earlier according to {{w|History of writing}}.
|-
| 56 || Jul 19 || 1,000 viewings of ''Run Lola Run'' || 55.556 days || Using {{w|Run Lola Run|the movie's}} run time of 80 minutes.
|-
| 55 || Jul 20 || One million sound-miles || 54.78 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 54.7843137 days.
|-
| 54 || Jul 21 || 30 Ionian months || 53.07 days || Orbital period of Io around Jupiter is approximately 1.77 days.
|-
| 53 || Jul 22 || One dog year || 52.18 days || See day 78 (Jun 27)
|-
| 52 || Jul 23 || 60 viewings of ''Star Wars Episodes I-IX'' || 51.75 days || According to [https://dorksideoftheforce.com/2021/05/04/how-long-to-watch-every-star-wars-movie/ Fansided] the combined running times are 20 hours 42 minutes.
|-
| 51 || Jul 24 || 1/100,000,000,000th of the universe's age || 50.40 days || The universe is estimated to be about 13.8 billion years old.
|-
| 50 || Jul 25 || 5 milli-generations || 49.3 days || See day 79 (Jun 26)
|-
| 49 || Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven'' || 48.61 days || {{w|Seven minutes in heaven}} is an Anglo-culture teenager game, occuring in several movies. 10,000 minutes in Heaven is almost a week of making out (or doing whatever in a broom closet), so this game is unlikely.
|-
| 48 || Jul 27 || φeπ minutes || 47.62 days || 68,567.57 minutes
|-
| 47 || Jul 28 || 4 megaseconds || 46.30 days || 4,000,000 seconds
|-
| 46 || Jul 29 || 216 minutes || 45.51 days || 65,536 minutes
|-
| 45 || Jul 30 || eee seconds || 44.15 days || 3,814,279.10 seconds
|-
| 44 || Jul 31 || π fortnights|| 43.98 days || 3.14159 x 14 days
|-
| 43 || Aug 1 || One devil's spacewalk (666 orbits of the ISS) || 43.01 days || See day 65 (Jul 10). 666 is the {{w|number of the beast}}.
|-
| 42 || Aug 2 || 1 kilowatt-hour per watt || 41.66 days || 1000 hours
|-
| 41 || Aug 3 || eπ Ionian months || 40.94 days || Orbital period of Io around Jupiter is 1.769137786 days
|-
| 40 || Aug 4 || 30 rotations of Foucault's pendulum in Paris || 39.84 days || Refer to Day 80 (Jun 25)
|-
| 39 || Aug 5 || e fortnights || 38.06 days ||2.71828 x 14 days
|-
| 38 || Aug 6 || πe baker's days (25 hours) || 37.98 days || See day 75 (Jun 30)
|-
| 37 || Aug 7 || One deciyear || 36.52 days || One tenth of one year
|-
| 36 || Aug 8 || 7! milliweeks || 35.28 days || 5040 × 0.001 weeks
|-
| 35 || Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music || 34.72 days || ''Think'' is the music played while the contestants try to answer the Final Jeopardy question; it is 30 seconds long.
|-
| 34 || Aug 10 || 1000 basketball games (game time) || 33.33 days || Uses the NBA game time of four 12-minute quarters, or 48 minutes
|-
| 33 || Aug 11 || 777 hours || 32.38 days ||
|-
| 32 || Aug 12 || One millilincoln (1/1000 of fourscore and seven years) || 31.78 days || {{w|Abraham Lincoln}}'s {{w|Gettysburg Address}} begins with the famous phrase "Four score and seven years ago". 1 score = twenty. 
|-
| 31 || Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads) || 31.25 days || Uses a television 'hour' containing 45 minutes of content and 15 minutes of ads
|-
| 30 || Aug 14 || All of ''Star Trek'', consecutively || ||
|-
| 29 || Aug 15 || 777,777 nanocenturies || 28.41 days || 777,777 × 10-9 × 100 years
|-
| 28 || Aug 16 || One sidereal lunar month || 27.3 days || The time it takes moon to return to the same position relative to the fixed stars
|-
| 27 || Aug 17 || 6 dog months || 26.1 days || See day 78 (Jun 27)
|-
| 26 || Aug 18 || ππ kilominutes || 25.32 days || 36,462.16 minutes
|-
| 25 || Aug 19 || 7 games of 7! minutes in Heaven || 24.5 days || 7 x 5040 (7 {{w|Factorial}}) minutes. See also day 49 (Jul 26).
|-
| 24 || Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy || 23.82 days || ''The Fellowship of the Ring'' extended version is 208 minutes, ''The Two Towers'' is 226 minutes, and ''The Return of the King'' is 252 minutes for its e.v., according to [https://fictionhorizon.com/how-long-are-all-the-lord-of-the-rings-and-the-hobbit-movies-combined/ FictionHorizon.com]
|-
| 23 || Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times || 22.21 days || See day 72 (Jul 3). This is for 6 round-trips and 1 one-way trip.
|-
| 22 || Aug 22 || ''It's a Small World'' sung at 1/10,000th speed || 21.18 days || {{w|It's a Small World}} is a song that was composed for the attraction of the same name at various {{w|Disney}} theme parks, and plays continuously at them in various languages.
|-
| 21 || Aug 23 || 500 hours || 20.83 days ||
|-
| 20 || Aug 24 || √2 fortnights || 19.80 days || 1.4142 × 14 days
|-
| 19 || Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles || 18.94 days || {{w|Vanessa Carlton}} is an American singer, and {{w|A Thousand Miles}} is her most successful song. Randall estimates her walking speed at about 2.2 miles/hour.
|-
| 18 || Aug 26 || 100,000 breaths || 15 seconds per breath for 17 days || Normal respiratory rate for adults is typically 12-20 breaths per minute, or abou 3-4 seconds each. Randall may be a practitioner of "slow breathing".
|-
| 17 || Aug 27 || √2 megaseconds || 16.37 days || 1.4142 × 1,000,000 seconds
|-
| 16 || Aug 28 || πππ πcoseconds || 15.51 days || 1.3402 × 1018 picoseconds (i.e., 10-12 seconds), making a joke how the mathematical "pi" is written with the character "π"
|-
| 15 || Aug 29 || One baker's fortnight (15 days) || 15 days || See day 75 (Jun 30)
|-
| 14 || Aug 30 || One baker's dozen (13) baker's days (25 hours) || 13.54 days || 325 hours; see day 75 (Jun 30)
|-
| 13 || Aug 31 || 300 hours || 12.5 days ||
|-
| 12 || Sep 1 || One million seconds || 11.57 days ||
|-
| 11 || Sep 2 || One nonstop bike ride from NYC to LA || 10.54 days || Google maps estimates the trip at 253 hours
|-
| 10 || Sep 3 || 1⁄1,000th of a generation || 9.86 days || See day 79 (Jun 26)
|-
| 9 || Sep 4 || 777,777 seconds || 9.002 days ||
|-
| 8 || Sep 5 || 100 viewings of ''Groundhog Day'' || 7.01 days || See Day 71 (Jul 4).
|-
| 7 || Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven) || 6.04 days || 8,700 minutes
|-
| 6 || Sep 7 || One pico-universe-lifetime || 5.04 days || See Day 51 (Jul 24)
|-
| 5 || Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks || 4.63 days || The chorus lasts about 8 seconds per 'person'
|-
| 4 || Sep 9 || One centiyear || 3.65 days || 365.24 days/100
|-
| 3 || Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times || 2.79 days || Based on a length of 4 minutes, 1 second
|-
| 2 || Sep 11 || ''Speed'' (1994) played at one frame per second || 1.9 days || {{w|Speed_(1994_film)}} has runtime of 116 minutes = 6,960 seconds = 167,040 film frames at standard frame rate of 24 frames/second
|-
| 1 || Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1) || 0.76 days || Each iteration contains ''N'' verses. ''N + N-1 + N-2 ... + 1'' equals ''N * (N+1) / 2'', so 99 recursions = 4950 verses. Using the same 13-second (72 bpm) rate as Jun 29, this is close to 18 hours. Probably refers to Donald Knuth's article {{w|The Complexity of Songs}}.
|-
| 0 || Sep 13 || ''What If? 2'' release day || N/A ||
|}

The title text refers to the recursive time period on Sep 12. If you don't stop when you reach N=0 bottles, the repetition never ends, so that time interval becomes infinite. He likens it to {{w|The Song That Never Ends}}, another repetitive children's song, which is specifically intended to go on forever. The difference is that the Beer song has a natural stopping point at 0, while ''The Song That Never Ends'' is completely repetitive.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

Large heading: Countdown to ''What if? 2''

Subheading: (Preorder at [https://xkcd.com/whatif2 xkcd.com/whatif2] to get it at the end of the countdown)

Remainder of comic is a calendar with the date in one corner of each day's box.

{| class="wikitable"
|-
! Date !! Description
|-
| Jun 22 || πe millidecades
|-
| Jun 23 || 7 megaseconds
|-
| Jun 24 || e lunar months
|-
| Jun 25 || 60 rotations of Foucault's pendulum in Paris
|-
| Jun 26 || 8 milligenerations
|-
| Jun 27 || 777,777 dog minutes
|-
| Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads)
|-
| Jun 29 || 5,000 repeats of ''99 Bottles of Beer''
|-
| Jun 30 || 5 baker's fortnights (15 days)
|-
| Jul 1 || √2 dog years
|-
| Jul 2 || π millivics (1/1000th of Queen Victoria's reign)
|-
| Jul 3 || 42 drives from NYC to LA (Google Maps estimate)
|-
| Jul 4 || 1,000 viewings of ''Groundhog Day''
|-
| Jul 5 || 100,000 minutes
|-
| Jul 6 || 1/10th of Martian year
|-
| Jul 7 || 1,234,567 sound-miles
|-
| Jul 8 || 2πe seconds
|-
| Jul 9 || 216 beats (Swatch Internet Time)
|-
| Jul 10 || 1,000 ISS orbits
|-
| Jul 11 || Five hundred twenty five thousand (base seven) minutes (text preceded by several drawn musical notes)
|-
| Jul 12 || 1050 Planck times
|-
| Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)
|-
| Jul 14 || Four score and seven kilominutes
|-
| Jul 15 || 2 lunar months
|-
| Jul 16 || Half a day on Venus
|-
| Jul 17 || 5 megaseconds
|-
| Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature)
|-
| Jul 19 || 1,000 viewings of ''Run Lola Run''
|-
| Jul 20 || One million sound-miles
|-
| Jul 21 || 30 Ionian months
|-
| Jul 22 || One dog year
|-
| Jul 23 || 60 viewings of ''Star Wars Episodes I-IX''
|-
| Jul 24 || 1/100,000,000,000th of the universe's age
|-
| Jul 25 || 5 milli-generations
|-
| Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven''
|-
| Jul 27 || φeπ minutes
|-
| Jul 28 || 4 megaseconds
|-
| Jul 29 || 216 minutes
|-
| Jul 30 || eee seconds
|-
| Jul 31 || π fortnights
|-
| Aug 1 || one devil's spacewalk (666 orbits of the ISS)
|-
| Aug 2 || 1 kilowatt-hour per watt
|-
| Aug 3 || eπ Ionian months
|-
| Aug 4 || 30 rotations of Foucault's pendulum in Paris
|-
| Aug 5 || e fortnights
|-
| Aug 6 || πe baker's days (25 hours)
|-
| Aug 7 || one deciyear
|-
| Aug 8 || 7! milliweeks
|-
| Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music
|-
| Aug 10 || 1000 basketball games (game time)
|-
| Aug 11 || 777 hours
|-
| Aug 12 || one millilincoln (1/1000 of fourscore and seven years)
|-
| Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads)
|-
| Aug 14 || All of ''Star Trek'', consecutively
|-
| Aug 15 || 777,777 nanocenturies
|-
| Aug 16 || one sidereal lunar month
|-
| Aug 17 || 6 dog months
|-
| Aug 18 || ππ kilominutes
|-
| Aug 19 || 7 games of ''7! minutes in Heaven''
|-
| Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy
|-
| Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times
|-
| Aug 22 || ''It's a Small World'' sung at 1/10,000th speed
|-
| Aug 23 || 500 hours
|-
| Aug 24 || √2 fortnights
|-
| Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles
|-
| Aug 26 || 100,000 breaths
|-
| Aug 27 || √2 megaseconds
|-
| Aug 28 || πππ πcoseconds
|-
| Aug 29 || One baker's fortnight (15 days)
|-
| Aug 30 || One baker's dozen (13) baker's days (25 hours)
|-
| Aug 31 || 300 hours
|-
| Sep 1 || One million seconds
|-
| Sep 2 || One nonstop bike ride from NYC to LA
|-
| Sep 3 || 1⁄1,000th of a generation
|-
| Sep 4 || 777,777 seconds
|-
| Sep 5 || 100 viewings of ''Groundhog Day''
|-
| Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven)
|-
| Sep 7 || One pico-universe-lifetime
|-
| Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks
|-
| Sep 9 || One centiyear
|-
| Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times
|-
| Sep 11 || ''Speed'' (1994) played at one frame per second
|-
| Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1)
|-
| Sep 13 || ''What If? 2'' release day
|}
{{comic discussion}}
[[Category:Book promotion]]
[[Category:Comics featuring real people]]
[[Category:Songs]]
[[Category:Animals]]

2636: What If? 2 Countdown

2022-06-24T19:39:38Z

162.158.166.183: /* Explanation */ shorten column width per data

{{comic
| number = 2636
| date = June 22, 2022
| title = What If? 2 Countdown
| image = what_if_2_countdown.png
| titletext = If you don't end the 99 Bottles of Beer recursion at N=0 it just becomes The Other Song That Never Ends.
}}

==Explanation==
{{incomplete|Created by FOUR SCORE AND 7 BOTTLES OF BEER ON THE WALL - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
This comic takes the idea of {{w|Advent calendar}}s, and takes it to the extreme. It uses rather absurd and/or obscure ways to measure the amount of time until [[Randall]]'s new book ''What if? 2'' is released, with esoteric units or esoteric numbers. And often both.

Some concepts that appear several times throughout the calendar are:

* '''{{w|SI prefixes}}''', which can be applied to the beginning of a unit's name to multiply or divide the unit by powers of 10 or 1,000. This is standard for units like meters and grams, but is rarely applied to measurements of time other than when a unit of less than one second is needed, most commonly in various fields of science and engineering such as physics and electronics.
* The '''{{w|Gettysburg Address}}''', a famous speech delivered by U.S. president Abraham Lincoln in 1863, where he began by referring to the signing of the Declaration of Independence taking place "four score and seven years ago". A score is a dated term for the number 20, so "four score and seven" is equivalent to 87.
* A '''dog year''' is traditionally considered to be one-seventh the length of a normal human year, since a dog's overall lifespan is roughly one-seventh of a typical human's. The comic applies this to other units of time, such as minutes and months, each of which is also one-seventh the length of the standard unit. The number 7 (traditionally a "lucky number") is also used in many of the numbers quoted in the calendar.
* Other comparative durations of time that are not normally or usefully applied to day-length multiples. At the top end, there is the age of the universe, at the other there is {{w|Planck_units#Planck_time|Planck-time}} – with entire durations of periods of human history and the time needed to watch popular TV/film franchises in-between – most of which require a non-trivial multiplier or divisor to bring them to the necessary scale required.
* A '''{{w|baker's dozen}}''' is 13, or one more than a normal dozen. Here, the "baker's" prefix can be applied to any unit by adding an extra one of its constituent parts, like an extra hour added to a day.
* '''{{w|Irrational numbers}}''' like {{w|pi}} (3.14159...), {{w|Euler's number}} or ''e'' (2.71828...), the {{w|golden ratio}} (1.61803...), and the {{w|square root of 2}} (1.41421...). These are all interesting numbers because of their mathematical properties, but very impractical to use as arbitrary measurements of time because they have an endless series of non-repeating decimal digits.
* The teenage dating game '''{{w|Seven minutes in heaven}}'''.
* Rotation and revolution periods of various planets and moons in the Solar System.

{| class="wikitable"
|-
! Days left !! Date !! Duration specified !! Duration in days !! Explanation
|-
| 83 || Jun 22 || πe millidecades || 82.03 days || π ≈ 3.14159, e ≈ 2.718, so πe is about 22.459. A millidecade is 1/1000 decade, or 1/100 year, or 3.652425 days. Multiplying these results in 82.03 days. This is a play on {{w|Euler's identity}}, eiπ=-1, but raising pi to the power of e instead.
|-
| 82 || Jun 23 || 7 megaseconds || 81.02 days || 7,000,000 seconds
|-
| 81 || Jun 24 || e lunar months || 80.27 days || A lunar month ≈ 29.53059 days, e ≈ 2.718
|-
| 80 || Jun 25 || 60 rotations of Foucault's pendulum in Paris || 79.67 days || '''{{w|Paris}}''' is the capital city of '''{{w|France}}''' and it's located at a latitude of 48º 51' 23" N. '''{{w|Foucault's pendulum}}''' is a device conceived by French physicist '''{{w|Léon Foucault}}''', consisting of a pendulum that is free to rotate its plane of oscillation. When placed in a rotating '''{{w|Non-inertial reference frame}}''' such as the '''{{w|Earth}}''', that has an associated rotation period of 24 hours, the oscillation plane of Foucault's pendulum rotates at a rate determined by the Earth's period and the angle between the rotation axis of the frame of reference and the direction of its elongation in resting position, i.e. its latitude, with a period T = T🜨/sin(λ), being T🜨 Earth's period and λ the latitude of the pendulum. Historically, Léon Foucault performed this experiment in the city of Paris, most famously (although not for the first time, which happened at the '''{{w|Paris Observatory}}''') under the dome of the '''{{w|Panthéon}}''', to demonstrate Earth's rotation. At this latitude, Foucault's pendulum completes a full rotation every 31.8 hours.
|-
| 79 || Jun 26 || 8 milligenerations || 78.89 days || A generation is in general 22-33 years, with a reasonable mid-point of 27; and 8 x 0.001 (milli) x 365.2425 (accounting for leap years) x 27 ≈ 78.89 days
|-
| 78 || Jun 27 || 777,777 dog minutes || 77.16 days || A popular myth is that dogs age 7 times faster than humans, so 1 dog minute equals 1/7 human minutes.
|-
| 77 || Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads) || 77 days || 7!=7x6x5x4x3x2x1=5040 - The standard episode of ''Jeopardy'' is 22-26 minutes skipping ads - taking the lowest value you get 110880 minutes total, which is the exact value needed.
|-
| 76 || Jun 29 || 5,000 repeats of ''99 Bottles of Beer'' || 76.39 days || Each verse of {{w|99 Bottles of Beer}} is "''N'' bottles of beer on the wall, ''N'' bottles of beer. Take one down, pass it around, ''N-1'' bottles of beer on the wall." The entire song contains 99 verses. Randall apparently sings this rather slowly at around 72 bpm, taking about 13 seconds per verse.
|-
| 75 || Jun 30 || 5 baker's fortnights (15 days) || 75 days || A {{w|baker's dozen}} is a dozen (12) plus 1 extra item. Randall has generalized this to adding 1 to any unit. A fortnight is 2 weeks, so a baker's fortnight is 15 days. 5x15 is 75 days.
|-
| 74 || Jul 1 || √2 dog years || 73.79 days || See day 78 (Jun 27)
|-
| 73 || Jul 2 || π millivics (1/1000th of Queen Victoria's reign) || 72.97 days || {{w|Queen Victoria}} ruled between 20 June 1837 and 22 January 1901 (23,226 days).
|-
| 72 || Jul 3 || 42 drives from NYC to LA (Google Maps estimate) || 71.75 days || According to Google Maps, the drive from New York City to Los Angeles via I-80 W (2789 miles or 4489 km) takes 41 hours.
|-
| 71 || Jul 4 || 1,000 viewings of ''Groundhog Day''|| 70.14 days || Using {{w|Groundhog Day (film)|Groundhog Day's}} 101-minute run time.
|-
| 70 || Jul 5 || 100,000 minutes || 69.44 days ||
|-
| 69 || Jul 6 || 1/10th of Martian year || 68.70 Earth days || Martian sidereal and tropical years both round to 687.0 Earth days
|-
| 68 || Jul 7 || 1,234,567 sound-miles || 67.63 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 67.6349058 days.
|-
| 67 || Jul 8 || 2πe seconds || 66.74 days || 2^(π^e) = 5,766,073 seconds
|-
| 66 || Jul 9 || 216 beats (Swatch Internet Time) || 65.54 days || {{w|.beat}} is equal to 1/1000 day.
|-
| 65 || Jul 10 || 1,000 ISS orbits || 64.58 days || Each orbit of the ISS takes 90-93 minutes. Here a value of 93 minutes is used.
|-
| 64 || Jul 11 || Five hundred twenty five thousand (base seven) minutes|| 62.88 days || This refers to {{w|radix}}-7 arithmetic: 525,0007 minutes = 90,55210 minutes. Also references the opening and recurring line "Five hundred twenty five thousand six hundred minutes" from {{w|Seasons of Love}}, a song from the musical {{w|Rent (musical)|''Rent''}}, which is also referenced in [[1047: Approximations]]. "base seven" has the same rhythm as "six hundred".
|-
| 63 || Jul 12 || 1050 Planck times || 62.38 days || 10^50 x 5.39 x 10^-44 seconds
|-
| 62 || Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)|| 62.50 days || {{w|The Office (British TV series)|''The Office''}} was originally a {{w|BBC}} television show which had no commercial breaks, but Randall is obviously more familiar with the {{w|The_Office_(American_TV_series)|US version}}. This US "half-hour" comedy format contains 22.5 minutes of content (including the title sequence) and 7.5 minutes of ads. 
|-
| 61 || Jul 14 || Four score and seven kilominutes || 60.42 days || 87 x 1000 minutes
|-
| 60 || Jul 15 || 2 lunar months || 59.06 days || There are a number of different ways to define the {{w|lunar month}}. The most common is the synodic month, because it relates to the phases of the moon, and it's approximately 29.53 days.
|-
| 59 || Jul 16 || Half a day on Venus || 58.375 days || A Venus synodic day is 116 days 18 hours.
|-
| 58 || Jul 17 || 5 megaseconds || 57.8704 days || 5,000,000 seconds
|-
| 57 || Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature) || 4681~4763 years × 10-6 || Randall is stating that "literature" was invented approximately 2700 BCE. This is consistent with the earliest surviving coherent Sumerian texts, but the earliest proto-writing likely developed at least 500 years earlier according to {{w|History of writing}}.
|-
| 56 || Jul 19 || 1,000 viewings of ''Run Lola Run'' || 55.556 days || Using {{w|Run Lola Run|the movie's}} run time of 80 minutes.
|-
| 55 || Jul 20 || One million sound-miles || 54.78 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 54.7843137 days.
|-
| 54 || Jul 21 || 30 Ionian months || 53.0741 days || Orbital period of Io around Jupiter is approximately 1.77 days.
|-
| 53 || Jul 22 || One dog year || 52.18 days || See day 78 (Jun 27)
|-
| 52 || Jul 23 || 60 viewings of ''Star Wars Episodes I-IX'' || 51.75 days || According to [https://dorksideoftheforce.com/2021/05/04/how-long-to-watch-every-star-wars-movie/ Fansided] the combined running times are 20 hours 42 minutes.
|-
| 51 || Jul 24 || 1/100,000,000,000th of the universe's age || 50.40 days || The universe is estimated to be about 13.8 billion years old.
|-
| 50 || Jul 25 || 5 milli-generations || 49.3 days || See day 79 (Jun 26)
|-
| 49 || Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven'' || 48.61 days || {{w|Seven minutes in heaven}} is an Anglo-culture teenager game, occuring in several movies. 10,000 minutes in Heaven is almost a week of making out (or doing whatever in a broom closet), so this game is unlikely.
|-
| 48 || Jul 27 || φeπ minutes || 47.62 days || 68,567.57 minutes
|-
| 47 || Jul 28 || 4 megaseconds || 46.30 days || 4,000,000 seconds
|-
| 46 || Jul 29 || 216 minutes || 45.51 days || 65,536 minutes
|-
| 45 || Jul 30 || eee seconds || 44.15 days || 3,814,279.10 seconds
|-
| 44 || Jul 31 || π fortnights|| 43.98 days || 3.14159 x 14 days
|-
| 43 || Aug 1 || One devil's spacewalk (666 orbits of the ISS) || 43.01 days || See day 65 (Jul 10). 666 is the {{w|number of the beast}}.
|-
| 42 || Aug 2 || 1 kilowatt-hour per watt || 41.66 days || 1000 hours
|-
| 41 || Aug 3 || eπ Ionian months || 40.94 days || Orbital period of Io around Jupiter is 1.769137786 days
|-
| 40 || Aug 4 || 30 rotations of Foucault's pendulum in Paris || 39.84 days || Refer to Day 80 (Jun 25)
|-
| 39 || Aug 5 || e fortnights || 38.06 days ||2.71828 x 14 days
|-
| 38 || Aug 6 || πe baker's days (25 hours) || 37.98 days || See day 75 (Jun 30)
|-
| 37 || Aug 7 || One deciyear || 36.52 days || One tenth of one year
|-
| 36 || Aug 8 || 7! milliweeks || 35.28 days || 5040 × 0.001 weeks
|-
| 35 || Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music || 34.72 days || ''Think'' is the music played while the contestants try to answer the Final Jeopardy question; it is 30 seconds long.
|-
| 34 || Aug 10 || 1000 basketball games (game time) || 33.33 days || Uses the NBA game time of four 12-minute quarters, or 48 minutes
|-
| 33 || Aug 11 || 777 hours || 32.38 days ||
|-
| 32 || Aug 12 || One millilincoln (1/1000 of fourscore and seven years) || 31.78 days || {{w|Abraham Lincoln}}'s {{w|Gettysburg Address}} begins with the famous phrase "Four score and seven years ago". 1 score = twenty. 
|-
| 31 || Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads) || 31.25 days || Uses a television 'hour' containing 45 minutes of content and 15 minutes of ads
|-
| 30 || Aug 14 || All of ''Star Trek'', consecutively || ||
|-
| 29 || Aug 15 || 777,777 nanocenturies || 28.41 days || 777,777 × 10-9 × 100 years
|-
| 28 || Aug 16 || One sidereal lunar month || 27.3 days || The time it takes moon to return to the same position relative to the fixed stars
|-
| 27 || Aug 17 || 6 dog months || 26.1 days || See day 78 (Jun 27)
|-
| 26 || Aug 18 || ππ kilominutes || 25.32 days || 36,462.16 minutes
|-
| 25 || Aug 19 || 7 games of 7! minutes in Heaven || 24.5 days || 7 x 5040 (7 {{w|Factorial}}) minutes. See also day 49 (Jul 26).
|-
| 24 || Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy || 23.82 days || ''The Fellowship of the Ring'' extended version is 208 minutes, ''The Two Towers'' is 226 minutes, and ''The Return of the King'' is 252 minutes for its e.v., according to [https://fictionhorizon.com/how-long-are-all-the-lord-of-the-rings-and-the-hobbit-movies-combined/ FictionHorizon.com]
|-
| 23 || Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times || 22.21 days || See day 72 (Jul 3). This is for 6 round-trips and 1 one-way trip.
|-
| 22 || Aug 22 || ''It's a Small World'' sung at 1/10,000th speed || 21.18 days || {{w|It's a Small World}} is a song that was composed for the attraction of the same name at various {{w|Disney}} theme parks, and plays continuously at them in various languages.
|-
| 21 || Aug 23 || 500 hours || 20.83 days ||
|-
| 20 || Aug 24 || √2 fortnights || 19.80 days || 1.4142 × 14 days
|-
| 19 || Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles || 18.94 days || {{w|Vanessa Carlton}} is an American singer, and {{w|A Thousand Miles}} is her most successful song. Randall estimates her walking speed at about 2.2 miles/hour.
|-
| 18 || Aug 26 || 100,000 breaths || 15 seconds per breath for 17 days || Normal respiratory rate for adults is typically 12-20 breaths per minute, or abou 3-4 seconds each. Randall may be a practitioner of "slow breathing".
|-
| 17 || Aug 27 || √2 megaseconds || 16.37 days || 1.4142 × 1,000,000 seconds
|-
| 16 || Aug 28 || πππ πcoseconds || 15.51 days || 1.3402 × 1018 picoseconds (i.e., 10-12 seconds), making a joke how the mathematical "pi" is written with the character "π"
|-
| 15 || Aug 29 || One baker's fortnight (15 days) || 15 days || See day 75 (Jun 30)
|-
| 14 || Aug 30 || One baker's dozen (13) baker's days (25 hours) || 13.54 days || 325 hours; see day 75 (Jun 30)
|-
| 13 || Aug 31 || 300 hours || 12.5 days ||
|-
| 12 || Sep 1 || One million seconds || 11.57 days ||
|-
| 11 || Sep 2 || One nonstop bike ride from NYC to LA || 10.54 days || Google maps estimates the trip at 253 hours
|-
| 10 || Sep 3 || 1⁄1,000th of a generation || 9.86 days || See day 79 (Jun 26)
|-
| 9 || Sep 4 || 777,777 seconds || 9.002 days ||
|-
| 8 || Sep 5 || 100 viewings of ''Groundhog Day'' || 7.01 days || See Day 71 (Jul 4).
|-
| 7 || Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven) || 6.04 days || 8,700 minutes
|-
| 6 || Sep 7 || One pico-universe-lifetime || 5.04 days || See Day 51 (Jul 24)
|-
| 5 || Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks || 4.63 days || The chorus lasts about 8 seconds per 'person'
|-
| 4 || Sep 9 || One centiyear || 3.65 days || 365.24 days/100
|-
| 3 || Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times || 2.79 days || Based on a length of 4 minutes, 1 second
|-
| 2 || Sep 11 || ''Speed'' (1994) played at one frame per second || 1.9 days || {{w|Speed_(1994_film)}} has runtime of 116 minutes = 6,960 seconds = 167,040 film frames at standard frame rate of 24 frames/second
|-
| 1 || Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1) || 0.76 days || Each iteration contains ''N'' verses. ''N + N-1 + N-2 ... + 1'' equals ''N * (N+1) / 2'', so 99 recursions = 4950 verses. Using the same 13-second (72 bpm) rate as Jun 29, this is close to 18 hours. Probably refers to Donald Knuth's article {{w|The Complexity of Songs}}.
|-
| 0 || Sep 13 || ''What If? 2'' release day || N/A ||
|}

The title text refers to the recursive time period on Sep 12. If you don't stop when you reach N=0 bottles, the repetition never ends, so that time interval becomes infinite. He likens it to {{w|The Song That Never Ends}}, another repetitive children's song, which is specifically intended to go on forever. The difference is that the Beer song has a natural stopping point at 0, while ''The Song That Never Ends'' is completely repetitive.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

Large heading: Countdown to ''What if? 2''

Subheading: (Preorder at [https://xkcd.com/whatif2 xkcd.com/whatif2] to get it at the end of the countdown)

Remainder of comic is a calendar with the date in one corner of each day's box.

{| class="wikitable"
|-
! Date !! Description
|-
| Jun 22 || πe millidecades
|-
| Jun 23 || 7 megaseconds
|-
| Jun 24 || e lunar months
|-
| Jun 25 || 60 rotations of Foucault's pendulum in Paris
|-
| Jun 26 || 8 milligenerations
|-
| Jun 27 || 777,777 dog minutes
|-
| Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads)
|-
| Jun 29 || 5,000 repeats of ''99 Bottles of Beer''
|-
| Jun 30 || 5 baker's fortnights (15 days)
|-
| Jul 1 || √2 dog years
|-
| Jul 2 || π millivics (1/1000th of Queen Victoria's reign)
|-
| Jul 3 || 42 drives from NYC to LA (Google Maps estimate)
|-
| Jul 4 || 1,000 viewings of ''Groundhog Day''
|-
| Jul 5 || 100,000 minutes
|-
| Jul 6 || 1/10th of Martian year
|-
| Jul 7 || 1,234,567 sound-miles
|-
| Jul 8 || 2πe seconds
|-
| Jul 9 || 216 beats (Swatch Internet Time)
|-
| Jul 10 || 1,000 ISS orbits
|-
| Jul 11 || Five hundred twenty five thousand (base seven) minutes (text preceded by several drawn musical notes)
|-
| Jul 12 || 1050 Planck times
|-
| Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)
|-
| Jul 14 || Four score and seven kilominutes
|-
| Jul 15 || 2 lunar months
|-
| Jul 16 || Half a day on Venus
|-
| Jul 17 || 5 megaseconds
|-
| Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature)
|-
| Jul 19 || 1,000 viewings of ''Run Lola Run''
|-
| Jul 20 || One million sound-miles
|-
| Jul 21 || 30 Ionian months
|-
| Jul 22 || One dog year
|-
| Jul 23 || 60 viewings of ''Star Wars Episodes I-IX''
|-
| Jul 24 || 1/100,000,000,000th of the universe's age
|-
| Jul 25 || 5 milli-generations
|-
| Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven''
|-
| Jul 27 || φeπ minutes
|-
| Jul 28 || 4 megaseconds
|-
| Jul 29 || 216 minutes
|-
| Jul 30 || eee seconds
|-
| Jul 31 || π fortnights
|-
| Aug 1 || one devil's spacewalk (666 orbits of the ISS)
|-
| Aug 2 || 1 kilowatt-hour per watt
|-
| Aug 3 || eπ Ionian months
|-
| Aug 4 || 30 rotations of Foucault's pendulum in Paris
|-
| Aug 5 || e fortnights
|-
| Aug 6 || πe baker's days (25 hours)
|-
| Aug 7 || one deciyear
|-
| Aug 8 || 7! milliweeks
|-
| Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music
|-
| Aug 10 || 1000 basketball games (game time)
|-
| Aug 11 || 777 hours
|-
| Aug 12 || one millilincoln (1/1000 of fourscore and seven years)
|-
| Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads)
|-
| Aug 14 || All of ''Star Trek'', consecutively
|-
| Aug 15 || 777,777 nanocenturies
|-
| Aug 16 || one sidereal lunar month
|-
| Aug 17 || 6 dog months
|-
| Aug 18 || ππ kilominutes
|-
| Aug 19 || 7 games of ''7! minutes in Heaven''
|-
| Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy
|-
| Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times
|-
| Aug 22 || ''It's a Small World'' sung at 1/10,000th speed
|-
| Aug 23 || 500 hours
|-
| Aug 24 || √2 fortnights
|-
| Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles
|-
| Aug 26 || 100,000 breaths
|-
| Aug 27 || √2 megaseconds
|-
| Aug 28 || πππ πcoseconds
|-
| Aug 29 || One baker's fortnight (15 days)
|-
| Aug 30 || One baker's dozen (13) baker's days (25 hours)
|-
| Aug 31 || 300 hours
|-
| Sep 1 || One million seconds
|-
| Sep 2 || One nonstop bike ride from NYC to LA
|-
| Sep 3 || 1⁄1,000th of a generation
|-
| Sep 4 || 777,777 seconds
|-
| Sep 5 || 100 viewings of ''Groundhog Day''
|-
| Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven)
|-
| Sep 7 || One pico-universe-lifetime
|-
| Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks
|-
| Sep 9 || One centiyear
|-
| Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times
|-
| Sep 11 || ''Speed'' (1994) played at one frame per second
|-
| Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1)
|-
| Sep 13 || ''What If? 2'' release day
|}
{{comic discussion}}
[[Category:Book promotion]]
[[Category:Comics featuring real people]]
[[Category:Songs]]
[[Category:Animals]]

2636: What If? 2 Countdown

2022-06-24T19:38:41Z

162.158.166.183: /* Explanation */ better headings

{{comic
| number = 2636
| date = June 22, 2022
| title = What If? 2 Countdown
| image = what_if_2_countdown.png
| titletext = If you don't end the 99 Bottles of Beer recursion at N=0 it just becomes The Other Song That Never Ends.
}}

==Explanation==
{{incomplete|Created by FOUR SCORE AND 7 BOTTLES OF BEER ON THE WALL - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
This comic takes the idea of {{w|Advent calendar}}s, and takes it to the extreme. It uses rather absurd and/or obscure ways to measure the amount of time until [[Randall]]'s new book ''What if? 2'' is released, with esoteric units or esoteric numbers. And often both.

Some concepts that appear several times throughout the calendar are:

* '''{{w|SI prefixes}}''', which can be applied to the beginning of a unit's name to multiply or divide the unit by powers of 10 or 1,000. This is standard for units like meters and grams, but is rarely applied to measurements of time other than when a unit of less than one second is needed, most commonly in various fields of science and engineering such as physics and electronics.
* The '''{{w|Gettysburg Address}}''', a famous speech delivered by U.S. president Abraham Lincoln in 1863, where he began by referring to the signing of the Declaration of Independence taking place "four score and seven years ago". A score is a dated term for the number 20, so "four score and seven" is equivalent to 87.
* A '''dog year''' is traditionally considered to be one-seventh the length of a normal human year, since a dog's overall lifespan is roughly one-seventh of a typical human's. The comic applies this to other units of time, such as minutes and months, each of which is also one-seventh the length of the standard unit. The number 7 (traditionally a "lucky number") is also used in many of the numbers quoted in the calendar.
* Other comparative durations of time that are not normally or usefully applied to day-length multiples. At the top end, there is the age of the universe, at the other there is {{w|Planck_units#Planck_time|Planck-time}} – with entire durations of periods of human history and the time needed to watch popular TV/film franchises in-between – most of which require a non-trivial multiplier or divisor to bring them to the necessary scale required.
* A '''{{w|baker's dozen}}''' is 13, or one more than a normal dozen. Here, the "baker's" prefix can be applied to any unit by adding an extra one of its constituent parts, like an extra hour added to a day.
* '''{{w|Irrational numbers}}''' like {{w|pi}} (3.14159...), {{w|Euler's number}} or ''e'' (2.71828...), the {{w|golden ratio}} (1.61803...), and the {{w|square root of 2}} (1.41421...). These are all interesting numbers because of their mathematical properties, but very impractical to use as arbitrary measurements of time because they have an endless series of non-repeating decimal digits.
* The teenage dating game '''{{w|Seven minutes in heaven}}'''.
* Rotation and revolution periods of various planets and moons in the Solar System.

{| class="wikitable"
|-
! Days remaining !! Date !! Duration specified !! Duration in days !! Explanation
|-
| 83 || Jun 22 || πe millidecades || 82.03 days || π ≈ 3.14159, e ≈ 2.718, so πe is about 22.459. A millidecade is 1/1000 decade, or 1/100 year, or 3.652425 days. Multiplying these results in 82.03 days. This is a play on {{w|Euler's identity}}, eiπ=-1, but raising pi to the power of e instead.
|-
| 82 || Jun 23 || 7 megaseconds || 81.02 days || 7,000,000 seconds
|-
| 81 || Jun 24 || e lunar months || 80.27 days || A lunar month ≈ 29.53059 days, e ≈ 2.718
|-
| 80 || Jun 25 || 60 rotations of Foucault's pendulum in Paris || 79.67 days || '''{{w|Paris}}''' is the capital city of '''{{w|France}}''' and it's located at a latitude of 48º 51' 23" N. '''{{w|Foucault's pendulum}}''' is a device conceived by French physicist '''{{w|Léon Foucault}}''', consisting of a pendulum that is free to rotate its plane of oscillation. When placed in a rotating '''{{w|Non-inertial reference frame}}''' such as the '''{{w|Earth}}''', that has an associated rotation period of 24 hours, the oscillation plane of Foucault's pendulum rotates at a rate determined by the Earth's period and the angle between the rotation axis of the frame of reference and the direction of its elongation in resting position, i.e. its latitude, with a period T = T🜨/sin(λ), being T🜨 Earth's period and λ the latitude of the pendulum. Historically, Léon Foucault performed this experiment in the city of Paris, most famously (although not for the first time, which happened at the '''{{w|Paris Observatory}}''') under the dome of the '''{{w|Panthéon}}''', to demonstrate Earth's rotation. At this latitude, Foucault's pendulum completes a full rotation every 31.8 hours.
|-
| 79 || Jun 26 || 8 milligenerations || 78.89 days || A generation is in general 22-33 years, with a reasonable mid-point of 27; and 8 x 0.001 (milli) x 365.2425 (accounting for leap years) x 27 ≈ 78.89 days
|-
| 78 || Jun 27 || 777,777 dog minutes || 77.16 days || A popular myth is that dogs age 7 times faster than humans, so 1 dog minute equals 1/7 human minutes.
|-
| 77 || Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads) || 77 days || 7!=7x6x5x4x3x2x1=5040 - The standard episode of ''Jeopardy'' is 22-26 minutes skipping ads - taking the lowest value you get 110880 minutes total, which is the exact value needed.
|-
| 76 || Jun 29 || 5,000 repeats of ''99 Bottles of Beer'' || 76.39 days || Each verse of {{w|99 Bottles of Beer}} is "''N'' bottles of beer on the wall, ''N'' bottles of beer. Take one down, pass it around, ''N-1'' bottles of beer on the wall." The entire song contains 99 verses. Randall apparently sings this rather slowly at around 72 bpm, taking about 13 seconds per verse.
|-
| 75 || Jun 30 || 5 baker's fortnights (15 days) || 75 days || A {{w|baker's dozen}} is a dozen (12) plus 1 extra item. Randall has generalized this to adding 1 to any unit. A fortnight is 2 weeks, so a baker's fortnight is 15 days. 5x15 is 75 days.
|-
| 74 || Jul 1 || √2 dog years || 73.79 days || See day 78 (Jun 27)
|-
| 73 || Jul 2 || π millivics (1/1000th of Queen Victoria's reign) || 72.97 days || {{w|Queen Victoria}} ruled between 20 June 1837 and 22 January 1901 (23,226 days).
|-
| 72 || Jul 3 || 42 drives from NYC to LA (Google Maps estimate) || 71.75 days || According to Google Maps, the drive from New York City to Los Angeles via I-80 W (2789 miles or 4489 km) takes 41 hours.
|-
| 71 || Jul 4 || 1,000 viewings of ''Groundhog Day''|| 70.14 days || Using {{w|Groundhog Day (film)|Groundhog Day's}} 101-minute run time.
|-
| 70 || Jul 5 || 100,000 minutes || 69.44 days ||
|-
| 69 || Jul 6 || 1/10th of Martian year || 68.70 Earth days || Martian sidereal and tropical years both round to 687.0 Earth days
|-
| 68 || Jul 7 || 1,234,567 sound-miles || 67.63 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 67.6349058 days.
|-
| 67 || Jul 8 || 2πe seconds || 66.74 days || 2^(π^e) = 5,766,073 seconds
|-
| 66 || Jul 9 || 216 beats (Swatch Internet Time) || 65.54 days || {{w|.beat}} is equal to 1/1000 day.
|-
| 65 || Jul 10 || 1,000 ISS orbits || 64.58 days || Each orbit of the ISS takes 90-93 minutes. Here a value of 93 minutes is used.
|-
| 64 || Jul 11 || Five hundred twenty five thousand (base seven) minutes|| 62.88 days || This refers to {{w|radix}}-7 arithmetic: 525,0007 minutes = 90,55210 minutes. Also references the opening and recurring line "Five hundred twenty five thousand six hundred minutes" from {{w|Seasons of Love}}, a song from the musical {{w|Rent (musical)|''Rent''}}, which is also referenced in [[1047: Approximations]]. "base seven" has the same rhythm as "six hundred".
|-
| 63 || Jul 12 || 1050 Planck times || 62.38 days || 10^50 x 5.39 x 10^-44 seconds
|-
| 62 || Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)|| 62.50 days || {{w|The Office (British TV series)|''The Office''}} was originally a {{w|BBC}} television show which had no commercial breaks, but Randall is obviously more familiar with the {{w|The_Office_(American_TV_series)|US version}}. This US "half-hour" comedy format contains 22.5 minutes of content (including the title sequence) and 7.5 minutes of ads. 
|-
| 61 || Jul 14 || Four score and seven kilominutes || 60.42 days || 87 x 1000 minutes
|-
| 60 || Jul 15 || 2 lunar months || 59.06 days || There are a number of different ways to define the {{w|lunar month}}. The most common is the synodic month, because it relates to the phases of the moon, and it's approximately 29.53 days.
|-
| 59 || Jul 16 || Half a day on Venus || 58.375 days || A Venus synodic day is 116 days 18 hours.
|-
| 58 || Jul 17 || 5 megaseconds || 57.8704 days || 5,000,000 seconds
|-
| 57 || Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature) || 4681~4763 years × 10-6 || Randall is stating that "literature" was invented approximately 2700 BCE. This is consistent with the earliest surviving coherent Sumerian texts, but the earliest proto-writing likely developed at least 500 years earlier according to {{w|History of writing}}.
|-
| 56 || Jul 19 || 1,000 viewings of ''Run Lola Run'' || 55.556 days || Using {{w|Run Lola Run|the movie's}} run time of 80 minutes.
|-
| 55 || Jul 20 || One million sound-miles || 54.78 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 54.7843137 days.
|-
| 54 || Jul 21 || 30 Ionian months || 53.0741 days || Orbital period of Io around Jupiter is approximately 1.77 days.
|-
| 53 || Jul 22 || One dog year || 52.18 days || See day 78 (Jun 27)
|-
| 52 || Jul 23 || 60 viewings of ''Star Wars Episodes I-IX'' || 51.75 days || According to [https://dorksideoftheforce.com/2021/05/04/how-long-to-watch-every-star-wars-movie/ Fansided] the combined running times are 20 hours 42 minutes.
|-
| 51 || Jul 24 || 1/100,000,000,000th of the universe's age || 50.40 days || The universe is estimated to be about 13.8 billion years old.
|-
| 50 || Jul 25 || 5 milli-generations || 49.3 days || See day 79 (Jun 26)
|-
| 49 || Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven'' || 48.61 days || {{w|Seven minutes in heaven}} is an Anglo-culture teenager game, occuring in several movies. 10,000 minutes in Heaven is almost a week of making out (or doing whatever in a broom closet), so this game is unlikely.
|-
| 48 || Jul 27 || φeπ minutes || 47.62 days || 68,567.57 minutes
|-
| 47 || Jul 28 || 4 megaseconds || 46.30 days || 4,000,000 seconds
|-
| 46 || Jul 29 || 216 minutes || 45.51 days || 65,536 minutes
|-
| 45 || Jul 30 || eee seconds || 44.15 days || 3,814,279.10 seconds
|-
| 44 || Jul 31 || π fortnights|| 43.98 days || 3.14159 x 14 days
|-
| 43 || Aug 1 || One devil's spacewalk (666 orbits of the ISS) || 43.01 days || See day 65 (Jul 10). 666 is the {{w|number of the beast}}.
|-
| 42 || Aug 2 || 1 kilowatt-hour per watt || 41.66 days || 1000 hours
|-
| 41 || Aug 3 || eπ Ionian months || 40.94 days || Orbital period of Io around Jupiter is 1.769137786 days
|-
| 40 || Aug 4 || 30 rotations of Foucault's pendulum in Paris || 39.84 days || Refer to Day 80 (Jun 25)
|-
| 39 || Aug 5 || e fortnights || 38.06 days ||2.71828 x 14 days
|-
| 38 || Aug 6 || πe baker's days (25 hours) || 37.98 days || See day 75 (Jun 30)
|-
| 37 || Aug 7 || One deciyear || 36.52 days || One tenth of one year
|-
| 36 || Aug 8 || 7! milliweeks || 35.28 days || 5040 × 0.001 weeks
|-
| 35 || Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music || 34.72 days || ''Think'' is the music played while the contestants try to answer the Final Jeopardy question; it is 30 seconds long.
|-
| 34 || Aug 10 || 1000 basketball games (game time) || 33.33 days || Uses the NBA game time of four 12-minute quarters, or 48 minutes
|-
| 33 || Aug 11 || 777 hours || 32.38 days ||
|-
| 32 || Aug 12 || One millilincoln (1/1000 of fourscore and seven years) || 31.78 days || {{w|Abraham Lincoln}}'s {{w|Gettysburg Address}} begins with the famous phrase "Four score and seven years ago". 1 score = twenty. 
|-
| 31 || Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads) || 31.25 days || Uses a television 'hour' containing 45 minutes of content and 15 minutes of ads
|-
| 30 || Aug 14 || All of ''Star Trek'', consecutively || ||
|-
| 29 || Aug 15 || 777,777 nanocenturies || 28.41 days || 777,777 × 10-9 × 100 years
|-
| 28 || Aug 16 || One sidereal lunar month || 27.3 days || The time it takes moon to return to the same position relative to the fixed stars
|-
| 27 || Aug 17 || 6 dog months || 26.1 days || See day 78 (Jun 27)
|-
| 26 || Aug 18 || ππ kilominutes || 25.32 days || 36,462.16 minutes
|-
| 25 || Aug 19 || 7 games of 7! minutes in Heaven || 24.5 days || 7 x 5040 (7 {{w|Factorial}}) minutes. See also day 49 (Jul 26).
|-
| 24 || Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy || 23.82 days || ''The Fellowship of the Ring'' extended version is 208 minutes, ''The Two Towers'' is 226 minutes, and ''The Return of the King'' is 252 minutes for its e.v., according to [https://fictionhorizon.com/how-long-are-all-the-lord-of-the-rings-and-the-hobbit-movies-combined/ FictionHorizon.com]
|-
| 23 || Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times || 22.21 days || See day 72 (Jul 3). This is for 6 round-trips and 1 one-way trip.
|-
| 22 || Aug 22 || ''It's a Small World'' sung at 1/10,000th speed || 21.18 days || {{w|It's a Small World}} is a song that was composed for the attraction of the same name at various {{w|Disney}} theme parks, and plays continuously at them in various languages.
|-
| 21 || Aug 23 || 500 hours || 20.83 days ||
|-
| 20 || Aug 24 || √2 fortnights || 19.80 days || 1.4142 × 14 days
|-
| 19 || Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles || 18.94 days || {{w|Vanessa Carlton}} is an American singer, and {{w|A Thousand Miles}} is her most successful song. Randall estimates her walking speed at about 2.2 miles/hour.
|-
| 18 || Aug 26 || 100,000 breaths || 15 seconds per breath for 17 days || Normal respiratory rate for adults is typically 12-20 breaths per minute, or abou 3-4 seconds each. Randall may be a practitioner of "slow breathing".
|-
| 17 || Aug 27 || √2 megaseconds || 16.37 days || 1.4142 × 1,000,000 seconds
|-
| 16 || Aug 28 || πππ πcoseconds || 15.51 days || 1.3402 × 1018 picoseconds (i.e., 10-12 seconds), making a joke how the mathematical "pi" is written with the character "π"
|-
| 15 || Aug 29 || One baker's fortnight (15 days) || 15 days || See day 75 (Jun 30)
|-
| 14 || Aug 30 || One baker's dozen (13) baker's days (25 hours) || 13.54 days || 325 hours; see day 75 (Jun 30)
|-
| 13 || Aug 31 || 300 hours || 12.5 days ||
|-
| 12 || Sep 1 || One million seconds || 11.57 days ||
|-
| 11 || Sep 2 || One nonstop bike ride from NYC to LA || 10.54 days || Google maps estimates the trip at 253 hours
|-
| 10 || Sep 3 || 1⁄1,000th of a generation || 9.86 days || See day 79 (Jun 26)
|-
| 9 || Sep 4 || 777,777 seconds || 9.002 days ||
|-
| 8 || Sep 5 || 100 viewings of ''Groundhog Day'' || 7.01 days || See Day 71 (Jul 4).
|-
| 7 || Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven) || 6.04 days || 8,700 minutes
|-
| 6 || Sep 7 || One pico-universe-lifetime || 5.04 days || See Day 51 (Jul 24)
|-
| 5 || Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks || 4.63 days || The chorus lasts about 8 seconds per 'person'
|-
| 4 || Sep 9 || One centiyear || 3.65 days || 365.24 days/100
|-
| 3 || Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times || 2.79 days || Based on a length of 4 minutes, 1 second
|-
| 2 || Sep 11 || ''Speed'' (1994) played at one frame per second || 1.9 days || {{w|Speed_(1994_film)}} has runtime of 116 minutes = 6,960 seconds = 167,040 film frames at standard frame rate of 24 frames/second
|-
| 1 || Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1) || 0.76 days || Each iteration contains ''N'' verses. ''N + N-1 + N-2 ... + 1'' equals ''N * (N+1) / 2'', so 99 recursions = 4950 verses. Using the same 13-second (72 bpm) rate as Jun 29, this is close to 18 hours. Probably refers to Donald Knuth's article {{w|The Complexity of Songs}}.
|-
| 0 || Sep 13 || ''What If? 2'' release day || N/A ||
|}

The title text refers to the recursive time period on Sep 12. If you don't stop when you reach N=0 bottles, the repetition never ends, so that time interval becomes infinite. He likens it to {{w|The Song That Never Ends}}, another repetitive children's song, which is specifically intended to go on forever. The difference is that the Beer song has a natural stopping point at 0, while ''The Song That Never Ends'' is completely repetitive.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

Large heading: Countdown to ''What if? 2''

Subheading: (Preorder at [https://xkcd.com/whatif2 xkcd.com/whatif2] to get it at the end of the countdown)

Remainder of comic is a calendar with the date in one corner of each day's box.

{| class="wikitable"
|-
! Date !! Description
|-
| Jun 22 || πe millidecades
|-
| Jun 23 || 7 megaseconds
|-
| Jun 24 || e lunar months
|-
| Jun 25 || 60 rotations of Foucault's pendulum in Paris
|-
| Jun 26 || 8 milligenerations
|-
| Jun 27 || 777,777 dog minutes
|-
| Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads)
|-
| Jun 29 || 5,000 repeats of ''99 Bottles of Beer''
|-
| Jun 30 || 5 baker's fortnights (15 days)
|-
| Jul 1 || √2 dog years
|-
| Jul 2 || π millivics (1/1000th of Queen Victoria's reign)
|-
| Jul 3 || 42 drives from NYC to LA (Google Maps estimate)
|-
| Jul 4 || 1,000 viewings of ''Groundhog Day''
|-
| Jul 5 || 100,000 minutes
|-
| Jul 6 || 1/10th of Martian year
|-
| Jul 7 || 1,234,567 sound-miles
|-
| Jul 8 || 2πe seconds
|-
| Jul 9 || 216 beats (Swatch Internet Time)
|-
| Jul 10 || 1,000 ISS orbits
|-
| Jul 11 || Five hundred twenty five thousand (base seven) minutes (text preceded by several drawn musical notes)
|-
| Jul 12 || 1050 Planck times
|-
| Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)
|-
| Jul 14 || Four score and seven kilominutes
|-
| Jul 15 || 2 lunar months
|-
| Jul 16 || Half a day on Venus
|-
| Jul 17 || 5 megaseconds
|-
| Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature)
|-
| Jul 19 || 1,000 viewings of ''Run Lola Run''
|-
| Jul 20 || One million sound-miles
|-
| Jul 21 || 30 Ionian months
|-
| Jul 22 || One dog year
|-
| Jul 23 || 60 viewings of ''Star Wars Episodes I-IX''
|-
| Jul 24 || 1/100,000,000,000th of the universe's age
|-
| Jul 25 || 5 milli-generations
|-
| Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven''
|-
| Jul 27 || φeπ minutes
|-
| Jul 28 || 4 megaseconds
|-
| Jul 29 || 216 minutes
|-
| Jul 30 || eee seconds
|-
| Jul 31 || π fortnights
|-
| Aug 1 || one devil's spacewalk (666 orbits of the ISS)
|-
| Aug 2 || 1 kilowatt-hour per watt
|-
| Aug 3 || eπ Ionian months
|-
| Aug 4 || 30 rotations of Foucault's pendulum in Paris
|-
| Aug 5 || e fortnights
|-
| Aug 6 || πe baker's days (25 hours)
|-
| Aug 7 || one deciyear
|-
| Aug 8 || 7! milliweeks
|-
| Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music
|-
| Aug 10 || 1000 basketball games (game time)
|-
| Aug 11 || 777 hours
|-
| Aug 12 || one millilincoln (1/1000 of fourscore and seven years)
|-
| Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads)
|-
| Aug 14 || All of ''Star Trek'', consecutively
|-
| Aug 15 || 777,777 nanocenturies
|-
| Aug 16 || one sidereal lunar month
|-
| Aug 17 || 6 dog months
|-
| Aug 18 || ππ kilominutes
|-
| Aug 19 || 7 games of ''7! minutes in Heaven''
|-
| Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy
|-
| Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times
|-
| Aug 22 || ''It's a Small World'' sung at 1/10,000th speed
|-
| Aug 23 || 500 hours
|-
| Aug 24 || √2 fortnights
|-
| Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles
|-
| Aug 26 || 100,000 breaths
|-
| Aug 27 || √2 megaseconds
|-
| Aug 28 || πππ πcoseconds
|-
| Aug 29 || One baker's fortnight (15 days)
|-
| Aug 30 || One baker's dozen (13) baker's days (25 hours)
|-
| Aug 31 || 300 hours
|-
| Sep 1 || One million seconds
|-
| Sep 2 || One nonstop bike ride from NYC to LA
|-
| Sep 3 || 1⁄1,000th of a generation
|-
| Sep 4 || 777,777 seconds
|-
| Sep 5 || 100 viewings of ''Groundhog Day''
|-
| Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven)
|-
| Sep 7 || One pico-universe-lifetime
|-
| Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks
|-
| Sep 9 || One centiyear
|-
| Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times
|-
| Sep 11 || ''Speed'' (1994) played at one frame per second
|-
| Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1)
|-
| Sep 13 || ''What If? 2'' release day
|}
{{comic discussion}}
[[Category:Book promotion]]
[[Category:Comics featuring real people]]
[[Category:Songs]]
[[Category:Animals]]

2636: What If? 2 Countdown

2022-06-24T19:37:19Z

162.158.166.183: /* Explanation */ copyedit

{{comic
| number = 2636
| date = June 22, 2022
| title = What If? 2 Countdown
| image = what_if_2_countdown.png
| titletext = If you don't end the 99 Bottles of Beer recursion at N=0 it just becomes The Other Song That Never Ends.
}}

==Explanation==
{{incomplete|Created by FOUR SCORE AND 7 BOTTLES OF BEER ON THE WALL - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
This comic takes the idea of {{w|Advent calendar}}s, and takes it to the extreme. It uses rather absurd and/or obscure ways to measure the amount of time until [[Randall]]'s new book ''What if? 2'' is released, with esoteric units or esoteric numbers. And often both.

Some concepts that appear several times throughout the calendar are:

* '''{{w|SI prefixes}}''', which can be applied to the beginning of a unit's name to multiply or divide the unit by powers of 10 or 1,000. This is standard for units like meters and grams, but is rarely applied to measurements of time other than when a unit of less than one second is needed, most commonly in various fields of science and engineering such as physics and electronics.
* The '''{{w|Gettysburg Address}}''', a famous speech delivered by U.S. president Abraham Lincoln in 1863, where he began by referring to the signing of the Declaration of Independence taking place "four score and seven years ago". A score is a dated term for the number 20, so "four score and seven" is equivalent to 87.
* A '''dog year''' is traditionally considered to be one-seventh the length of a normal human year, since a dog's overall lifespan is roughly one-seventh of a typical human's. The comic applies this to other units of time, such as minutes and months, each of which is also one-seventh the length of the standard unit. The number 7 (traditionally a "lucky number") is also used in many of the numbers quoted in the calendar.
* Other comparative durations of time that are not normally or usefully applied to day-length multiples. At the top end, there is the age of the universe, at the other there is {{w|Planck_units#Planck_time|Planck-time}} – with entire durations of periods of human history and the time needed to watch popular TV/film franchises in-between – most of which require a non-trivial multiplier or divisor to bring them to the necessary scale required.
* A '''{{w|baker's dozen}}''' is 13, or one more than a normal dozen. Here, the "baker's" prefix can be applied to any unit by adding an extra one of its constituent parts, like an extra hour added to a day.
* '''{{w|Irrational numbers}}''' like {{w|pi}} (3.14159...), {{w|Euler's number}} or ''e'' (2.71828...), the {{w|golden ratio}} (1.61803...), and the {{w|square root of 2}} (1.41421...). These are all interesting numbers because of their mathematical properties, but very impractical to use as arbitrary measurements of time because they have an endless series of non-repeating decimal digits.
* The teenage dating game '''{{w|Seven minutes in heaven}}'''.
* Rotation and revolution periods of various planets and moons in the Solar System.

{| class="wikitable"
|-
! Days !! Date !! Units !! Value in days !! Explanation
|-
| 83 || Jun 22 || πe millidecades || 82.03 days || π ≈ 3.14159, e ≈ 2.718, so πe is about 22.459. A millidecade is 1/1000 decade, or 1/100 year, or 3.652425 days. Multiplying these results in 82.03 days. This is a play on {{w|Euler's identity}}, eiπ=-1, but raising pi to the power of e instead.
|-
| 82 || Jun 23 || 7 megaseconds || 81.02 days || 7,000,000 seconds
|-
| 81 || Jun 24 || e lunar months || 80.27 days || A lunar month ≈ 29.53059 days, e ≈ 2.718
|-
| 80 || Jun 25 || 60 rotations of Foucault's pendulum in Paris || 79.67 days || '''{{w|Paris}}''' is the capital city of '''{{w|France}}''' and it's located at a latitude of 48º 51' 23" N. '''{{w|Foucault's pendulum}}''' is a device conceived by French physicist '''{{w|Léon Foucault}}''', consisting of a pendulum that is free to rotate its plane of oscillation. When placed in a rotating '''{{w|Non-inertial reference frame}}''' such as the '''{{w|Earth}}''', that has an associated rotation period of 24 hours, the oscillation plane of Foucault's pendulum rotates at a rate determined by the Earth's period and the angle between the rotation axis of the frame of reference and the direction of its elongation in resting position, i.e. its latitude, with a period T = T🜨/sin(λ), being T🜨 Earth's period and λ the latitude of the pendulum. Historically, Léon Foucault performed this experiment in the city of Paris, most famously (although not for the first time, which happened at the '''{{w|Paris Observatory}}''') under the dome of the '''{{w|Panthéon}}''', to demonstrate Earth's rotation. At this latitude, Foucault's pendulum completes a full rotation every 31.8 hours.
|-
| 79 || Jun 26 || 8 milligenerations || 78.89 days || A generation is in general 22-33 years, with a reasonable mid-point of 27; and 8 x 0.001 (milli) x 365.2425 (accounting for leap years) x 27 ≈ 78.89 days
|-
| 78 || Jun 27 || 777,777 dog minutes || 77.16 days || A popular myth is that dogs age 7 times faster than humans, so 1 dog minute equals 1/7 human minutes.
|-
| 77 || Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads) || 77 days || 7!=7x6x5x4x3x2x1=5040 - The standard episode of ''Jeopardy'' is 22-26 minutes skipping ads - taking the lowest value you get 110880 minutes total, which is the exact value needed.
|-
| 76 || Jun 29 || 5,000 repeats of ''99 Bottles of Beer'' || 76.39 days || Each verse of {{w|99 Bottles of Beer}} is "''N'' bottles of beer on the wall, ''N'' bottles of beer. Take one down, pass it around, ''N-1'' bottles of beer on the wall." The entire song contains 99 verses. Randall apparently sings this rather slowly at around 72 bpm, taking about 13 seconds per verse.
|-
| 75 || Jun 30 || 5 baker's fortnights (15 days) || 75 days || A {{w|baker's dozen}} is a dozen (12) plus 1 extra item. Randall has generalized this to adding 1 to any unit. A fortnight is 2 weeks, so a baker's fortnight is 15 days. 5x15 is 75 days.
|-
| 74 || Jul 1 || √2 dog years || 73.79 days || See day 78 (Jun 27)
|-
| 73 || Jul 2 || π millivics (1/1000th of Queen Victoria's reign) || 72.97 days || {{w|Queen Victoria}} ruled between 20 June 1837 and 22 January 1901 (23,226 days).
|-
| 72 || Jul 3 || 42 drives from NYC to LA (Google Maps estimate) || 71.75 days || According to Google Maps, the drive from New York City to Los Angeles via I-80 W (2789 miles or 4489 km) takes 41 hours.
|-
| 71 || Jul 4 || 1,000 viewings of ''Groundhog Day''|| 70.14 days || Using {{w|Groundhog Day (film)|Groundhog Day's}} 101-minute run time.
|-
| 70 || Jul 5 || 100,000 minutes || 69.44 days ||
|-
| 69 || Jul 6 || 1/10th of Martian year || 68.70 Earth days || Martian sidereal and tropical years both round to 687.0 Earth days
|-
| 68 || Jul 7 || 1,234,567 sound-miles || 67.63 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 67.6349058 days.
|-
| 67 || Jul 8 || 2πe seconds || 66.74 days || 2^(π^e) = 5,766,073 seconds
|-
| 66 || Jul 9 || 216 beats (Swatch Internet Time) || 65.54 days || {{w|.beat}} is equal to 1/1000 day.
|-
| 65 || Jul 10 || 1,000 ISS orbits || 64.58 days || Each orbit of the ISS takes 90-93 minutes. Here a value of 93 minutes is used.
|-
| 64 || Jul 11 || Five hundred twenty five thousand (base seven) minutes|| 62.88 days || This refers to {{w|radix}}-7 arithmetic: 525,0007 minutes = 90,55210 minutes. Also references the opening and recurring line "Five hundred twenty five thousand six hundred minutes" from {{w|Seasons of Love}}, a song from the musical {{w|Rent (musical)|''Rent''}}, which is also referenced in [[1047: Approximations]]. "base seven" has the same rhythm as "six hundred".
|-
| 63 || Jul 12 || 1050 Planck times || 62.38 days || 10^50 x 5.39 x 10^-44 seconds
|-
| 62 || Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)|| 62.50 days || {{w|The Office (British TV series)|''The Office''}} was originally a {{w|BBC}} television show which had no commercial breaks, but Randall is obviously more familiar with the {{w|The_Office_(American_TV_series)|US version}}. This US "half-hour" comedy format contains 22.5 minutes of content (including the title sequence) and 7.5 minutes of ads. 
|-
| 61 || Jul 14 || Four score and seven kilominutes || 60.42 days || 87 x 1000 minutes
|-
| 60 || Jul 15 || 2 lunar months || 59.06 days || There are a number of different ways to define the {{w|lunar month}}. The most common is the synodic month, because it relates to the phases of the moon, and it's approximately 29.53 days.
|-
| 59 || Jul 16 || Half a day on Venus || 58.375 days || A Venus synodic day is 116 days 18 hours.
|-
| 58 || Jul 17 || 5 megaseconds || 57.8704 days || 5,000,000 seconds
|-
| 57 || Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature) || 4681~4763 years × 10-6 || Randall is stating that "literature" was invented approximately 2700 BCE. This is consistent with the earliest surviving coherent Sumerian texts, but the earliest proto-writing likely developed at least 500 years earlier according to {{w|History of writing}}.
|-
| 56 || Jul 19 || 1,000 viewings of ''Run Lola Run'' || 55.556 days || Using {{w|Run Lola Run|the movie's}} run time of 80 minutes.
|-
| 55 || Jul 20 || One million sound-miles || 54.78 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 54.7843137 days.
|-
| 54 || Jul 21 || 30 Ionian months || 53.0741 days || Orbital period of Io around Jupiter is approximately 1.77 days.
|-
| 53 || Jul 22 || One dog year || 52.18 days || See day 78 (Jun 27)
|-
| 52 || Jul 23 || 60 viewings of ''Star Wars Episodes I-IX'' || 51.75 days || According to [https://dorksideoftheforce.com/2021/05/04/how-long-to-watch-every-star-wars-movie/ Fansided] the combined running times are 20 hours 42 minutes.
|-
| 51 || Jul 24 || 1/100,000,000,000th of the universe's age || 50.40 days || The universe is estimated to be about 13.8 billion years old.
|-
| 50 || Jul 25 || 5 milli-generations || 49.3 days || See day 79 (Jun 26)
|-
| 49 || Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven'' || 48.61 days || {{w|Seven minutes in heaven}} is an Anglo-culture teenager game, occuring in several movies. 10,000 minutes in Heaven is almost a week of making out (or doing whatever in a broom closet), so this game is unlikely.
|-
| 48 || Jul 27 || φeπ minutes || 47.62 days || 68,567.57 minutes
|-
| 47 || Jul 28 || 4 megaseconds || 46.30 days || 4,000,000 seconds
|-
| 46 || Jul 29 || 216 minutes || 45.51 days || 65,536 minutes
|-
| 45 || Jul 30 || eee seconds || 44.15 days || 3,814,279.10 seconds
|-
| 44 || Jul 31 || π fortnights|| 43.98 days || 3.14159 x 14 days
|-
| 43 || Aug 1 || One devil's spacewalk (666 orbits of the ISS) || 43.01 days || See day 65 (Jul 10). 666 is the {{w|number of the beast}}.
|-
| 42 || Aug 2 || 1 kilowatt-hour per watt || 41.66 days || 1000 hours
|-
| 41 || Aug 3 || eπ Ionian months || 40.94 days || Orbital period of Io around Jupiter is 1.769137786 days
|-
| 40 || Aug 4 || 30 rotations of Foucault's pendulum in Paris || 39.84 days || Refer to Day 80 (Jun 25)
|-
| 39 || Aug 5 || e fortnights || 38.06 days ||2.71828 x 14 days
|-
| 38 || Aug 6 || πe baker's days (25 hours) || 37.98 days || See day 75 (Jun 30)
|-
| 37 || Aug 7 || One deciyear || 36.52 days || One tenth of one year
|-
| 36 || Aug 8 || 7! milliweeks || 35.28 days || 5040 × 0.001 weeks
|-
| 35 || Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music || 34.72 days || ''Think'' is the music played while the contestants try to answer the Final Jeopardy question; it is 30 seconds long.
|-
| 34 || Aug 10 || 1000 basketball games (game time) || 33.33 days || Uses the NBA game time of four 12-minute quarters, or 48 minutes
|-
| 33 || Aug 11 || 777 hours || 32.38 days ||
|-
| 32 || Aug 12 || One millilincoln (1/1000 of fourscore and seven years) || 31.78 days || {{w|Abraham Lincoln}}'s {{w|Gettysburg Address}} begins with the famous phrase "Four score and seven years ago". 1 score = twenty. 
|-
| 31 || Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads) || 31.25 days || Uses a television 'hour' containing 45 minutes of content and 15 minutes of ads
|-
| 30 || Aug 14 || All of ''Star Trek'', consecutively || ||
|-
| 29 || Aug 15 || 777,777 nanocenturies || 28.41 days || 777,777 × 10-9 × 100 years
|-
| 28 || Aug 16 || One sidereal lunar month || 27.3 days || The time it takes moon to return to the same position relative to the fixed stars
|-
| 27 || Aug 17 || 6 dog months || 26.1 days || See day 78 (Jun 27)
|-
| 26 || Aug 18 || ππ kilominutes || 25.32 days || 36,462.16 minutes
|-
| 25 || Aug 19 || 7 games of 7! minutes in Heaven || 24.5 days || 7 x 5040 (7 {{w|Factorial}}) minutes. See also day 49 (Jul 26).
|-
| 24 || Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy || 23.82 days || ''The Fellowship of the Ring'' extended version is 208 minutes, ''The Two Towers'' is 226 minutes, and ''The Return of the King'' is 252 minutes for its e.v., according to [https://fictionhorizon.com/how-long-are-all-the-lord-of-the-rings-and-the-hobbit-movies-combined/ FictionHorizon.com]
|-
| 23 || Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times || 22.21 days || See day 72 (Jul 3). This is for 6 round-trips and 1 one-way trip.
|-
| 22 || Aug 22 || ''It's a Small World'' sung at 1/10,000th speed || 21.18 days || {{w|It's a Small World}} is a song that was composed for the attraction of the same name at various {{w|Disney}} theme parks, and plays continuously at them in various languages.
|-
| 21 || Aug 23 || 500 hours || 20.83 days ||
|-
| 20 || Aug 24 || √2 fortnights || 19.80 days || 1.4142 × 14 days
|-
| 19 || Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles || 18.94 days || {{w|Vanessa Carlton}} is an American singer, and {{w|A Thousand Miles}} is her most successful song. Randall estimates her walking speed at about 2.2 miles/hour.
|-
| 18 || Aug 26 || 100,000 breaths || 15 seconds per breath for 17 days || Normal respiratory rate for adults is typically 12-20 breaths per minute, or abou 3-4 seconds each. Randall may be a practitioner of "slow breathing".
|-
| 17 || Aug 27 || √2 megaseconds || 16.37 days || 1.4142 × 1,000,000 seconds
|-
| 16 || Aug 28 || πππ πcoseconds || 15.51 days || 1.3402 × 1018 picoseconds (i.e., 10-12 seconds), making a joke how the mathematical "pi" is written with the character "π"
|-
| 15 || Aug 29 || One baker's fortnight (15 days) || 15 days || See day 75 (Jun 30)
|-
| 14 || Aug 30 || One baker's dozen (13) baker's days (25 hours) || 13.54 days || 325 hours; see day 75 (Jun 30)
|-
| 13 || Aug 31 || 300 hours || 12.5 days ||
|-
| 12 || Sep 1 || One million seconds || 11.57 days ||
|-
| 11 || Sep 2 || One nonstop bike ride from NYC to LA || 10.54 days || Google maps estimates the trip at 253 hours
|-
| 10 || Sep 3 || 1⁄1,000th of a generation || 9.86 days || See day 79 (Jun 26)
|-
| 9 || Sep 4 || 777,777 seconds || 9.002 days ||
|-
| 8 || Sep 5 || 100 viewings of ''Groundhog Day'' || 7.01 days || See Day 71 (Jul 4).
|-
| 7 || Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven) || 6.04 days || 8,700 minutes
|-
| 6 || Sep 7 || One pico-universe-lifetime || 5.04 days || See Day 51 (Jul 24)
|-
| 5 || Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks || 4.63 days || The chorus lasts about 8 seconds per 'person'
|-
| 4 || Sep 9 || One centiyear || 3.65 days || 365.24 days/100
|-
| 3 || Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times || 2.79 days || Based on a length of 4 minutes, 1 second
|-
| 2 || Sep 11 || ''Speed'' (1994) played at one frame per second || 1.9 days || {{w|Speed_(1994_film)}} has runtime of 116 minutes = 6,960 seconds = 167,040 film frames at standard frame rate of 24 frames/second
|-
| 1 || Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1) || 0.76 days || Each iteration contains ''N'' verses. ''N + N-1 + N-2 ... + 1'' equals ''N * (N+1) / 2'', so 99 recursions = 4950 verses. Using the same 13-second (72 bpm) rate as Jun 29, this is close to 18 hours. Probably refers to Donald Knuth's article {{w|The Complexity of Songs}}.
|-
| 0 || Sep 13 || ''What If? 2'' release day || N/A ||
|}

The title text refers to the recursive time period on Sep 12. If you don't stop when you reach N=0 bottles, the repetition never ends, so that time interval becomes infinite. He likens it to {{w|The Song That Never Ends}}, another repetitive children's song, which is specifically intended to go on forever. The difference is that the Beer song has a natural stopping point at 0, while ''The Song That Never Ends'' is completely repetitive.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

Large heading: Countdown to ''What if? 2''

Subheading: (Preorder at [https://xkcd.com/whatif2 xkcd.com/whatif2] to get it at the end of the countdown)

Remainder of comic is a calendar with the date in one corner of each day's box.

{| class="wikitable"
|-
! Date !! Description
|-
| Jun 22 || πe millidecades
|-
| Jun 23 || 7 megaseconds
|-
| Jun 24 || e lunar months
|-
| Jun 25 || 60 rotations of Foucault's pendulum in Paris
|-
| Jun 26 || 8 milligenerations
|-
| Jun 27 || 777,777 dog minutes
|-
| Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads)
|-
| Jun 29 || 5,000 repeats of ''99 Bottles of Beer''
|-
| Jun 30 || 5 baker's fortnights (15 days)
|-
| Jul 1 || √2 dog years
|-
| Jul 2 || π millivics (1/1000th of Queen Victoria's reign)
|-
| Jul 3 || 42 drives from NYC to LA (Google Maps estimate)
|-
| Jul 4 || 1,000 viewings of ''Groundhog Day''
|-
| Jul 5 || 100,000 minutes
|-
| Jul 6 || 1/10th of Martian year
|-
| Jul 7 || 1,234,567 sound-miles
|-
| Jul 8 || 2πe seconds
|-
| Jul 9 || 216 beats (Swatch Internet Time)
|-
| Jul 10 || 1,000 ISS orbits
|-
| Jul 11 || Five hundred twenty five thousand (base seven) minutes (text preceded by several drawn musical notes)
|-
| Jul 12 || 1050 Planck times
|-
| Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)
|-
| Jul 14 || Four score and seven kilominutes
|-
| Jul 15 || 2 lunar months
|-
| Jul 16 || Half a day on Venus
|-
| Jul 17 || 5 megaseconds
|-
| Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature)
|-
| Jul 19 || 1,000 viewings of ''Run Lola Run''
|-
| Jul 20 || One million sound-miles
|-
| Jul 21 || 30 Ionian months
|-
| Jul 22 || One dog year
|-
| Jul 23 || 60 viewings of ''Star Wars Episodes I-IX''
|-
| Jul 24 || 1/100,000,000,000th of the universe's age
|-
| Jul 25 || 5 milli-generations
|-
| Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven''
|-
| Jul 27 || φeπ minutes
|-
| Jul 28 || 4 megaseconds
|-
| Jul 29 || 216 minutes
|-
| Jul 30 || eee seconds
|-
| Jul 31 || π fortnights
|-
| Aug 1 || one devil's spacewalk (666 orbits of the ISS)
|-
| Aug 2 || 1 kilowatt-hour per watt
|-
| Aug 3 || eπ Ionian months
|-
| Aug 4 || 30 rotations of Foucault's pendulum in Paris
|-
| Aug 5 || e fortnights
|-
| Aug 6 || πe baker's days (25 hours)
|-
| Aug 7 || one deciyear
|-
| Aug 8 || 7! milliweeks
|-
| Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music
|-
| Aug 10 || 1000 basketball games (game time)
|-
| Aug 11 || 777 hours
|-
| Aug 12 || one millilincoln (1/1000 of fourscore and seven years)
|-
| Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads)
|-
| Aug 14 || All of ''Star Trek'', consecutively
|-
| Aug 15 || 777,777 nanocenturies
|-
| Aug 16 || one sidereal lunar month
|-
| Aug 17 || 6 dog months
|-
| Aug 18 || ππ kilominutes
|-
| Aug 19 || 7 games of ''7! minutes in Heaven''
|-
| Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy
|-
| Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times
|-
| Aug 22 || ''It's a Small World'' sung at 1/10,000th speed
|-
| Aug 23 || 500 hours
|-
| Aug 24 || √2 fortnights
|-
| Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles
|-
| Aug 26 || 100,000 breaths
|-
| Aug 27 || √2 megaseconds
|-
| Aug 28 || πππ πcoseconds
|-
| Aug 29 || One baker's fortnight (15 days)
|-
| Aug 30 || One baker's dozen (13) baker's days (25 hours)
|-
| Aug 31 || 300 hours
|-
| Sep 1 || One million seconds
|-
| Sep 2 || One nonstop bike ride from NYC to LA
|-
| Sep 3 || 1⁄1,000th of a generation
|-
| Sep 4 || 777,777 seconds
|-
| Sep 5 || 100 viewings of ''Groundhog Day''
|-
| Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven)
|-
| Sep 7 || One pico-universe-lifetime
|-
| Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks
|-
| Sep 9 || One centiyear
|-
| Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times
|-
| Sep 11 || ''Speed'' (1994) played at one frame per second
|-
| Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1)
|-
| Sep 13 || ''What If? 2'' release day
|}
{{comic discussion}}
[[Category:Book promotion]]
[[Category:Comics featuring real people]]
[[Category:Songs]]
[[Category:Animals]]

2636: What If? 2 Countdown

2022-06-24T19:35:51Z

162.158.166.183: /* Explanation */ round to two sig digits for days

{{comic
| number = 2636
| date = June 22, 2022
| title = What If? 2 Countdown
| image = what_if_2_countdown.png
| titletext = If you don't end the 99 Bottles of Beer recursion at N=0 it just becomes The Other Song That Never Ends.
}}

==Explanation==
{{incomplete|Created by FOUR SCORE AND 7 BOTTLES OF BEER ON THE WALL - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
This comic takes the idea of {{w|Advent calendar}}s, and takes it to the extreme. It uses rather absurd and/or obscure ways to measure the amount of time until [[Randall]]'s new book ''What if? 2'' is released, with esoteric units or esoteric numbers. And often both.

Some concepts that appear several times throughout the calendar are:

* '''{{w|SI prefixes}}''', which can be applied to the beginning of a unit's name to multiply or divide the unit by powers of 10 or 1,000. This is standard for units like meters and grams, but is rarely applied to measurements of time other than when a unit of less than one second is needed, most commonly in various fields of science and engineering such as physics and electronics.
* The '''{{w|Gettysburg Address}}''', a famous speech delivered by U.S. president Abraham Lincoln in 1863, where he began by referring to the signing of the Declaration of Independence taking place "four score and seven years ago". A score is a dated term for the number 20, so "four score and seven" is equivalent to 87.
* A '''dog year''' is traditionally considered to be one-seventh the length of a normal human year, since a dog's overall lifespan is roughly one-seventh of a typical human's. The comic applies this to other units of time, such as minutes and months, each of which is also one-seventh the length of the standard unit. The number 7 (traditionally a "lucky number") is also used in many of the numbers quoted in the calendar.
* Other comparative durations of time that are not normally or usefully applied to day-length multiples. At the top end, there is the age of the universe, at the other there is {{w|Planck_units#Planck_time|Planck-time}} – with entire durations of periods of human history and the time needed to watch popular TV/film franchises in-between – most of which require a non-trivial multiplier or divisor to bring them to the necessary scale required.
* A '''{{w|baker's dozen}}''' is 13, or one more than a normal dozen. Here, the "baker's" prefix can be applied to any unit by adding an extra one of its constituent parts, like an extra hour added to a day.
* '''{{w|Irrational numbers}}''' like {{w|pi}} (3.14159...), {{w|Euler's number}} or ''e'' (2.71828...), the {{w|golden ratio}} (1.61803...), and the {{w|square root of 2}} (1.41421...). These are all interesting numbers because of their mathematical properties, but very impractical to use as arbitrary measurements of time because they have an endless series of non-repeating decimal digits.
* The teenage dating game '''{{w|Seven minutes in heaven}}'''.
* Rotation and revolution periods of various planets and moons in the Solar System.

{| class="wikitable"
|-
! Days !! Date !! Units !! Value in days !! Explanation
|-
| 83 || Jun 22 || πe millidecades || 82.03 days || π ≈ 3.14159, e ≈ 2.718, so πe is about 22.459. A millidecade is 1/1000 decade, or 1/100 year, or 3.652425 days. Multiplying these results in 82.03 days. This is a play on {{w|Euler's identity}}, eiπ=-1, but raising pi to the power of e instead.
|-
| 82 || Jun 23 || 7 megaseconds || 81.02 days || 7,000,000 seconds
|-
| 81 || Jun 24 || e lunar months || 80.27 days || A lunar month ≈ 29.53059 days, e ≈ 2.718
|-
| 80 || Jun 25 || 60 rotations of Foucault's pendulum in Paris || 79.67 days || '''{{w|Paris}}''' is the capital city of '''{{w|France}}''' and it's located at a latitude of 48º 51' 23" N. '''{{w|Foucault's pendulum}}''' is a device conceived by French physicist '''{{w|Léon Foucault}}''', consisting of a pendulum that is free to rotate its plane of oscillation. When placed in a rotating '''{{w|Non-inertial reference frame}}''' such as the '''{{w|Earth}}''', that has an associated rotation period of 24 hours, the oscillation plane of Foucault's pendulum rotates at a rate determined by the Earth's period and the angle between the rotation axis of the frame of reference and the direction of its elongation in resting position, i.e. its latitude, with a period T = T🜨/sin(λ), being T🜨 Earth's period and λ the latitude of the pendulum. Historically, Léon Foucault performed this experiment in the city of Paris, most famously (although not for the first time, which happened at the '''{{w|Paris Observatory}}''') under the dome of the '''{{w|Panthéon}}''', to demonstrate Earth's rotation. At this latitude, Foucault's pendulum completes a full rotation every 31.8 hours.
|-
| 79 || Jun 26 || 8 milligenerations || 78.89 days || A generation is in general 22-33 years, with a reasonable mid-point of 27; and 8 x 0.001 (milli) x 365.2425 (accounting for leap years) x 27 ≈ 78.89 days
|-
| 78 || Jun 27 || 777,777 dog minutes || 77.16 days || A popular myth is that dogs age 7 times faster than humans, so 1 dog minute equals 1/7 human minutes.
|-
| 77 || Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads) || 77 days || 7!=7x6x5x4x3x2x1=5040 - The standard episode of ''Jeopardy'' is 22-26 minutes skipping ads - taking the lowest value you get 110880 minutes total, which is the exact value needed.
|-
| 76 || Jun 29 || 5,000 repeats of ''99 Bottles of Beer'' || 76.39 days || Each verse of {{w|99 Bottles of Beer}} is "''N'' bottles of beer on the wall, ''N'' bottles of beer. Take one down, pass it around, ''N-1'' bottles of beer on the wall." The entire song contains 99 verses. Randall apparently sings this rather slowly at around 72 bpm, taking about 13 seconds per verse.
|-
| 75 || Jun 30 || 5 baker's fortnights (15 days) || 75 days || A {{w|baker's dozen}} is a dozen (12) plus 1 extra item. Randall has generalized this to adding 1 to any unit. A fortnight is 2 weeks, so a baker's fortnight is 15 days. 5x15 is 75 days.
|-
| 74 || Jul 1 || √2 dog years || 73.79 days || See day 78 (Jun 27)
|-
| 73 || Jul 2 || π millivics (1/1000th of Queen Victoria's reign) || 72.97 days || {{w|Queen Victoria}} ruled between 20 June 1837 and 22 January 1901 (23,226 days).
|-
| 72 || Jul 3 || 42 drives from NYC to LA (Google Maps estimate) || 71.75 days || According to Google Maps, the drive from New York City to Los Angeles via I-80 W (2789 miles or 4489 km) takes 41 hours.
|-
| 71 || Jul 4 || 1,000 viewings of ''Groundhog Day''|| 70.14 days || Using {{w|Groundhog Day (film)|Groundhog Day's}} 101-minute run time.
|-
| 70 || Jul 5 || 100,000 minutes || 69.44 days ||
|-
| 69 || Jul 6 || 1/10th of Martian year || 68.70 Earth days || Martian sidereal and tropical years both round to 687.0 Earth days
|-
| 68 || Jul 7 || 1,234,567 sound-miles || 67.63 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 67.6349058 days.
|-
| 67 || Jul 8 || 2πe seconds || 66.74 days || 2^(π^e) = 5,766,073 seconds
|-
| 66 || Jul 9 || 216 beats (Swatch Internet Time) || 65.54 days || {{w|.beat}} is equal to 1/1000 day.
|-
| 65 || Jul 10 || 1,000 ISS orbits || 64.58 days || Each orbit of the ISS takes 90-93 minutes. Here a value of 93 minutes is used.
|-
| 64 || Jul 11 || Five hundred twenty five thousand (base seven) minutes|| 62.88 days || This refers to {{w|radix}}-7 arithmetic: 525,0007 minutes = 90,55210 minutes. Also references the opening and recurring line "Five hundred twenty five thousand six hundred minutes" from {{w|Seasons of Love}}, a song from the musical {{w|Rent (musical)|''Rent''}}, which is also referenced in [[1047: Approximations]]. "base seven" has the same rhythm as "six hundred".
|-
| 63 || Jul 12 || 1050 Planck times || 62.38 days || 10^50 x 5.39 x 10^-44 seconds
|-
| 62 || Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)|| 62.50 days || {{w|The Office (British TV series)|''The Office''}} was originally a {{w|BBC}} television show which had no commercial breaks, but Randall is obviously more familiar with the {{w|The_Office_(American_TV_series)|US version}}. This US "half-hour" comedy format contains 22.5 minutes of content (including the title sequence) and 7.5 minutes of ads. 
|-
| 61 || Jul 14 || Four score and seven kilominutes || 60.42 days || 87 x 1000 minutes
|-
| 60 || Jul 15 || 2 lunar months || 59.06 days || There are a number of different ways to define the {{w|lunar month}}. The most common is the synodic month, because it relates to the phases of the moon, and it's approximately 29.53 days.
|-
| 59 || Jul 16 || Half a day on Venus || 58.375 days || A Venus synodic day is 116 days 18 hours.
|-
| 58 || Jul 17 || 5 megaseconds || 57.8704 days || 5,000,000 seconds
|-
| 57 || Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature) || 4681~4763 years × 10-6 || Randall is stating that "literature" was invented approximately 2700 BCE. This is consistent with the earliest surviving coherent Sumerian texts, but the earliest proto-writing likely developed at least 500 years earlier according to {{w|History of writing}}.
|-
| 56 || Jul 19 || 1,000 viewings of ''Run Lola Run'' || 55.556 days || Using {{w|Run Lola Run|the movie's}} run time of 80 minutes.
|-
| 55 || Jul 20 || One million sound-miles || 54.78 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 54.7843137 days.
|-
| 54 || Jul 21 || 30 Ionian months || 53.0741 days || Orbital period of Io around Jupiter is approximately 1.77 days.
|-
| 53 || Jul 22 || One dog year || 52.18 days || See day 78 (Jun 27)
|-
| 52 || Jul 23 || 60 viewings of ''Star Wars Episodes I-IX'' || 51.75 days || According to [https://dorksideoftheforce.com/2021/05/04/how-long-to-watch-every-star-wars-movie/ Fansided] the combined running times are 20 hours 42 minutes.
|-
| 51 || Jul 24 || 1/100,000,000,000th of the universe's age || 50.40 days || The universe is estimated to be about 13.8 billion years old.
|-
| 50 || Jul 25 || 5 milli-generations || 49.3 days || See day 79 (Jun 26)
|-
| 49 || Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven'' || 48.61 days || {{w|Seven minutes in heaven}} is an Anglo-culture teenager game, occuring in several movies. 10,000 minutes in Heaven is almost a week of making out (or doing whatever in a broom closet), so this game is unlikely.
|-
| 48 || Jul 27 || φeπ minutes || 47.62 days || 68,567.57 minutes
|-
| 47 || Jul 28 || 4 megaseconds || 46.30 days || 4,000,000 seconds
|-
| 46 || Jul 29 || 216 minutes || 45.51 days || 65,536 minutes
|-
| 45 || Jul 30 || eee seconds || 44.15 days || 3,814,279.10 seconds
|-
| 44 || Jul 31 || π fortnights|| 43.98 days || 3.14159 x 14 days
|-
| 43 || Aug 1 || One devil's spacewalk (666 orbits of the ISS) || 43.01 days || See day 65 (Jul 10). 666 is the {{w|number of the beast}}.
|-
| 42 || Aug 2 || 1 kilowatt-hour per watt || 41.66 days || 1000 hours
|-
| 41 || Aug 3 || eπ Ionian months || 40.94 days || Orbital period of Io around Jupiter is 1.769137786 days
|-
| 40 || Aug 4 || 30 rotations of Foucault's pendulum in Paris || 39.84 days || Refer to Day 80 (Jun 25)
|-
| 39 || Aug 5 || e fortnights || 38.06 days ||2.71828 x 14 days
|-
| 38 || Aug 6 || πe baker's days (25 hours) || 37.98 days || See day 75 (Jun 30)
|-
| 37 || Aug 7 || One deciyear || 36.52 days || One tenth of one year
|-
| 36 || Aug 8 || 7! milliweeks || 35.28 days || 5040 × 0.001 weeks
|-
| 35 || Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music || 34.72 days || ''Think'' is the music played while the contestants try to answer the Final Jeopardy question; it is 30 seconds long.
|-
| 34 || Aug 10 || 1000 basketball games (game time) || 33.33 days || Uses the NBA game time of four 12-minute quarters, or 48 minutes
|-
| 33 || Aug 11 || 777 hours || 32.38 days ||
|-
| 32 || Aug 12 || One millilincoln (1/1000 of fourscore and seven years) || 31.78 days || {{w|Abraham Lincoln}}'s {{w|Gettysburg Address}} begins with the famous phrase "Four score and seven years ago". 1 score = twenty. 
|-
| 31 || Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads) || 31.25 days || Uses a television 'hour' containing 45 minutes of content and 15 minutes of ads
|-
| 30 || Aug 14 || All of ''Star Trek'', consecutively || ||
|-
| 29 || Aug 15 || 777,777 nanocenturies || 28.41 days || 777,777 × 10-9 × 100 years
|-
| 28 || Aug 16 || One sidereal lunar month || 27.3 days || The time it takes moon to return to the same position relative to the fixed stars
|-
| 27 || Aug 17 || 6 dog months || 26.1 days || See day 78 (Jun 27)
|-
| 26 || Aug 18 || ππ kilominutes || 25.32 days || 36,462.16 minutes
|-
| 25 || Aug 19 || 7 games of 7! minutes in Heaven || 24.5 days || 7 x 5040 (7 {{w|Factorial}}) minutes. See also day 49 (Jul 26).
|-
| 24 || Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy || 23.82 days || ''The Fellowship of the Ring'' extended version is 208 minutes, ''The Two Towers'' is 226 minutes, and ''The Return of the King'' is 252 minutes for its e.v., according to [https://fictionhorizon.com/how-long-are-all-the-lord-of-the-rings-and-the-hobbit-movies-combined/ FictionHorizon.com]
|-
| 23 || Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times || 22.21 days || See day 72 (Jul 3). This is for 6 round-trips and 1 one-way trip.
|-
| 22 || Aug 22 || ''It's a Small World'' sung at 1/10,000th speed || 21.18 days || {{w|It's a Small World}} is a song that was composed for the attraction of the same name at various {{w|Disney}} theme parks, and plays continuously at them in various languages.
|-
| 21 || Aug 23 || 500 hours || 20.83 days ||
|-
| 20 || Aug 24 || √2 fortnights || 19.80 days || 1.4142 × 14 days
|-
| 19 || Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles || 18.94 days || {{w|Vanessa Carlton}} is an American singer, and {{w|A Thousand Miles}} is her most successful song. Randall estimates her walking speed at about 2.2 miles/hour.
|-
| 18 || Aug 26 || 100,000 breaths || 15 seconds per breath for 17 days || Normal respiratory rate for adults is typically 12-20 breaths per minute, or abou 3-4 seconds each. Randall may be a practitioner of "slow breathing".
|-
| 17 || Aug 27 || √2 megaseconds || 16.37 days || 1.4142 × 1,000,000 seconds
|-
| 16 || Aug 28 || πππ πcoseconds || 15.51 days || 1.3402 × 1018 picoseconds (i.e., 10-12 seconds), making a joke how the mathematical "pi" is written with the character "π"
|-
| 15 || Aug 29 || One baker's fortnight (15 days) || 15 days || See day 75 (Jun 30)
|-
| 14 || Aug 30 || One baker's dozen (13) baker's days (25 hours) || 13.54 days || 325 hours; see day 75 (Jun 30)
|-
| 13 || Aug 31 || 300 hours || 12.5 days ||
|-
| 12 || Sep 1 || One million seconds || 11.57 days ||
|-
| 11 || Sep 2 || One nonstop bike ride from NYC to LA || 10.54 days || Google maps estimates the trip at 253 hours
|-
| 10 || Sep 3 || 1⁄1,000th of a generation || 9.86 days || See day 79 (Jun 26)
|-
| 9 || Sep 4 || 777,777 seconds || 9.002 days ||
|-
| 8 || Sep 5 || 100 viewings of ''Groundhog Day'' || 7.01 days || See Day 71 (Jul 4).
|-
| 7 || Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven) || 6.04 days || 8,700 minutes
|-
| 6 || Sep 7 || One pico-universe-lifetime || 5.04 days || See Day 51 (Jul 24)
|-
| 5 || Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks || 4.63 days || The chorus lasts about 8 seconds per 'person'
|-
| 4 || Sep 9 || One centiyear || 3.652425 days || 365.24 days * 1/100
|-
| 3 || Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times || 2.79 days || Based on a length of 4 minutes, 1 second
|-
| 2 || Sep 11 || ''Speed'' (1994) played at one frame per second || 1.9 days || {{w|Speed_(1994_film)}} has runtime of 116 minutes = 6,960 seconds = 167,040 film frames at standard frame rate of 24 frames/second
|-
| 1 || Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1) || 0.76 days || Each iteration contains ''N'' verses. ''N + N-1 + N-2 ... + 1'' equals ''N * (N+1) / 2'', so 99 recursions = 4950 verses. Using the same 13-second (72 bpm) rate as Jun 29, this is close to 18 hours. Probably refers to Donald Knuth's article {{w|The Complexity of Songs}}.
|-
| 0 || Sep 13 || ''What If? 2'' release day || N/A ||
|}

The title text refers to the recursive time period on Sep 12. If you don't stop when you reach N=0 bottles, the repetition never ends, so that time interval becomes infinite. He likens it to {{w|The Song That Never Ends}}, another repetitive children's song, which is specifically intended to go on forever. The difference is that the Beer song has a natural stopping point at 0, while ''The Song That Never Ends'' is completely repetitive.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

Large heading: Countdown to ''What if? 2''

Subheading: (Preorder at [https://xkcd.com/whatif2 xkcd.com/whatif2] to get it at the end of the countdown)

Remainder of comic is a calendar with the date in one corner of each day's box.

{| class="wikitable"
|-
! Date !! Description
|-
| Jun 22 || πe millidecades
|-
| Jun 23 || 7 megaseconds
|-
| Jun 24 || e lunar months
|-
| Jun 25 || 60 rotations of Foucault's pendulum in Paris
|-
| Jun 26 || 8 milligenerations
|-
| Jun 27 || 777,777 dog minutes
|-
| Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads)
|-
| Jun 29 || 5,000 repeats of ''99 Bottles of Beer''
|-
| Jun 30 || 5 baker's fortnights (15 days)
|-
| Jul 1 || √2 dog years
|-
| Jul 2 || π millivics (1/1000th of Queen Victoria's reign)
|-
| Jul 3 || 42 drives from NYC to LA (Google Maps estimate)
|-
| Jul 4 || 1,000 viewings of ''Groundhog Day''
|-
| Jul 5 || 100,000 minutes
|-
| Jul 6 || 1/10th of Martian year
|-
| Jul 7 || 1,234,567 sound-miles
|-
| Jul 8 || 2πe seconds
|-
| Jul 9 || 216 beats (Swatch Internet Time)
|-
| Jul 10 || 1,000 ISS orbits
|-
| Jul 11 || Five hundred twenty five thousand (base seven) minutes (text preceded by several drawn musical notes)
|-
| Jul 12 || 1050 Planck times
|-
| Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)
|-
| Jul 14 || Four score and seven kilominutes
|-
| Jul 15 || 2 lunar months
|-
| Jul 16 || Half a day on Venus
|-
| Jul 17 || 5 megaseconds
|-
| Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature)
|-
| Jul 19 || 1,000 viewings of ''Run Lola Run''
|-
| Jul 20 || One million sound-miles
|-
| Jul 21 || 30 Ionian months
|-
| Jul 22 || One dog year
|-
| Jul 23 || 60 viewings of ''Star Wars Episodes I-IX''
|-
| Jul 24 || 1/100,000,000,000th of the universe's age
|-
| Jul 25 || 5 milli-generations
|-
| Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven''
|-
| Jul 27 || φeπ minutes
|-
| Jul 28 || 4 megaseconds
|-
| Jul 29 || 216 minutes
|-
| Jul 30 || eee seconds
|-
| Jul 31 || π fortnights
|-
| Aug 1 || one devil's spacewalk (666 orbits of the ISS)
|-
| Aug 2 || 1 kilowatt-hour per watt
|-
| Aug 3 || eπ Ionian months
|-
| Aug 4 || 30 rotations of Foucault's pendulum in Paris
|-
| Aug 5 || e fortnights
|-
| Aug 6 || πe baker's days (25 hours)
|-
| Aug 7 || one deciyear
|-
| Aug 8 || 7! milliweeks
|-
| Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music
|-
| Aug 10 || 1000 basketball games (game time)
|-
| Aug 11 || 777 hours
|-
| Aug 12 || one millilincoln (1/1000 of fourscore and seven years)
|-
| Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads)
|-
| Aug 14 || All of ''Star Trek'', consecutively
|-
| Aug 15 || 777,777 nanocenturies
|-
| Aug 16 || one sidereal lunar month
|-
| Aug 17 || 6 dog months
|-
| Aug 18 || ππ kilominutes
|-
| Aug 19 || 7 games of ''7! minutes in Heaven''
|-
| Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy
|-
| Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times
|-
| Aug 22 || ''It's a Small World'' sung at 1/10,000th speed
|-
| Aug 23 || 500 hours
|-
| Aug 24 || √2 fortnights
|-
| Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles
|-
| Aug 26 || 100,000 breaths
|-
| Aug 27 || √2 megaseconds
|-
| Aug 28 || πππ πcoseconds
|-
| Aug 29 || One baker's fortnight (15 days)
|-
| Aug 30 || One baker's dozen (13) baker's days (25 hours)
|-
| Aug 31 || 300 hours
|-
| Sep 1 || One million seconds
|-
| Sep 2 || One nonstop bike ride from NYC to LA
|-
| Sep 3 || 1⁄1,000th of a generation
|-
| Sep 4 || 777,777 seconds
|-
| Sep 5 || 100 viewings of ''Groundhog Day''
|-
| Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven)
|-
| Sep 7 || One pico-universe-lifetime
|-
| Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks
|-
| Sep 9 || One centiyear
|-
| Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times
|-
| Sep 11 || ''Speed'' (1994) played at one frame per second
|-
| Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1)
|-
| Sep 13 || ''What If? 2'' release day
|}
{{comic discussion}}
[[Category:Book promotion]]
[[Category:Comics featuring real people]]
[[Category:Songs]]
[[Category:Animals]]

2636: What If? 2 Countdown

2022-06-24T19:34:56Z

162.158.166.183: /* Explanation */ round to two significant digits of days, makes the table look nicer, and 14.4 minute precision is more than enough for explaining so many; too many sig-digs just distracts

{{comic
| number = 2636
| date = June 22, 2022
| title = What If? 2 Countdown
| image = what_if_2_countdown.png
| titletext = If you don't end the 99 Bottles of Beer recursion at N=0 it just becomes The Other Song That Never Ends.
}}

==Explanation==
{{incomplete|Created by FOUR SCORE AND 7 BOTTLES OF BEER ON THE WALL - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
This comic takes the idea of {{w|Advent calendar}}s, and takes it to the extreme. It uses rather absurd and/or obscure ways to measure the amount of time until [[Randall]]'s new book ''What if? 2'' is released, with esoteric units or esoteric numbers. And often both.

Some concepts that appear several times throughout the calendar are:

* '''{{w|SI prefixes}}''', which can be applied to the beginning of a unit's name to multiply or divide the unit by powers of 10 or 1,000. This is standard for units like meters and grams, but is rarely applied to measurements of time other than when a unit of less than one second is needed, most commonly in various fields of science and engineering such as physics and electronics.
* The '''{{w|Gettysburg Address}}''', a famous speech delivered by U.S. president Abraham Lincoln in 1863, where he began by referring to the signing of the Declaration of Independence taking place "four score and seven years ago". A score is a dated term for the number 20, so "four score and seven" is equivalent to 87.
* A '''dog year''' is traditionally considered to be one-seventh the length of a normal human year, since a dog's overall lifespan is roughly one-seventh of a typical human's. The comic applies this to other units of time, such as minutes and months, each of which is also one-seventh the length of the standard unit. The number 7 (traditionally a "lucky number") is also used in many of the numbers quoted in the calendar.
* Other comparative durations of time that are not normally or usefully applied to day-length multiples. At the top end, there is the age of the universe, at the other there is {{w|Planck_units#Planck_time|Planck-time}} – with entire durations of periods of human history and the time needed to watch popular TV/film franchises in-between – most of which require a non-trivial multiplier or divisor to bring them to the necessary scale required.
* A '''{{w|baker's dozen}}''' is 13, or one more than a normal dozen. Here, the "baker's" prefix can be applied to any unit by adding an extra one of its constituent parts, like an extra hour added to a day.
* '''{{w|Irrational numbers}}''' like {{w|pi}} (3.14159...), {{w|Euler's number}} or ''e'' (2.71828...), the {{w|golden ratio}} (1.61803...), and the {{w|square root of 2}} (1.41421...). These are all interesting numbers because of their mathematical properties, but very impractical to use as arbitrary measurements of time because they have an endless series of non-repeating decimal digits.
* The teenage dating game '''{{w|Seven minutes in heaven}}'''.
* Rotation and revolution periods of various planets and moons in the Solar System.

{| class="wikitable"
|-
! Days !! Date !! Units !! Value in days !! Explanation
|-
| 83 || Jun 22 || πe millidecades || 82.0304 days || π ≈ 3.14159, e ≈ 2.718, so πe is about 22.459. A millidecade is 1/1000 decade, or 1/100 year, or 3.652425 days. Multiplying these results in 82.03 days. This is a play on {{w|Euler's identity}}, eiπ=-1, but raising pi to the power of e instead.
|-
| 82 || Jun 23 || 7 megaseconds || 81.02 days || 7,000,000 seconds
|-
| 81 || Jun 24 || e lunar months || 80.27 days || A lunar month ≈ 29.53059 days, e ≈ 2.718
|-
| 80 || Jun 25 || 60 rotations of Foucault's pendulum in Paris || 79.67 days || '''{{w|Paris}}''' is the capital city of '''{{w|France}}''' and it's located at a latitude of 48º 51' 23" N. '''{{w|Foucault's pendulum}}''' is a device conceived by French physicist '''{{w|Léon Foucault}}''', consisting of a pendulum that is free to rotate its plane of oscillation. When placed in a rotating '''{{w|Non-inertial reference frame}}''' such as the '''{{w|Earth}}''', that has an associated rotation period of 24 hours, the oscillation plane of Foucault's pendulum rotates at a rate determined by the Earth's period and the angle between the rotation axis of the frame of reference and the direction of its elongation in resting position, i.e. its latitude, with a period T = T🜨/sin(λ), being T🜨 Earth's period and λ the latitude of the pendulum. Historically, Léon Foucault performed this experiment in the city of Paris, most famously (although not for the first time, which happened at the '''{{w|Paris Observatory}}''') under the dome of the '''{{w|Panthéon}}''', to demonstrate Earth's rotation. At this latitude, Foucault's pendulum completes a full rotation every 31.8 hours.
|-
| 79 || Jun 26 || 8 milligenerations || 78.89 days || A generation is in general 22-33 years, with a reasonable mid-point of 27; and 8 x 0.001 (milli) x 365.2425 (accounting for leap years) x 27 ≈ 78.89 days
|-
| 78 || Jun 27 || 777,777 dog minutes || 77.16 days || A popular myth is that dogs age 7 times faster than humans, so 1 dog minute equals 1/7 human minutes.
|-
| 77 || Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads) || 77 days || 7!=7x6x5x4x3x2x1=5040 - The standard episode of ''Jeopardy'' is 22-26 minutes skipping ads - taking the lowest value you get 110880 minutes total, which is the exact value needed.
|-
| 76 || Jun 29 || 5,000 repeats of ''99 Bottles of Beer'' || 76.39 days || Each verse of {{w|99 Bottles of Beer}} is "''N'' bottles of beer on the wall, ''N'' bottles of beer. Take one down, pass it around, ''N-1'' bottles of beer on the wall." The entire song contains 99 verses. Randall apparently sings this rather slowly at around 72 bpm, taking about 13 seconds per verse.
|-
| 75 || Jun 30 || 5 baker's fortnights (15 days) || 75 days || A {{w|baker's dozen}} is a dozen (12) plus 1 extra item. Randall has generalized this to adding 1 to any unit. A fortnight is 2 weeks, so a baker's fortnight is 15 days. 5x15 is 75 days.
|-
| 74 || Jul 1 || √2 dog years || 73.79 days || See day 78 (Jun 27)
|-
| 73 || Jul 2 || π millivics (1/1000th of Queen Victoria's reign) || 72.97 days || {{w|Queen Victoria}} ruled between 20 June 1837 and 22 January 1901 (23,226 days).
|-
| 72 || Jul 3 || 42 drives from NYC to LA (Google Maps estimate) || 71.75 days || According to Google Maps, the drive from New York City to Los Angeles via I-80 W (2789 miles or 4489 km) takes 41 hours.
|-
| 71 || Jul 4 || 1,000 viewings of ''Groundhog Day''|| 70.14 days || Using {{w|Groundhog Day (film)|Groundhog Day's}} 101-minute run time.
|-
| 70 || Jul 5 || 100,000 minutes || 69.44 days ||
|-
| 69 || Jul 6 || 1/10th of Martian year || 68.70 Earth days || Martian sidereal and tropical years both round to 687.0 Earth days
|-
| 68 || Jul 7 || 1,234,567 sound-miles || 67.63 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 67.6349058 days.
|-
| 67 || Jul 8 || 2πe seconds || 66.74 days || 2^(π^e) = 5,766,073 seconds
|-
| 66 || Jul 9 || 216 beats (Swatch Internet Time) || 65.54 days || {{w|.beat}} is equal to 1/1000 day.
|-
| 65 || Jul 10 || 1,000 ISS orbits || 64.58 days || Each orbit of the ISS takes 90-93 minutes. Here a value of 93 minutes is used.
|-
| 64 || Jul 11 || Five hundred twenty five thousand (base seven) minutes|| 62.88 days || This refers to {{w|radix}}-7 arithmetic: 525,0007 minutes = 90,55210 minutes. Also references the opening and recurring line "Five hundred twenty five thousand six hundred minutes" from {{w|Seasons of Love}}, a song from the musical {{w|Rent (musical)|''Rent''}}, which is also referenced in [[1047: Approximations]]. "base seven" has the same rhythm as "six hundred".
|-
| 63 || Jul 12 || 1050 Planck times || 62.38 days || 10^50 x 5.39 x 10^-44 seconds
|-
| 62 || Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)|| 62.50 days || {{w|The Office (British TV series)|''The Office''}} was originally a {{w|BBC}} television show which had no commercial breaks, but Randall is obviously more familiar with the {{w|The_Office_(American_TV_series)|US version}}. This US "half-hour" comedy format contains 22.5 minutes of content (including the title sequence) and 7.5 minutes of ads. 
|-
| 61 || Jul 14 || Four score and seven kilominutes || 60.42 days || 87 x 1000 minutes
|-
| 60 || Jul 15 || 2 lunar months || 59.06 days || There are a number of different ways to define the {{w|lunar month}}. The most common is the synodic month, because it relates to the phases of the moon, and it's approximately 29.53 days.
|-
| 59 || Jul 16 || Half a day on Venus || 58.375 days || A Venus synodic day is 116 days 18 hours.
|-
| 58 || Jul 17 || 5 megaseconds || 57.8704 days || 5,000,000 seconds
|-
| 57 || Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature) || 4681~4763 years × 10-6 || Randall is stating that "literature" was invented approximately 2700 BCE. This is consistent with the earliest surviving coherent Sumerian texts, but the earliest proto-writing likely developed at least 500 years earlier according to {{w|History of writing}}.
|-
| 56 || Jul 19 || 1,000 viewings of ''Run Lola Run'' || 55.556 days || Using {{w|Run Lola Run|the movie's}} run time of 80 minutes.
|-
| 55 || Jul 20 || One million sound-miles || 54.78 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 54.7843137 days.
|-
| 54 || Jul 21 || 30 Ionian months || 53.0741 days || Orbital period of Io around Jupiter is approximately 1.77 days.
|-
| 53 || Jul 22 || One dog year || 52.18 days || See day 78 (Jun 27)
|-
| 52 || Jul 23 || 60 viewings of ''Star Wars Episodes I-IX'' || 51.75 days || According to [https://dorksideoftheforce.com/2021/05/04/how-long-to-watch-every-star-wars-movie/ Fansided] the combined running times are 20 hours 42 minutes.
|-
| 51 || Jul 24 || 1/100,000,000,000th of the universe's age || 50.40 days || The universe is estimated to be about 13.8 billion years old.
|-
| 50 || Jul 25 || 5 milli-generations || 49.3 days || See day 79 (Jun 26)
|-
| 49 || Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven'' || 48.61 days || {{w|Seven minutes in heaven}} is an Anglo-culture teenager game, occuring in several movies. 10,000 minutes in Heaven is almost a week of making out (or doing whatever in a broom closet), so this game is unlikely.
|-
| 48 || Jul 27 || φeπ minutes || 47.62 days || 68,567.57 minutes
|-
| 47 || Jul 28 || 4 megaseconds || 46.30 days || 4,000,000 seconds
|-
| 46 || Jul 29 || 216 minutes || 45.51 days || 65,536 minutes
|-
| 45 || Jul 30 || eee seconds || 44.15 days || 3,814,279.10 seconds
|-
| 44 || Jul 31 || π fortnights|| 43.98 days || 3.14159 x 14 days
|-
| 43 || Aug 1 || One devil's spacewalk (666 orbits of the ISS) || 43.01 days || See day 65 (Jul 10). 666 is the {{w|number of the beast}}.
|-
| 42 || Aug 2 || 1 kilowatt-hour per watt || 41.66 days || 1000 hours
|-
| 41 || Aug 3 || eπ Ionian months || 40.94 days || Orbital period of Io around Jupiter is 1.769137786 days
|-
| 40 || Aug 4 || 30 rotations of Foucault's pendulum in Paris || 39.84 days || Refer to Day 80 (Jun 25)
|-
| 39 || Aug 5 || e fortnights || 38.06 days ||2.71828 x 14 days
|-
| 38 || Aug 6 || πe baker's days (25 hours) || 37.98 days || See day 75 (Jun 30)
|-
| 37 || Aug 7 || One deciyear || 36.52 days || One tenth of one year
|-
| 36 || Aug 8 || 7! milliweeks || 35.28 days || 5040 × 0.001 weeks
|-
| 35 || Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music || 34.72 days || ''Think'' is the music played while the contestants try to answer the Final Jeopardy question; it is 30 seconds long.
|-
| 34 || Aug 10 || 1000 basketball games (game time) || 33.33 days || Uses the NBA game time of four 12-minute quarters, or 48 minutes
|-
| 33 || Aug 11 || 777 hours || 32.38 days ||
|-
| 32 || Aug 12 || One millilincoln (1/1000 of fourscore and seven years) || 31.78 days || {{w|Abraham Lincoln}}'s {{w|Gettysburg Address}} begins with the famous phrase "Four score and seven years ago". 1 score = twenty. 
|-
| 31 || Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads) || 31.25 days || Uses a television 'hour' containing 45 minutes of content and 15 minutes of ads
|-
| 30 || Aug 14 || All of ''Star Trek'', consecutively || ||
|-
| 29 || Aug 15 || 777,777 nanocenturies || 28.41 days || 777,777 × 10-9 × 100 years
|-
| 28 || Aug 16 || One sidereal lunar month || 27.3 days || The time it takes moon to return to the same position relative to the fixed stars
|-
| 27 || Aug 17 || 6 dog months || 26.1 days || See day 78 (Jun 27)
|-
| 26 || Aug 18 || ππ kilominutes || 25.32 days || 36,462.16 minutes
|-
| 25 || Aug 19 || 7 games of 7! minutes in Heaven || 24.5 days || 7 x 5040 (7 {{w|Factorial}}) minutes. See also day 49 (Jul 26).
|-
| 24 || Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy || 23.82 days || ''The Fellowship of the Ring'' extended version is 208 minutes, ''The Two Towers'' is 226 minutes, and ''The Return of the King'' is 252 minutes for its e.v., according to [https://fictionhorizon.com/how-long-are-all-the-lord-of-the-rings-and-the-hobbit-movies-combined/ FictionHorizon.com]
|-
| 23 || Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times || 22.21 days || See day 72 (Jul 3). This is for 6 round-trips and 1 one-way trip.
|-
| 22 || Aug 22 || ''It's a Small World'' sung at 1/10,000th speed || 21.18 days || {{w|It's a Small World}} is a song that was composed for the attraction of the same name at various {{w|Disney}} theme parks, and plays continuously at them in various languages.
|-
| 21 || Aug 23 || 500 hours || 20.83 days ||
|-
| 20 || Aug 24 || √2 fortnights || 19.80 days || 1.4142 × 14 days
|-
| 19 || Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles || 18.94 days || {{w|Vanessa Carlton}} is an American singer, and {{w|A Thousand Miles}} is her most successful song. Randall estimates her walking speed at about 2.2 miles/hour.
|-
| 18 || Aug 26 || 100,000 breaths || 15 seconds per breath for 17 days || Normal respiratory rate for adults is typically 12-20 breaths per minute, or abou 3-4 seconds each. Randall may be a practitioner of "slow breathing".
|-
| 17 || Aug 27 || √2 megaseconds || 16.37 days || 1.4142 × 1,000,000 seconds
|-
| 16 || Aug 28 || πππ πcoseconds || 15.51 days || 1.3402 × 1018 picoseconds (i.e., 10-12 seconds), making a joke how the mathematical "pi" is written with the character "π"
|-
| 15 || Aug 29 || One baker's fortnight (15 days) || 15 days || See day 75 (Jun 30)
|-
| 14 || Aug 30 || One baker's dozen (13) baker's days (25 hours) || 13.54 days || 325 hours; see day 75 (Jun 30)
|-
| 13 || Aug 31 || 300 hours || 12.5 days ||
|-
| 12 || Sep 1 || One million seconds || 11.57 days ||
|-
| 11 || Sep 2 || One nonstop bike ride from NYC to LA || 10.54 days || Google maps estimates the trip at 253 hours
|-
| 10 || Sep 3 || 1⁄1,000th of a generation || 9.86 days || See day 79 (Jun 26)
|-
| 9 || Sep 4 || 777,777 seconds || 9.002 days ||
|-
| 8 || Sep 5 || 100 viewings of ''Groundhog Day'' || 7.01 days || See Day 71 (Jul 4).
|-
| 7 || Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven) || 6.04 days || 8,700 minutes
|-
| 6 || Sep 7 || One pico-universe-lifetime || 5.04 days || See Day 51 (Jul 24)
|-
| 5 || Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks || 4.63 days || The chorus lasts about 8 seconds per 'person'
|-
| 4 || Sep 9 || One centiyear || 3.652425 days || 365.24 days * 1/100
|-
| 3 || Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times || 2.79 days || Based on a length of 4 minutes, 1 second
|-
| 2 || Sep 11 || ''Speed'' (1994) played at one frame per second || 1.9 days || {{w|Speed_(1994_film)}} has runtime of 116 minutes = 6,960 seconds = 167,040 film frames at standard frame rate of 24 frames/second
|-
| 1 || Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1) || 0.76 days || Each iteration contains ''N'' verses. ''N + N-1 + N-2 ... + 1'' equals ''N * (N+1) / 2'', so 99 recursions = 4950 verses. Using the same 13-second (72 bpm) rate as Jun 29, this is close to 18 hours. Probably refers to Donald Knuth's article {{w|The Complexity of Songs}}.
|-
| 0 || Sep 13 || ''What If? 2'' release day || N/A ||
|}

The title text refers to the recursive time period on Sep 12. If you don't stop when you reach N=0 bottles, the repetition never ends, so that time interval becomes infinite. He likens it to {{w|The Song That Never Ends}}, another repetitive children's song, which is specifically intended to go on forever. The difference is that the Beer song has a natural stopping point at 0, while ''The Song That Never Ends'' is completely repetitive.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

Large heading: Countdown to ''What if? 2''

Subheading: (Preorder at [https://xkcd.com/whatif2 xkcd.com/whatif2] to get it at the end of the countdown)

Remainder of comic is a calendar with the date in one corner of each day's box.

{| class="wikitable"
|-
! Date !! Description
|-
| Jun 22 || πe millidecades
|-
| Jun 23 || 7 megaseconds
|-
| Jun 24 || e lunar months
|-
| Jun 25 || 60 rotations of Foucault's pendulum in Paris
|-
| Jun 26 || 8 milligenerations
|-
| Jun 27 || 777,777 dog minutes
|-
| Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads)
|-
| Jun 29 || 5,000 repeats of ''99 Bottles of Beer''
|-
| Jun 30 || 5 baker's fortnights (15 days)
|-
| Jul 1 || √2 dog years
|-
| Jul 2 || π millivics (1/1000th of Queen Victoria's reign)
|-
| Jul 3 || 42 drives from NYC to LA (Google Maps estimate)
|-
| Jul 4 || 1,000 viewings of ''Groundhog Day''
|-
| Jul 5 || 100,000 minutes
|-
| Jul 6 || 1/10th of Martian year
|-
| Jul 7 || 1,234,567 sound-miles
|-
| Jul 8 || 2πe seconds
|-
| Jul 9 || 216 beats (Swatch Internet Time)
|-
| Jul 10 || 1,000 ISS orbits
|-
| Jul 11 || Five hundred twenty five thousand (base seven) minutes (text preceded by several drawn musical notes)
|-
| Jul 12 || 1050 Planck times
|-
| Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)
|-
| Jul 14 || Four score and seven kilominutes
|-
| Jul 15 || 2 lunar months
|-
| Jul 16 || Half a day on Venus
|-
| Jul 17 || 5 megaseconds
|-
| Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature)
|-
| Jul 19 || 1,000 viewings of ''Run Lola Run''
|-
| Jul 20 || One million sound-miles
|-
| Jul 21 || 30 Ionian months
|-
| Jul 22 || One dog year
|-
| Jul 23 || 60 viewings of ''Star Wars Episodes I-IX''
|-
| Jul 24 || 1/100,000,000,000th of the universe's age
|-
| Jul 25 || 5 milli-generations
|-
| Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven''
|-
| Jul 27 || φeπ minutes
|-
| Jul 28 || 4 megaseconds
|-
| Jul 29 || 216 minutes
|-
| Jul 30 || eee seconds
|-
| Jul 31 || π fortnights
|-
| Aug 1 || one devil's spacewalk (666 orbits of the ISS)
|-
| Aug 2 || 1 kilowatt-hour per watt
|-
| Aug 3 || eπ Ionian months
|-
| Aug 4 || 30 rotations of Foucault's pendulum in Paris
|-
| Aug 5 || e fortnights
|-
| Aug 6 || πe baker's days (25 hours)
|-
| Aug 7 || one deciyear
|-
| Aug 8 || 7! milliweeks
|-
| Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music
|-
| Aug 10 || 1000 basketball games (game time)
|-
| Aug 11 || 777 hours
|-
| Aug 12 || one millilincoln (1/1000 of fourscore and seven years)
|-
| Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads)
|-
| Aug 14 || All of ''Star Trek'', consecutively
|-
| Aug 15 || 777,777 nanocenturies
|-
| Aug 16 || one sidereal lunar month
|-
| Aug 17 || 6 dog months
|-
| Aug 18 || ππ kilominutes
|-
| Aug 19 || 7 games of ''7! minutes in Heaven''
|-
| Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy
|-
| Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times
|-
| Aug 22 || ''It's a Small World'' sung at 1/10,000th speed
|-
| Aug 23 || 500 hours
|-
| Aug 24 || √2 fortnights
|-
| Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles
|-
| Aug 26 || 100,000 breaths
|-
| Aug 27 || √2 megaseconds
|-
| Aug 28 || πππ πcoseconds
|-
| Aug 29 || One baker's fortnight (15 days)
|-
| Aug 30 || One baker's dozen (13) baker's days (25 hours)
|-
| Aug 31 || 300 hours
|-
| Sep 1 || One million seconds
|-
| Sep 2 || One nonstop bike ride from NYC to LA
|-
| Sep 3 || 1⁄1,000th of a generation
|-
| Sep 4 || 777,777 seconds
|-
| Sep 5 || 100 viewings of ''Groundhog Day''
|-
| Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven)
|-
| Sep 7 || One pico-universe-lifetime
|-
| Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks
|-
| Sep 9 || One centiyear
|-
| Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times
|-
| Sep 11 || ''Speed'' (1994) played at one frame per second
|-
| Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1)
|-
| Sep 13 || ''What If? 2'' release day
|}
{{comic discussion}}
[[Category:Book promotion]]
[[Category:Comics featuring real people]]
[[Category:Songs]]
[[Category:Animals]]

2636: What If? 2 Countdown

2022-06-24T19:27:40Z

162.158.166.183: /* Explanation */ various copyedits; no need to imply Randall is sick

{{comic
| number = 2636
| date = June 22, 2022
| title = What If? 2 Countdown
| image = what_if_2_countdown.png
| titletext = If you don't end the 99 Bottles of Beer recursion at N=0 it just becomes The Other Song That Never Ends.
}}

==Explanation==
{{incomplete|Created by FOUR SCORE AND 7 BOTTLES OF BEER ON THE WALL - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
This comic takes the idea of {{w|Advent calendar}}s, and takes it to the extreme. It uses rather absurd and/or obscure ways to measure the amount of time until [[Randall]]'s new book ''What if? 2'' is released, with esoteric units or esoteric numbers. And often both.

Some concepts that appear several times throughout the calendar are:

* '''{{w|SI prefixes}}''', which can be applied to the beginning of a unit's name to multiply or divide the unit by powers of 10 or 1,000. This is standard for units like meters and grams, but is rarely applied to measurements of time other than when a unit of less than one second is needed, most commonly in various fields of science and engineering such as physics and electronics.
* The '''{{w|Gettysburg Address}}''', a famous speech delivered by U.S. president Abraham Lincoln in 1863, where he began by referring to the signing of the Declaration of Independence taking place "four score and seven years ago". A score is a dated term for the number 20, so "four score and seven" is equivalent to 87.
* A '''dog year''' is traditionally considered to be one-seventh the length of a normal human year, since a dog's overall lifespan is roughly one-seventh of a typical human's. The comic applies this to other units of time, such as minutes and months, each of which is also one-seventh the length of the standard unit. The number 7 (traditionally a "lucky number") is also used in many of the numbers quoted in the calendar.
* Other comparative durations of time that are not normally or usefully applied to day-length multiples. At the top end, there is the age of the universe, at the other there is {{w|Planck_units#Planck_time|Planck-time}} – with entire durations of periods of human history and the time needed to watch popular TV/film franchises in-between – most of which require a non-trivial multiplier or divisor to bring them to the necessary scale required.
* A '''{{w|baker's dozen}}''' is 13, or one more than a normal dozen. Here, the "baker's" prefix can be applied to any unit by adding an extra one of its constituent parts, like an extra hour added to a day.
* '''{{w|Irrational numbers}}''' like {{w|pi}} (3.14159...), {{w|Euler's number}} or ''e'' (2.71828...), the {{w|golden ratio}} (1.61803...), and the {{w|square root of 2}} (1.41421...). These are all interesting numbers because of their mathematical properties, but very impractical to use as arbitrary measurements of time because they have an endless series of non-repeating decimal digits.
* The teenage dating game '''{{w|Seven minutes in heaven}}'''.
* Rotation and revolution periods of various planets and moons in the Solar System.

{| class="wikitable"
|-
! Days !! Date !! Units !! Exact value !! Explanation
|-
| 83 || Jun 22 || πe millidecades || 82.0304 days || π ≈ 3.14159, e ≈ 2.718, so πe is about 22.459. A millidecade is 1/1000 decade, or 1/100 year, or 3.652425 days. Multiplying these results in 82.03 days. This is a play on {{w|Euler's identity}}, eiπ=-1, but raising pi to the power of e instead.
|-
| 82 || Jun 23 || 7 megaseconds || 81.0185 days || 7,000,000 seconds
|-
| 81 || Jun 24 || e lunar months || 80.27247 days || A lunar month ≈ 29.53059 days, e ≈ 2.718
|-
| 80 || Jun 25 || 60 rotations of Foucault's pendulum in Paris || 79.67 days || '''{{w|Paris}}''' is the capital city of '''{{w|France}}''' and it's located at a latitude of 48º 51' 23" N. '''{{w|Foucault's pendulum}}''' is a device conceived by French physicist '''{{w|Léon Foucault}}''', consisting of a pendulum that is free to rotate its plane of oscillation. When placed in a rotating '''{{w|Non-inertial reference frame}}''' such as the '''{{w|Earth}}''', that has an associated rotation period of 24 hours, the oscillation plane of Foucault's pendulum rotates at a rate determined by the Earth's period and the angle between the rotation axis of the frame of reference and the direction of its elongation in resting position, i.e. its latitude, with a period T = T🜨/sin(λ), being T🜨 Earth's period and λ the latitude of the pendulum. Historically, Léon Foucault performed this experiment in the city of Paris, most famously (although not for the first time, which happened at the '''{{w|Paris Observatory}}''') under the dome of the '''{{w|Panthéon}}''', to demonstrate Earth's rotation. At this latitude, Foucault's pendulum completes a full rotation every 31.8 hours.
|-
| 79 || Jun 26 || 8 milligenerations || 78.89 days || A generation is in general 22-33 years, with a reasonable mid-point of 27; and 8 x 0.001 (milli) x 365.2425 (accounting for leap years) x 27 ≈ 78.89 days
|-
| 78 || Jun 27 || 777,777 dog minutes || 77.16 days || A popular myth is that dogs age 7 times faster than humans, so 1 dog minute equals 1/7 human minutes.
|-
| 77 || Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads) || 77 days || 7!=7x6x5x4x3x2x1=5040 - The standard episode of ''Jeopardy'' is 22-26 minutes skipping ads - taking the lowest value you get 110880 minutes total, which is the exact value needed.
|-
| 76 || Jun 29 || 5,000 repeats of ''99 Bottles of Beer'' || 76.3889 days || Each verse of {{w|99 Bottles of Beer}} is "''N'' bottles of beer on the wall, ''N'' bottles of beer. Take one down, pass it around, ''N-1'' bottles of beer on the wall." The entire song contains 99 verses. Randall apparently sings this rather slowly at around 72 bpm, taking about 13 seconds per verse.
|-
| 75 || Jun 30 || 5 baker's fortnights (15 days) || 75 days || A {{w|baker's dozen}} is a dozen (12) plus 1 extra item. Randall has generalized this to adding 1 to any unit. A fortnight is 2 weeks, so a baker's fortnight is 15 days. 5x15 is 75 days.
|-
| 74 || Jul 1 || √2 dog years || 73.79 days || See day 78 (Jun 27)
|-
| 73 || Jul 2 || π millivics (1/1000th of Queen Victoria's reign) || 72.966631 days || {{w|Queen Victoria}} ruled between 20 June 1837 and 22 January 1901 (23,226 days).
|-
| 72 || Jul 3 || 42 drives from NYC to LA (Google Maps estimate) || 71.75 days || According to Google Maps, the drive from New York City to Los Angeles via I-80 W (2789 miles or 4489 km) takes 41 hours.
|-
| 71 || Jul 4 || 1,000 viewings of ''Groundhog Day''|| 70.14 days || Using {{w|Groundhog Day (film)|Groundhog Day's}} 101-minute run time.
|-
| 70 || Jul 5 || 100,000 minutes || 69.44 days ||
|-
| 69 || Jul 6 || 1/10th of Martian year || 68.70 Earth days || Martian sidereal and tropical years both round to 687.0 Earth days
|-
| 68 || Jul 7 || 1,234,567 sound-miles || 67.63 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 67.6349058 days.
|-
| 67 || Jul 8 || 2πe seconds || 66.7 days || 2^(π^e) = 5,766,073 seconds
|-
| 66 || Jul 9 || 216 beats (Swatch Internet Time) || 65.536 days || {{w|.beat}} is equal to 1/1000 day.
|-
| 65 || Jul 10 || 1,000 ISS orbits || 64.58 days || Each orbit of the ISS takes 90-93 minutes. Here a value of 93 minutes is used.
|-
| 64 || Jul 11 || Five hundred twenty five thousand (base seven) minutes|| 62.8833333333333 days || This refers to {{w|radix}}-7 arithmetic: 525,0007 minutes = 90,55210 minutes. Also references the opening and recurring line "Five hundred twenty five thousand six hundred minutes" from {{w|Seasons of Love}}, a song from the musical {{w|Rent (musical)|''Rent''}}, which is also referenced in [[1047: Approximations]]. "base seven" has the same rhythm as "six hundred".
|-
| 63 || Jul 12 || 1050 Planck times || 62.38 days || 10^50 x 5.39 x 10^-44 seconds
|-
| 62 || Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)|| 62.5 days || {{w|The Office (British TV series)|''The Office''}} was originally a {{w|BBC}} television show which had no commercial breaks, but Randall is obviously more familiar with the {{w|The_Office_(American_TV_series)|US version}}. This US "half-hour" comedy format contains 22.5 minutes of content (including the title sequence) and 7.5 minutes of ads. 
|-
| 61 || Jul 14 || Four score and seven kilominutes || 60.4166 days || 87 x 1000 minutes
|-
| 60 || Jul 15 || 2 lunar months || 59.06 days || There are a number of different ways to define the {{w|lunar month}}. The most common is the synodic month, because it relates to the phases of the moon, and it's approximately 29.53 days.
|-
| 59 || Jul 16 || Half a day on Venus || 58.375 days || A Venus synodic day is 116 days 18 hours.
|-
| 58 || Jul 17 || 5 megaseconds || 57.8704 days || 5,000,000 seconds
|-
| 57 || Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature) || 4681~4763 years × 10-6 || Randall is stating that "literature" was invented approximately 2700 BCE. This is consistent with the earliest surviving coherent Sumerian texts, but the earliest proto-writing likely developed at least 500 years earlier according to {{w|History of writing}}.
|-
| 56 || Jul 19 || 1,000 viewings of ''Run Lola Run'' || 55.556 days || Using {{w|Run Lola Run|the movie's}} run time of 80 minutes.
|-
| 55 || Jul 20 || One million sound-miles || 54.78 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 54.7843137 days.
|-
| 54 || Jul 21 || 30 Ionian months || 53.0741 days || Orbital period of Io around Jupiter is approximately 1.77 days.
|-
| 53 || Jul 22 || One dog year || 52.18 days || See day 78 (Jun 27)
|-
| 52 || Jul 23 || 60 viewings of ''Star Wars Episodes I-IX'' || 51.75 days || According to [https://dorksideoftheforce.com/2021/05/04/how-long-to-watch-every-star-wars-movie/ Fansided] the combined running times are 20 hours 42 minutes.
|-
| 51 || Jul 24 || 1/100,000,000,000th of the universe's age || 50.4035 days || The universe is estimated to be about 13.8 billion years old.
|-
| 50 || Jul 25 || 5 milli-generations || 49.3 days || See day 79 (Jun 26)
|-
| 49 || Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven'' || 48.61 days || {{w|Seven minutes in heaven}} is an Anglo-culture teenager game, occuring in several movies. 10,000 minutes in Heaven is almost a week of making out (or doing whatever in a broom closet), so this game is unlikely.
|-
| 48 || Jul 27 || φeπ minutes || 47.6164 days || 68,567.57 minutes
|-
| 47 || Jul 28 || 4 megaseconds || 46.2963 days || 4,000,000 seconds
|-
| 46 || Jul 29 || 216 minutes || 45.5111 days || 65,536 minutes
|-
| 45 || Jul 30 || eee seconds || 44.1467 days || 3,814,279.10 seconds
|-
| 44 || Jul 31 || π fortnights|| 43.98 days || 3.14159 x 14 days
|-
| 43 || Aug 1 || One devil's spacewalk (666 orbits of the ISS) || 43.01 days || See day 65 (Jul 10). 666 is the {{w|number of the beast}}.
|-
| 42 || Aug 2 || 1 kilowatt-hour per watt || 41.66 days || 1000 hours
|-
| 41 || Aug 3 || eπ Ionian months || 40.9390 days || Orbital period of Io around Jupiter is 1.769137786 days
|-
| 40 || Aug 4 || 30 rotations of Foucault's pendulum in Paris || 39.8357 days || Refer to Day 80 (Jun 25)
|-
| 39 || Aug 5 || e fortnights || 38.0559 days ||2.71828 x 14 days
|-
| 38 || Aug 6 || πe baker's days (25 hours) || 37.98 days || See day 75 (Jun 30)
|-
| 37 || Aug 7 || One deciyear || 36.52425 days || One tenth of one year
|-
| 36 || Aug 8 || 7! milliweeks || 35.28 days || 5040 × 0.001 weeks
|-
| 35 || Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music || 34.72 days || ''Think'' is the music played while the contestants try to answer the Final Jeopardy question; it is 30 seconds long.
|-
| 34 || Aug 10 || 1000 basketball games (game time) || 33.33 days || Uses the NBA game time of four 12-minute quarters, or 48 minutes
|-
| 33 || Aug 11 || 777 hours || 32.375 days ||
|-
| 32 || Aug 12 || One millilincoln (1/1000 of fourscore and seven years) || 31.78 days || {{w|Abraham Lincoln}}'s {{w|Gettysburg Address}} begins with the famous phrase "Four score and seven years ago". 1 score = twenty. 
|-
| 31 || Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads) || 31.25 days || Uses a television 'hour' containing 45 minutes of content and 15 minutes of ads
|-
| 30 || Aug 14 || All of ''Star Trek'', consecutively || ||
|-
| 29 || Aug 15 || 777,777 nanocenturies || 28.4077 days || 777,777 × 10-9 × 100 years
|-
| 28 || Aug 16 || One sidereal lunar month || 27.3 days || The time it takes moon to return to the same position relative to the fixed stars
|-
| 27 || Aug 17 || 6 dog months || 26.1 days || See day 78 (Jun 27)
|-
| 26 || Aug 18 || ππ kilominutes || 25.3209 days || 36,462.16 minutes
|-
| 25 || Aug 19 || 7 games of 7! minutes in Heaven || 24.5 days || 7 x 5040 (7 {{w|Factorial}}) minutes. See also day 49 (Jul 26).
|-
| 24 || Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy || 23.82 days || ''The Fellowship of the Ring'' extended version is 208 minutes, ''The Two Towers'' is 226 minutes, and ''The Return of the King'' is 252 minutes for its e.v., according to [https://fictionhorizon.com/how-long-are-all-the-lord-of-the-rings-and-the-hobbit-movies-combined/ FictionHorizon.com]
|-
| 23 || Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times || 22.21 days || See day 72 (Jul 3). This is for 6 round-trips and 1 one-way trip.
|-
| 22 || Aug 22 || ''It's a Small World'' sung at 1/10,000th speed || 21.18 days || {{w|It's a Small World}} is a song that was composed for the attraction of the same name at various {{w|Disney}} theme parks, and plays continuously at them in various languages.
|-
| 21 || Aug 23 || 500 hours || 20.83 days ||
|-
| 20 || Aug 24 || √2 fortnights || 19.8 days || 1.4142 × 14 days
|-
| 19 || Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles || 18.94 days || {{w|Vanessa Carlton}} is an American singer, and {{w|A Thousand Miles}} is her most successful song. Randall estimates her walking speed at about 2.2 miles/hour.
|-
| 18 || Aug 26 || 100,000 breaths || 15 seconds per breath for 17 days || Normal respiratory rate for adults is typically 12-20 breaths per minute, or abou 3-4 seconds each. Randall may be a practitioner of "slow breathing".
|-
| 17 || Aug 27 || √2 megaseconds || 16.37 days || 1.4142 × 1,000,000 seconds
|-
| 16 || Aug 28 || πππ πcoseconds || 15.5112 days || 1.3402 × 1018 picoseconds (i.e., 10-12 seconds), making a joke how the mathematical "pi" is written with the character "π"
|-
| 15 || Aug 29 || One baker's fortnight (15 days) || 15 days || See day 75 (Jun 30)
|-
| 14 || Aug 30 || One baker's dozen (13) baker's days (25 hours) || 13.5416 days || 325 hours; see day 75 (Jun 30)
|-
| 13 || Aug 31 || 300 hours || 12.5 days ||
|-
| 12 || Sep 1 || One million seconds || 11.57 days ||
|-
| 11 || Sep 2 || One nonstop bike ride from NYC to LA || 10.54 days || Google maps estimates the trip at 253 hours
|-
| 10 || Sep 3 || 1⁄1,000th of a generation || 9.86 days || See day 79 (Jun 26)
|-
| 9 || Sep 4 || 777,777 seconds || 9.002 days ||
|-
| 8 || Sep 5 || 100 viewings of ''Groundhog Day'' || 7.014 days || See Day 71 (Jul 4).
|-
| 7 || Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven) || 6.04 days || 8,700 minutes
|-
| 6 || Sep 7 || One pico-universe-lifetime || 5.04 days || See Day 51 (Jul 24)
|-
| 5 || Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks || 4.63 days || The chorus lasts about 8 seconds per 'person'
|-
| 4 || Sep 9 || One centiyear || 3.652425 days || 365.24 days * 1/100
|-
| 3 || Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times || 2.79 days || Based on a length of 4 minutes, 1 second
|-
| 2 || Sep 11 || ''Speed'' (1994) played at one frame per second || 1.933 days || {{w|Speed_(1994_film)}} has runtime of 116 minutes = 6,960 seconds = 167,040 film frames at standard frame rate of 24 frames/second
|-
| 1 || Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1) || 0.7639 days || Each iteration contains ''N'' verses. ''N + N-1 + N-2 ... + 1'' equals ''N * (N+1) / 2'', so 99 recursions = 4950 verses. Using the same 13-second (72 bpm) rate as Jun 29, this is close to 18 hours. Probably refers to Donald Knuth's article {{w|The Complexity of Songs}}.
|-
| 0 || Sep 13 || ''What If? 2'' release day || N/A ||
|}

The title text refers to the recursive time period on Sep 12. If you don't stop when you reach N=0 bottles, the repetition never ends, so that time interval becomes infinite. He likens it to {{w|The Song That Never Ends}}, another repetitive children's song, which is specifically intended to go on forever. The difference is that the Beer song has a natural stopping point at 0, while ''The Song That Never Ends'' is completely repetitive.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

Large heading: Countdown to ''What if? 2''

Subheading: (Preorder at [https://xkcd.com/whatif2 xkcd.com/whatif2] to get it at the end of the countdown)

Remainder of comic is a calendar with the date in one corner of each day's box.

{| class="wikitable"
|-
! Date !! Description
|-
| Jun 22 || πe millidecades
|-
| Jun 23 || 7 megaseconds
|-
| Jun 24 || e lunar months
|-
| Jun 25 || 60 rotations of Foucault's pendulum in Paris
|-
| Jun 26 || 8 milligenerations
|-
| Jun 27 || 777,777 dog minutes
|-
| Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads)
|-
| Jun 29 || 5,000 repeats of ''99 Bottles of Beer''
|-
| Jun 30 || 5 baker's fortnights (15 days)
|-
| Jul 1 || √2 dog years
|-
| Jul 2 || π millivics (1/1000th of Queen Victoria's reign)
|-
| Jul 3 || 42 drives from NYC to LA (Google Maps estimate)
|-
| Jul 4 || 1,000 viewings of ''Groundhog Day''
|-
| Jul 5 || 100,000 minutes
|-
| Jul 6 || 1/10th of Martian year
|-
| Jul 7 || 1,234,567 sound-miles
|-
| Jul 8 || 2πe seconds
|-
| Jul 9 || 216 beats (Swatch Internet Time)
|-
| Jul 10 || 1,000 ISS orbits
|-
| Jul 11 || Five hundred twenty five thousand (base seven) minutes (text preceded by several drawn musical notes)
|-
| Jul 12 || 1050 Planck times
|-
| Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)
|-
| Jul 14 || Four score and seven kilominutes
|-
| Jul 15 || 2 lunar months
|-
| Jul 16 || Half a day on Venus
|-
| Jul 17 || 5 megaseconds
|-
| Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature)
|-
| Jul 19 || 1,000 viewings of ''Run Lola Run''
|-
| Jul 20 || One million sound-miles
|-
| Jul 21 || 30 Ionian months
|-
| Jul 22 || One dog year
|-
| Jul 23 || 60 viewings of ''Star Wars Episodes I-IX''
|-
| Jul 24 || 1/100,000,000,000th of the universe's age
|-
| Jul 25 || 5 milli-generations
|-
| Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven''
|-
| Jul 27 || φeπ minutes
|-
| Jul 28 || 4 megaseconds
|-
| Jul 29 || 216 minutes
|-
| Jul 30 || eee seconds
|-
| Jul 31 || π fortnights
|-
| Aug 1 || one devil's spacewalk (666 orbits of the ISS)
|-
| Aug 2 || 1 kilowatt-hour per watt
|-
| Aug 3 || eπ Ionian months
|-
| Aug 4 || 30 rotations of Foucault's pendulum in Paris
|-
| Aug 5 || e fortnights
|-
| Aug 6 || πe baker's days (25 hours)
|-
| Aug 7 || one deciyear
|-
| Aug 8 || 7! milliweeks
|-
| Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music
|-
| Aug 10 || 1000 basketball games (game time)
|-
| Aug 11 || 777 hours
|-
| Aug 12 || one millilincoln (1/1000 of fourscore and seven years)
|-
| Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads)
|-
| Aug 14 || All of ''Star Trek'', consecutively
|-
| Aug 15 || 777,777 nanocenturies
|-
| Aug 16 || one sidereal lunar month
|-
| Aug 17 || 6 dog months
|-
| Aug 18 || ππ kilominutes
|-
| Aug 19 || 7 games of ''7! minutes in Heaven''
|-
| Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy
|-
| Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times
|-
| Aug 22 || ''It's a Small World'' sung at 1/10,000th speed
|-
| Aug 23 || 500 hours
|-
| Aug 24 || √2 fortnights
|-
| Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles
|-
| Aug 26 || 100,000 breaths
|-
| Aug 27 || √2 megaseconds
|-
| Aug 28 || πππ πcoseconds
|-
| Aug 29 || One baker's fortnight (15 days)
|-
| Aug 30 || One baker's dozen (13) baker's days (25 hours)
|-
| Aug 31 || 300 hours
|-
| Sep 1 || One million seconds
|-
| Sep 2 || One nonstop bike ride from NYC to LA
|-
| Sep 3 || 1⁄1,000th of a generation
|-
| Sep 4 || 777,777 seconds
|-
| Sep 5 || 100 viewings of ''Groundhog Day''
|-
| Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven)
|-
| Sep 7 || One pico-universe-lifetime
|-
| Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks
|-
| Sep 9 || One centiyear
|-
| Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times
|-
| Sep 11 || ''Speed'' (1994) played at one frame per second
|-
| Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1)
|-
| Sep 13 || ''What If? 2'' release day
|}
{{comic discussion}}
[[Category:Book promotion]]
[[Category:Comics featuring real people]]
[[Category:Songs]]
[[Category:Animals]]

2636: What If? 2 Countdown

2022-06-24T19:17:29Z

162.158.166.183: /* Explanation */ copyedit

{{comic
| number = 2636
| date = June 22, 2022
| title = What If? 2 Countdown
| image = what_if_2_countdown.png
| titletext = If you don't end the 99 Bottles of Beer recursion at N=0 it just becomes The Other Song That Never Ends.
}}

==Explanation==
{{incomplete|Created by FOUR SCORE AND 7 BOTTLES OF BEER ON THE WALL - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
This comic takes the idea of {{w|Advent calendar}}s, and takes it to the extreme. It uses rather absurd and/or obscure ways to measure the amount of time until [[Randall]]'s new book ''What if? 2'' is released, with esoteric units or esoteric numbers. And often both.

Some concepts that appear several times throughout the calendar are:

* '''{{w|SI prefixes}}''', which can be applied to the beginning of a unit's name to multiply or divide the unit by powers of 10 or 1,000. This is standard for units like meters and grams, but is rarely applied to measurements of time other than when a unit of less than one second is needed, most commonly in various fields of science and engineering such as physics and electronics.
* The '''{{w|Gettysburg Address}}''', a famous speech delivered by U.S. president Abraham Lincoln in 1863, where he began by referring to the signing of the Declaration of Independence taking place "four score and seven years ago". A score is a dated term for the number 20, so "four score and seven" is equivalent to 87.
* A '''dog year''' is traditionally considered to be one-seventh the length of a normal human year, since a dog's overall lifespan is roughly one-seventh of a typical human's. The comic applies this to other units of time, such as minutes and months, each of which is also one-seventh the length of the standard unit. The number 7 (traditionally a "lucky number") is also used in many of the numbers quoted in the calendar.
* Other comparative durations of time that are not normally or usefully applied to day-length multiples. At the top end, there is the age of the universe, at the other there is {{w|Planck_units#Planck_time|Planck-time}} – with entire durations of periods of human history and the time needed to watch popular TV/film franchises in-between – most of which require a non-trivial multiplier or divisor to bring them to the necessary scale required.
* A '''{{w|baker's dozen}}''' is 13, or one more than a normal dozen. Here, the "baker's" prefix can be applied to any unit by adding an extra one of its constituent parts, like an extra hour added to a day.
* '''{{w|Irrational numbers}}''' like {{w|pi}} (3.14159...), {{w|Euler's number}} or ''e'' (2.71828...), the {{w|golden ratio}} (1.61803...), and the {{w|square root of 2}} (1.41421...). These are all interesting numbers because of their mathematical properties, but very impractical to use as arbitrary measurements of time because they have an endless series of non-repeating decimal digits.
* The teenage dating game '''{{w|Seven minutes in heaven}}'''.
* Rotation and revolution periods of various planets and moons in the Solar System.

{| class="wikitable"
|-
! Days !! Date !! Units !! Exact value !! Explanation
|-
| 83 || Jun 22 || πe millidecades || 82.0304 days || π ≈ 3.14159, e ≈ 2.718, so πe is about 22.459. A millidecade is 1/1000 decade, or 1/100 year, or 3.652425 days. Multiplying these results in 82.03 days. This is a play on {{w|Euler's identity}}, eiπ=-1, but raising pi to the power of e instead.
|-
| 82 || Jun 23 || 7 megaseconds || 81.0185 days || 7,000,000 seconds
|-
| 81 || Jun 24 || e lunar months || 80.27247 days || A lunar month ≈ 29.53059 days, e ≈ 2.718
|-
| 80 || Jun 25 || 60 rotations of Foucault's pendulum in Paris || 79.67 days || '''{{w|Paris}}''' is the capital city of '''{{w|France}}''' and it's located at a latitude of 48º 51' 23" N. '''{{w|Foucault's pendulum}}''' is a device conceived by French physicist '''{{w|Léon Foucault}}''', consisting of a pendulum that is free to rotate its plane of oscillation. When placed in a rotating '''{{w|Non-inertial reference frame}}''' such as the '''{{w|Earth}}''', that has an associated rotation period of 24 hours, the oscillation plane of Foucault's pendulum rotates at a rate determined by the Earth's period and the angle between the rotation axis of the frame of reference and the direction of its elongation in resting position, i.e. its latitude, with a period T = T🜨/sin(λ), being T🜨 Earth's period and λ the latitude of the pendulum. Historically, Léon Foucault performed this experiment in the city of Paris, most famously (although not for the first time, which happened at the '''{{w|Paris Observatory}}''') under the dome of the '''{{w|Panthéon}}''', to demonstrate Earth's rotation. At this latitude, Foucault's pendulum completes a full rotation every 31.8 hours.
|-
| 79 || Jun 26 || 8 milligenerations || 78.89 days || A generation is in general 22-33 years, with a reasonable mid-point of 27; and 8 x 0.001 (milli) x 365.2425 (accounting for leap years) x 27 ≈ 78.89 days
|-
| 78 || Jun 27 || 777,777 dog minutes || 77.16 days || A popular myth is that dogs age 7 times faster than humans, so 1 dog minute equals 1/7 human minutes.
|-
| 77 || Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads) || 77 days || 7!=7x6x5x4x3x2x1=5040 - The standard episode of ''Jeopardy'' is 22-26 minutes skipping ads - taking the lowest value you get 110880 minutes total, which is the exact value needed.
|-
| 76 || Jun 29 || 5,000 repeats of ''99 Bottles of Beer'' || 76.3889 days || Each verse of {{w|99 Bottles of Beer}} is "''N'' bottles of beer on the wall, ''N'' bottles of beer. Take one down, pass it around, ''N-1'' bottles of beer on the wall." The entire song contains 99 verses. Randall apparently sings this rather slowly at around 72 bpm, taking about 13 seconds per verse.
|-
| 75 || Jun 30 || 5 baker's fortnights (15 days) || 75 days || A {{w|baker's dozen}} is a dozen (12) plus 1 extra item. Randall has generalized this to adding 1 to any unit. A fortnight is 2 weeks, so a baker's fortnight is 15 days. 5x15 is 75 days.
|-
| 74 || Jul 1 || √2 dog years || 73.79 days || See day 78 (Jun 27)
|-
| 73 || Jul 2 || π millivics (1/1000th of Queen Victoria's reign) || 72.966631 days || {{w|Queen Victoria}} ruled between 20 June 1837 and 22 January 1901 (23,226 days).
|-
| 72 || Jul 3 || 42 drives from NYC to LA (Google Maps estimate) || 71.75 days || According to Google Maps, the drive from New York City to Los Angeles via I-80 W (2789 miles or 4489 km) takes 41 hours.
|-
| 71 || Jul 4 || 1,000 viewings of ''Groundhog Day''|| 70.14 days || Using {{w|Groundhog Day (film)|Groundhog Day's}} 101-minute run time.
|-
| 70 || Jul 5 || 100,000 minutes || 69.44 days ||
|-
| 69 || Jul 6 || 1/10th of Martian year || 68.70 Earth days || Martian sidereal and tropical years both round to 687.0 Earth days
|-
| 68 || Jul 7 || 1,234,567 sound-miles || 67.63 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 67.6349058 days.
|-
| 67 || Jul 8 || 2πe seconds || 66.7 days || 2^(π^e) = 5,766,073 seconds
|-
| 66 || Jul 9 || 216 beats (Swatch Internet Time) || 65.536 days || {{w|.beat}} is equal to 1/1000 day.
|-
| 65 || Jul 10 || 1,000 ISS orbits || 64.58 days || Each orbit of the ISS takes 90-93 minutes. Here a value of 93 minutes is used.
|-
| 64 || Jul 11 || Five hundred twenty five thousand (base seven) minutes|| 62.8833333333333 days || This refers to {{w|radix}}-7 arithmetic: 525,0007 minutes = 90,55210 minutes. Also references the opening and recurring line "Five hundred twenty five thousand six hundred minutes" from {{w|Seasons of Love}}, a song from the musical {{w|Rent (musical)|''Rent''}}, which is also referenced in [[1047: Approximations]]. "base seven" has the same rhythm as "six hundred".
|-
| 63 || Jul 12 || 1050 Planck times || 62.38 days || 10^50 x 5.39 x 10^-44 seconds
|-
| 62 || Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)|| 62.5 days || {{w|The Office (British TV series)|''The Office''}} was originally a {{w|BBC}} television show which had no commercial breaks, but Randall is obviously more familiar with the {{w|The_Office_(American_TV_series)|US version}}. This US "half-hour" comedy format contains 22.5 minutes of content (including the title sequence) and 7.5 minutes of ads. 
|-
| 61 || Jul 14 || Four score and seven kilominutes || 60.4166 days || 87 x 1000 minutes
|-
| 60 || Jul 15 || 2 lunar months || 59.06 days || There are a number of different ways to define the {{w|lunar month}}. The most common is the synodic month, because it relates to the phases of the moon, and it's approximately 29.53 days.
|-
| 59 || Jul 16 || Half a day on Venus || 58.375 days || A Venus synodic day is 116 days 18 hours.
|-
| 58 || Jul 17 || 5 megaseconds || 57.8704 days || 5,000,000 seconds
|-
| 57 || Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature) || 4681~4763 years × 10-6 || Randall is stating that "literature" was invented approximately 2700 BCE. This is consistent with the earliest surviving coherent Sumerian texts, but the earliest proto-writing likely developed at least 500 years earlier according to {{w|History of writing}}.
|-
| 56 || Jul 19 || 1,000 viewings of ''Run Lola Run'' || 55.556 days || Using {{w|Run Lola Run|the movie's}} run time of 80 minutes.
|-
| 55 || Jul 20 || One million sound-miles || 54.78 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 54.7843137 days.
|-
| 54 || Jul 21 || 30 Ionian months || 53.0741 days || Orbital period of Io around Jupiter is approximately 1.77 days.
|-
| 53 || Jul 22 || One dog year || 52.18 days || See day 78 (Jun 27)
|-
| 52 || Jul 23 || 60 viewings of ''Star Wars Episodes I-IX'' || 51.75 days || According to [https://dorksideoftheforce.com/2021/05/04/how-long-to-watch-every-star-wars-movie/ Fansided] the combined running times are 20 hours 42 minutes.
|-
| 51 || Jul 24 || 1/100,000,000,000th of the universe's age || 50.4035 days || The universe is estimated to be about 13.8 billion years old.
|-
| 50 || Jul 25 || 5 milli-generations || 49.3 days || See day 79 (Jun 26)
|-
| 49 || Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven'' || 48.61 days || {{w|Seven minutes in heaven}} is an Anglo-culture teenager game, occuring in several movies. 10,000 minutes in Heaven is almost a week of making out (or doing whatever in a broom closet), so this game is unlikely.
|-
| 48 || Jul 27 || φeπ minutes || 47.6164 days || 68,567.57 minutes
|-
| 47 || Jul 28 || 4 megaseconds || 46.2963 days || 4,000,000 seconds
|-
| 46 || Jul 29 || 216 minutes || 45.5111 days || 65,536 minutes
|-
| 45 || Jul 30 || eee seconds || 44.1467 days || 3,814,279.10 seconds
|-
| 44 || Jul 31 || π fortnights|| 43.98 days || 3.14159 x 14 days
|-
| 43 || Aug 1 || One devil's spacewalk (666 orbits of the ISS) || 43.01 days || See day 65 (Jul 10). 666 is the {{w|number of the beast}}.
|-
| 42 || Aug 2 || 1 kilowatt-hour per watt || 41.66 days || 1000 hours
|-
| 41 || Aug 3 || eπ Ionian months || 40.9390 days || Orbital period of Io around Jupiter is 1.769137786 days
|-
| 40 || Aug 4 || 30 rotations of Foucault's pendulum in Paris || 39.8357 days || Refer to Day 80 (Jun 25)
|-
| 39 || Aug 5 || e fortnights || 38.0559 days ||2.71828 x 14 days
|-
| 38 || Aug 6 || πe baker's days (25 hours) || 37.98 days || See day 75 (Jun 30)
|-
| 37 || Aug 7 || One deciyear || 36.52425 days || One tenth of one year
|-
| 36 || Aug 8 || 7! milliweeks || 35.28 days || 5040 × 0.001 weeks
|-
| 35 || Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music || 34.72 days || ''Think'' is the music played while the contestants try to answer the Final Jeopardy question; it is 30 seconds long.
|-
| 34 || Aug 10 || 1000 basketball games (game time) || 33.33 days || Uses the NBA game time of four 12-minute quarters, or 48 minutes
|-
| 33 || Aug 11 || 777 hours || 32.375 days ||
|-
| 32 || Aug 12 || One millilincoln (1/1000 of fourscore and seven years) || 31.78 days || {{w|Abraham Lincoln}}'s {{w|Gettysburg Address}} begins with the famous phrase "Four score and seven years ago". 1 score = twenty. 
|-
| 31 || Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads) || 31.25 days || Uses a television 'hour' containing 45 minutes of content and 15 minutes of ads
|-
| 30 || Aug 14 || All of ''Star Trek'', consecutively || ||
|-
| 29 || Aug 15 || 777,777 nanocenturies || 28.4077 days || 777,777 × 10-9 × 100 years
|-
| 28 || Aug 16 || One sidereal lunar month || 27.3 days || The time it takes moon to return to the same position relative to the fixed stars
|-
| 27 || Aug 17 || 6 dog months || 26.1 days || See day 78 (Jun 27)
|-
| 26 || Aug 18 || ππ kilominutes || 25.3209 days || 36,462.16 minutes
|-
| 25 || Aug 19 || 7 games of 7! minutes in Heaven || 24.5 days || 7 x 5040 (7 {{w|Factorial}}) minutes. See also day 49 (Jul 26).
|-
| 24 || Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy || 23.82 days || ''The Fellowship of the Ring'' extended version is 208 minutes, ''The Two Towers'' is 226 minutes, and ''The Return of the King'' is 252 minutes for its e.v., according to [https://fictionhorizon.com/how-long-are-all-the-lord-of-the-rings-and-the-hobbit-movies-combined/ FictionHorizon.com]
|-
| 23 || Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times || 22.21 days || See day 72 (Jul 3). This is for 6 round-trips and 1 one-way trip.
|-
| 22 || Aug 22 || ''It's a Small World'' sung at 1/10,000th speed || 21.18 days || {{w|It's a Small World}} is a song that was composed for the attraction of the same name at various {{w|Disney}} theme parks, and plays continuously at them in various languages.
|-
| 21 || Aug 23 || 500 hours || 20.8333 days ||
|-
| 20 || Aug 24 || √2 fortnights || 19.7990 days || 1.4142 × 14 days
|-
| 19 || Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles || 18.94 days || {{w|Vanessa Carlton}} is an American singer, and {{w|A Thousand Miles}} is her most successful song. Randall estimates her walking speed at about 2.2 miles/hour.
|-
| 18 || Aug 26 || 100,000 breaths || .26 min/breath || Normal respiratory rate for adults is typically 12-20 breaths per minute. Randall may have a health problem or be a practitioner of "slow breathing".
|-
| 17 || Aug 27 || √2 megaseconds || 16.3682 days || 1.4142 × 1,000,000 seconds
|-
| 16 || Aug 28 || πππ πcoseconds || 15.5112 days || 1.3402 × 1018 picoseconds (i.e., 10-12 seconds), making a joke how the mathematical "pi" is written with the character "π"
|-
| 15 || Aug 29 || One baker's fortnight (15 days) || 15 days || See day 75 (Jun 30)
|-
| 14 || Aug 30 || One baker's dozen (13) baker's days (25 hours) || 13.5416 days || 325 hours; see day 75 (Jun 30)
|-
| 13 || Aug 31 || 300 hours || 12.5 days ||
|-
| 12 || Sep 1 || One million seconds || 11.57 days ||
|-
| 11 || Sep 2 || One nonstop bike ride from NYC to LA || 10.54 days || Google maps estimates the trip at 253 hours
|-
| 10 || Sep 3 || 1⁄1,000th of a generation || 9.86 days || See day 79 (Jun 26)
|-
| 9 || Sep 4 || 777,777 seconds || 9.002 days ||
|-
| 8 || Sep 5 || 100 viewings of ''Groundhog Day'' || 7.014 days || See Day 71 (Jul 4).
|-
| 7 || Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven) || 6.04 days || 8,700 minutes
|-
| 6 || Sep 7 || One pico-universe-lifetime || 5.04 days || See Day 51 (Jul 24)
|-
| 5 || Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks || 4.63 days || The chorus lasts about 8 seconds per 'person'
|-
| 4 || Sep 9 || One centiyear || 3.652425 days || 365.24 days * 1/100
|-
| 3 || Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times || 2.79 days || Based on a length of 4 minutes, 1 second
|-
| 2 || Sep 11 || ''Speed'' (1994) played at one frame per second || 1.933 days || {{w|Speed_(1994_film)}} has runtime of 116 minutes = 6,960 seconds = 167,040 film frames at standard frame rate of 24 frames/second
|-
| 1 || Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1) || 0.7639 days || Each iteration contains ''N'' verses. ''N + N-1 + N-2 ... + 1'' equals ''N * (N+1) / 2'', so 99 recursions = 4950 verses. Using the same 13-second (72 bpm) rate as Jun 29, this is close to 18 hours. Probably refers to Donald Knuth's article {{w|The Complexity of Songs}}.
|-
| 0 || Sep 13 || ''What If? 2'' release day || N/A ||
|}

The title text refers to the recursive time period on Sep 12. If you don't stop when you reach N=0 bottles, the repetition never ends, so that time interval becomes infinite. He likens it to {{w|The Song That Never Ends}}, another repetitive children's song, which is specifically intended to go on forever. The difference is that the Beer song has a natural stopping point at 0, while ''The Song That Never Ends'' is completely repetitive.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

Large heading: Countdown to ''What if? 2''

Subheading: (Preorder at [https://xkcd.com/whatif2 xkcd.com/whatif2] to get it at the end of the countdown)

Remainder of comic is a calendar with the date in one corner of each day's box.

{| class="wikitable"
|-
! Date !! Description
|-
| Jun 22 || πe millidecades
|-
| Jun 23 || 7 megaseconds
|-
| Jun 24 || e lunar months
|-
| Jun 25 || 60 rotations of Foucault's pendulum in Paris
|-
| Jun 26 || 8 milligenerations
|-
| Jun 27 || 777,777 dog minutes
|-
| Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads)
|-
| Jun 29 || 5,000 repeats of ''99 Bottles of Beer''
|-
| Jun 30 || 5 baker's fortnights (15 days)
|-
| Jul 1 || √2 dog years
|-
| Jul 2 || π millivics (1/1000th of Queen Victoria's reign)
|-
| Jul 3 || 42 drives from NYC to LA (Google Maps estimate)
|-
| Jul 4 || 1,000 viewings of ''Groundhog Day''
|-
| Jul 5 || 100,000 minutes
|-
| Jul 6 || 1/10th of Martian year
|-
| Jul 7 || 1,234,567 sound-miles
|-
| Jul 8 || 2πe seconds
|-
| Jul 9 || 216 beats (Swatch Internet Time)
|-
| Jul 10 || 1,000 ISS orbits
|-
| Jul 11 || Five hundred twenty five thousand (base seven) minutes (text preceded by several drawn musical notes)
|-
| Jul 12 || 1050 Planck times
|-
| Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)
|-
| Jul 14 || Four score and seven kilominutes
|-
| Jul 15 || 2 lunar months
|-
| Jul 16 || Half a day on Venus
|-
| Jul 17 || 5 megaseconds
|-
| Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature)
|-
| Jul 19 || 1,000 viewings of ''Run Lola Run''
|-
| Jul 20 || One million sound-miles
|-
| Jul 21 || 30 Ionian months
|-
| Jul 22 || One dog year
|-
| Jul 23 || 60 viewings of ''Star Wars Episodes I-IX''
|-
| Jul 24 || 1/100,000,000,000th of the universe's age
|-
| Jul 25 || 5 milli-generations
|-
| Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven''
|-
| Jul 27 || φeπ minutes
|-
| Jul 28 || 4 megaseconds
|-
| Jul 29 || 216 minutes
|-
| Jul 30 || eee seconds
|-
| Jul 31 || π fortnights
|-
| Aug 1 || one devil's spacewalk (666 orbits of the ISS)
|-
| Aug 2 || 1 kilowatt-hour per watt
|-
| Aug 3 || eπ Ionian months
|-
| Aug 4 || 30 rotations of Foucault's pendulum in Paris
|-
| Aug 5 || e fortnights
|-
| Aug 6 || πe baker's days (25 hours)
|-
| Aug 7 || one deciyear
|-
| Aug 8 || 7! milliweeks
|-
| Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music
|-
| Aug 10 || 1000 basketball games (game time)
|-
| Aug 11 || 777 hours
|-
| Aug 12 || one millilincoln (1/1000 of fourscore and seven years)
|-
| Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads)
|-
| Aug 14 || All of ''Star Trek'', consecutively
|-
| Aug 15 || 777,777 nanocenturies
|-
| Aug 16 || one sidereal lunar month
|-
| Aug 17 || 6 dog months
|-
| Aug 18 || ππ kilominutes
|-
| Aug 19 || 7 games of ''7! minutes in Heaven''
|-
| Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy
|-
| Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times
|-
| Aug 22 || ''It's a Small World'' sung at 1/10,000th speed
|-
| Aug 23 || 500 hours
|-
| Aug 24 || √2 fortnights
|-
| Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles
|-
| Aug 26 || 100,000 breaths
|-
| Aug 27 || √2 megaseconds
|-
| Aug 28 || πππ πcoseconds
|-
| Aug 29 || One baker's fortnight (15 days)
|-
| Aug 30 || One baker's dozen (13) baker's days (25 hours)
|-
| Aug 31 || 300 hours
|-
| Sep 1 || One million seconds
|-
| Sep 2 || One nonstop bike ride from NYC to LA
|-
| Sep 3 || 1⁄1,000th of a generation
|-
| Sep 4 || 777,777 seconds
|-
| Sep 5 || 100 viewings of ''Groundhog Day''
|-
| Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven)
|-
| Sep 7 || One pico-universe-lifetime
|-
| Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks
|-
| Sep 9 || One centiyear
|-
| Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times
|-
| Sep 11 || ''Speed'' (1994) played at one frame per second
|-
| Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1)
|-
| Sep 13 || ''What If? 2'' release day
|}
{{comic discussion}}
[[Category:Book promotion]]
[[Category:Comics featuring real people]]
[[Category:Songs]]
[[Category:Animals]]

2636: What If? 2 Countdown

2022-06-24T19:15:10Z

162.158.166.183: /* Explanation */ I guess we aren't using unannotated number extlinks

{{comic
| number = 2636
| date = June 22, 2022
| title = What If? 2 Countdown
| image = what_if_2_countdown.png
| titletext = If you don't end the 99 Bottles of Beer recursion at N=0 it just becomes The Other Song That Never Ends.
}}

==Explanation==
{{incomplete|Created by FOUR SCORE AND 7 BOTTLES OF BEER ON THE WALL - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
This comic takes the idea of {{w|Advent calendar}}s, and takes it to the extreme. It uses rather absurd and/or obscure ways to measure the amount of time until [[Randall]]'s new book ''What if? 2'' is released, with esoteric units or esoteric numbers. And often both.

Some concepts that appear several times throughout the calendar are:

* '''{{w|SI prefixes}}''', which can be applied to the beginning of a unit's name to multiply or divide the unit by powers of 10 or 1,000. This is standard for units like meters and grams, but is rarely applied to measurements of time other than when a unit of less than one second is needed, most commonly in various fields of science and engineering such as physics and electronics.
* The '''{{w|Gettysburg Address}}''', a famous speech delivered by U.S. president Abraham Lincoln in 1863, where he began by referring to the signing of the Declaration of Independence taking place "four score and seven years ago". A score is a dated term for the number 20, so "four score and seven" is equivalent to 87.
* A '''dog year''' is traditionally considered to be one-seventh the length of a normal human year, since a dog's overall lifespan is roughly one-seventh of a typical human's. The comic applies this to other units of time, such as minutes and months, each of which is also one-seventh the length of the standard unit. The number 7 (traditionally a "lucky number") is also used in many of the numbers quoted in the calendar.
* Other comparative durations of time that are not normally or usefully applied to day-length multiples. At the top end, there is the age of the universe, at the other there is {{w|Planck_units#Planck_time|Planck-time}} – with entire durations of periods of human history and the time needed to watch popular TV/film franchises in-between – most of which require a non-trivial multiplier or divisor to bring them to the necessary scale required.
* A '''{{w|baker's dozen}}''' is 13, or one more than a normal dozen. Here, the "baker's" prefix can be applied to any unit by adding an extra one of its constituent parts, like an extra hour added to a day.
* '''{{w|Irrational numbers}}''' like {{w|pi}} (3.14159...), {{w|Euler's number}} or ''e'' (2.71828...), the {{w|golden ratio}} (1.61803...), and the {{w|square root of 2}} (1.41421...). These are all interesting numbers because of their mathematical properties, but very impractical to use as arbitrary measurements of time because they have an endless series of non-repeating decimal digits.
* The teenage dating game '''{{w|Seven minutes in heaven}}'''.
* Rotation and revolution periods of various planets and moons in the Solar System.

{| class="wikitable"
|-
! Days !! Date !! Units !! Exact value !! Explanation
|-
| 83 || Jun 22 || πe millidecades || 82.0304 days || π ≈ 3.14159, e ≈ 2.718, so πe is about 22.459. A millidecade is 1/1000 decade, or 1/100 year, or 3.652425 days. Multiplying these results in 82.03 days. This is a play on {{w|Euler's identity}}, eiπ=-1, but raising pi to the power of e instead.
|-
| 82 || Jun 23 || 7 megaseconds || 81.0185 days || 7,000,000 seconds
|-
| 81 || Jun 24 || e lunar months || 80.27247 days || A lunar month ≈ 29.53059 days, e ≈ 2.718
|-
| 80 || Jun 25 || 60 rotations of Foucault's pendulum in Paris || 79.67 days || '''{{w|Paris}}''' is the capital city of '''{{w|France}}''' and it's located at a latitude of 48º 51' 23" N. '''{{w|Foucault's pendulum}}''' is a device conceived by French physicist '''{{w|Léon Foucault}}''', consisting of a pendulum that is free to rotate its plane of oscillation. When placed in a rotating '''{{w|Non-inertial reference frame}}''' such as the '''{{w|Earth}}''', that has an associated rotation period of 24 hours, the oscillation plane of Foucault's pendulum rotates at a rate determined by the Earth's period and the angle between the rotation axis of the frame of reference and the direction of its elongation in resting position, i.e. its latitude, with a period T = T🜨/sin(λ), being T🜨 Earth's period and λ the latitude of the pendulum. Historically, Léon Foucault performed this experiment in the city of Paris, most famously (although not for the first time, which happened at the '''{{w|Paris Observatory}}''') under the dome of the '''{{w|Panthéon}}''', to demonstrate Earth's rotation. At this latitude, Foucault's pendulum completes a full rotation every 31.8 hours.
|-
| 79 || Jun 26 || 8 milligenerations || 78.89 days || A generation is in general 22-33 years, with a reasonable mid-point of 27; and 8 x 0.001 (milli) x 365.2425 (accounting for leap years) x 27 ≈ 78.89 days
|-
| 78 || Jun 27 || 777,777 dog minutes || 77.16 days || A popular myth is that dogs age 7 times faster than humans, so 1 dog minute equals 1/7 human minutes.
|-
| 77 || Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads) || 77 days || 7!=7x6x5x4x3x2x1=5040 - The standard episode of ''Jeopardy'' is 22-26 minutes skipping ads - taking the lowest value you get 110880 minutes total, which is the exact value needed.
|-
| 76 || Jun 29 || 5,000 repeats of ''99 Bottles of Beer'' || 76.3889 days || Each verse of {{w|99 Bottles of Beer}} is "''N'' bottles of beer on the wall, ''N'' bottles of beer. Take one down, pass it around, ''N-1'' bottles of beer on the wall." The entire song contains 99 verses. Randall apparently sings this rather slowly at around 72 bpm, taking about 13 seconds per verse.
|-
| 75 || Jun 30 || 5 baker's fortnights (15 days) || 75 days || A {{w|baker's dozen}} is a dozen (12) plus 1 extra item. Randall has generalized this to adding 1 to any unit. A fortnight is 2 weeks, so a baker's fortnight is 15 days. 5x15 is 75 days.
|-
| 74 || Jul 1 || √2 dog years || 73.79 days || See day 78 (Jun 27)
|-
| 73 || Jul 2 || π millivics (1/1000th of Queen Victoria's reign) || 72.966631 days || {{w|Queen Victoria}} ruled between 20 June 1837 and 22 January 1901 (23,226 days).
|-
| 72 || Jul 3 || 42 drives from NYC to LA (Google Maps estimate) || 71.75 days || According to Google Maps, the drive from New York City to Los Angeles via I-80 W (2789 miles or 4489 km) takes 41 hours.
|-
| 71 || Jul 4 || 1,000 viewings of ''Groundhog Day''|| 70.14 days || Using {{w|Groundhog Day (film)|Groundhog Day's}} 101-minute run time.
|-
| 70 || Jul 5 || 100,000 minutes || 69.44 days ||
|-
| 69 || Jul 6 || 1/10th of Martian year || 68.70 Earth days || Martian sidereal and tropical years both round to 687.0 Earth days
|-
| 68 || Jul 7 || 1,234,567 sound-miles || 67.63 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 67.6349058 days.
|-
| 67 || Jul 8 || 2πe seconds || 66.7 days || 2^(π^e) = 5,766,073 seconds
|-
| 66 || Jul 9 || 216 beats (Swatch Internet Time) || 65.536 days || {{w|.beat}} is equal to 1/1000 day.
|-
| 65 || Jul 10 || 1,000 ISS orbits || 64.58 days || Each orbit of the ISS takes 90-93 minutes. Here a value of 93 minutes is used.
|-
| 64 || Jul 11 || Five hundred twenty five thousand (base seven) minutes|| 62.8833333333333 days || This refers to {{w|radix}}-7 arithmetic: 525,0007 minutes = 90,55210 minutes. Also references the opening and recurring line "Five hundred twenty five thousand six hundred minutes" from {{w|Seasons of Love}}, a song from the musical {{w|Rent (musical)|''Rent''}}, which is also referenced in [[1047: Approximations]]. "base seven" has the same rhythm as "six hundred".
|-
| 63 || Jul 12 || 1050 Planck times || 62.38 days || 10^50 x 5.39 x 10^-44 seconds
|-
| 62 || Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)|| 62.5 days || {{w|The Office (British TV series)|''The Office''}} was originally a {{w|BBC}} television show which had no commercial breaks, but Randall is obviously more familiar with the {{w|The_Office_(American_TV_series)|US version}}. This US "half-hour" comedy format contains 22.5 minutes of content (including the title sequence) and 7.5 minutes of ads. 
|-
| 61 || Jul 14 || Four score and seven kilominutes || 60.4166 days || 87 x 1000 minutes
|-
| 60 || Jul 15 || 2 lunar months || 59.06 days || There are a number of different ways to define the {{w|lunar month}}. The most common is the synodic month, because it relates to the phases of the moon, and it's approximately 29.53 days.
|-
| 59 || Jul 16 || Half a day on Venus || 58.375 days || A Venus synodic day is 116 days 18 hours.
|-
| 58 || Jul 17 || 5 megaseconds || 57.8704 days || 5,000,000 seconds
|-
| 57 || Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature) || 4681~4763 years × 10-6 || Randall is stating that "literature" was invented approximately 2700 BCE. This is consistent with the earliest surviving coherent Sumerian texts, but the earliest proto-writing likely developed at least 500 years earlier according to {{w|History of writing}}.
|-
| 56 || Jul 19 || 1,000 viewings of ''Run Lola Run'' || 55.556 days || Using {{w|Run Lola Run|the movie's}} run time of 80 minutes.
|-
| 55 || Jul 20 || One million sound-miles || 54.78 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 54.7843137 days.
|-
| 54 || Jul 21 || 30 Ionian months || 53.0741 days || Orbital period of Io around Jupiter is approximately 1.77 days.
|-
| 53 || Jul 22 || One dog year || 52.18 days || See day 78 (Jun 27)
|-
| 52 || Jul 23 || 60 viewings of ''Star Wars Episodes I-IX'' || 51.75 days || According to [https://dorksideoftheforce.com/2021/05/04/how-long-to-watch-every-star-wars-movie/ Fansided] the combined running times are 20 hours 42 minutes.
|-
| 51 || Jul 24 || 1/100,000,000,000th of the universe's age || 50.4035 days || The universe is estimated to be about 13.8 billion years old.
|-
| 50 || Jul 25 || 5 milli-generations || 49.3 days || See day 79 (Jun 26)
|-
| 49 || Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven'' || 48.61 days || {{w|Seven minutes in heaven}} is an Anglo-culture teenager game, occuring in several movies. 10,000 minutes in Heaven is almost a week of making out (or doing whatever in a broom closet), so this game is unlikely.
|-
| 48 || Jul 27 || φeπ minutes || 47.6164 days || 68,567.57 minutes
|-
| 47 || Jul 28 || 4 megaseconds || 46.2963 days || 4,000,000 seconds
|-
| 46 || Jul 29 || 216 minutes || 45.5111 days || 65,536 minutes
|-
| 45 || Jul 30 || eee seconds || 44.1467 days || 3,814,279.10 seconds
|-
| 44 || Jul 31 || π fortnights|| 43.98 days || 3.14159 x 14 days
|-
| 43 || Aug 1 || One devil's spacewalk (666 orbits of the ISS) || 43.01 days || See day 65 (Jul 10). 666 is the {{w|number of the beast}}.
|-
| 42 || Aug 2 || 1 kilowatt-hour per watt || 41.66 days || 1000 hours
|-
| 41 || Aug 3 || eπ Ionian months || 40.9390 days || Orbital period of Io around Jupiter is 1.769137786 days
|-
| 40 || Aug 4 || 30 rotations of Foucault's pendulum in Paris || 39.8357 days || Refer to Day 80 (Jun 25)
|-
| 39 || Aug 5 || e fortnights || 38.0559 days ||2.71828 x 14 days
|-
| 38 || Aug 6 || πe baker's days (25 hours) || 37.98 days || See day 75 (Jun 30)
|-
| 37 || Aug 7 || One deciyear || 36.52425 days || One tenth of one year
|-
| 36 || Aug 8 || 7! milliweeks || 35.28 days || 5040 × 0.001 weeks
|-
| 35 || Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music || 34.72 days || ''Think'' is the music played while the contestants try to answer the Final Jeopardy question; it is 30 seconds long.
|-
| 34 || Aug 10 || 1000 basketball games (game time) || 33.33 days || Uses the NBA game time of four 12-minute quarters, or 48 minutes
|-
| 33 || Aug 11 || 777 hours || 32.375 days ||
|-
| 32 || Aug 12 || One millilincoln (1/1000 of fourscore and seven years) || 31.78 days || {{w|Abraham Lincoln}}'s {{w|Gettysburg Address}} begins with the famous phrase "Four score and seven years ago". 1 score = twenty. 
|-
| 31 || Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads) || 31.25 days || Uses a television 'hour' containing 45 minutes of content and 15 minutes of ads
|-
| 30 || Aug 14 || All of ''Star Trek'', consecutively || ||
|-
| 29 || Aug 15 || 777,777 nanocenturies || 28.4077 days || 777,777 × 10-9 × 100 years
|-
| 28 || Aug 16 || One sidereal lunar month || 27.3 days || The time it takes moon to return to the same position relative to the fixed stars
|-
| 27 || Aug 17 || 6 dog months || 26.1 days || See day 78 (Jun 27)
|-
| 26 || Aug 18 || ππ kilominutes || 25.3209 days || 36,462.16 minutes
|-
| 25 || Aug 19 || 7 games of 7! minutes in Heaven || 24.5 days || 7 x 5040 (7 {{w|Factorial}}) minutes. See also day 49 (Jul 26).
|-
| 24 || Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy || 23.82 days || ''The Fellowship of the Ring'' extended version is 208 minutes, ''The Two Towers'' is 226 minutes, and ''The Return of the King'' is 252 minutes for its E.V., according to [https://fictionhorizon.com/how-long-are-all-the-lord-of-the-rings-and-the-hobbit-movies-combined/ FictionHorrizon.com]
|-
| 23 || Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times || 22.21 days || See day 72 (Jul 3). This is for 6 round-trips and 1 one-way trip.
|-
| 22 || Aug 22 || ''It's a Small World'' sung at 1/10,000th speed || 21.18 days || {{w|It's a Small World}} is a song that was composed for the attraction of the same name at various {{w|Disney}} theme parks, and plays continuously at them in various languages.
|-
| 21 || Aug 23 || 500 hours || 20.8333 days ||
|-
| 20 || Aug 24 || √2 fortnights || 19.7990 days || 1.4142 × 14 days
|-
| 19 || Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles || 18.94 days || {{w|Vanessa Carlton}} is an American singer, and {{w|A Thousand Miles}} is her most successful song. Randall estimates her walking speed at about 2.2 miles/hour.
|-
| 18 || Aug 26 || 100,000 breaths || .26 min/breath || Normal respiratory rate for adults is typically 12-20 breaths per minute. Randall may have a health problem or be a practitioner of "slow breathing".
|-
| 17 || Aug 27 || √2 megaseconds || 16.3682 days || 1.4142 × 1,000,000 seconds
|-
| 16 || Aug 28 || πππ πcoseconds || 15.5112 days || 1.3402 × 1018 picoseconds (i.e., 10-12 seconds), making a joke how the mathematical "pi" is written with the character "π"
|-
| 15 || Aug 29 || One baker's fortnight (15 days) || 15 days || See day 75 (Jun 30)
|-
| 14 || Aug 30 || One baker's dozen (13) baker's days (25 hours) || 13.5416 days || 325 hours; see day 75 (Jun 30)
|-
| 13 || Aug 31 || 300 hours || 12.5 days ||
|-
| 12 || Sep 1 || One million seconds || 11.57 days ||
|-
| 11 || Sep 2 || One nonstop bike ride from NYC to LA || 10.54 days || Google maps estimates the trip at 253 hours
|-
| 10 || Sep 3 || 1⁄1,000th of a generation || 9.86 days || See day 79 (Jun 26)
|-
| 9 || Sep 4 || 777,777 seconds || 9.002 days ||
|-
| 8 || Sep 5 || 100 viewings of ''Groundhog Day'' || 7.014 days || See Day 71 (Jul 4).
|-
| 7 || Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven) || 6.04 days || 8,700 minutes
|-
| 6 || Sep 7 || One pico-universe-lifetime || 5.04 days || See Day 51 (Jul 24)
|-
| 5 || Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks || 4.63 days || The chorus lasts about 8 seconds per 'person'
|-
| 4 || Sep 9 || One centiyear || 3.652425 days || 365.24 days * 1/100
|-
| 3 || Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times || 2.79 days || Based on a length of 4 minutes, 1 second
|-
| 2 || Sep 11 || ''Speed'' (1994) played at one frame per second || 1.933 days || {{w|Speed_(1994_film)}} has runtime of 116 minutes = 6,960 seconds = 167,040 film frames at standard frame rate of 24 frames/second
|-
| 1 || Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1) || 0.7639 days || Each iteration contains ''N'' verses. ''N + N-1 + N-2 ... + 1'' equals ''N * (N+1) / 2'', so 99 recursions = 4950 verses. Using the same 13-second (72 bpm) rate as Jun 29, this is close to 18 hours. Probably refers to Donald Knuth's article {{w|The Complexity of Songs}}.
|-
| 0 || Sep 13 || ''What If? 2'' release day || ||
|}

The title text refers to the recursive time period on Sep 12. If you don't stop when you reach N=0 bottles, the repetition never ends, so that time interval becomes infinite. He likens it to {{w|The Song That Never Ends}}, another repetitive children's song, which is specifically intended to go on forever. The difference is that the Beer song has a natural stopping point at 0, while ''The Song That Never Ends'' is completely repetitive.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

Large heading: Countdown to ''What if? 2''

Subheading: (Preorder at [https://xkcd.com/whatif2 xkcd.com/whatif2] to get it at the end of the countdown)

Remainder of comic is a calendar with the date in one corner of each day's box.

{| class="wikitable"
|-
! Date !! Description
|-
| Jun 22 || πe millidecades
|-
| Jun 23 || 7 megaseconds
|-
| Jun 24 || e lunar months
|-
| Jun 25 || 60 rotations of Foucault's pendulum in Paris
|-
| Jun 26 || 8 milligenerations
|-
| Jun 27 || 777,777 dog minutes
|-
| Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads)
|-
| Jun 29 || 5,000 repeats of ''99 Bottles of Beer''
|-
| Jun 30 || 5 baker's fortnights (15 days)
|-
| Jul 1 || √2 dog years
|-
| Jul 2 || π millivics (1/1000th of Queen Victoria's reign)
|-
| Jul 3 || 42 drives from NYC to LA (Google Maps estimate)
|-
| Jul 4 || 1,000 viewings of ''Groundhog Day''
|-
| Jul 5 || 100,000 minutes
|-
| Jul 6 || 1/10th of Martian year
|-
| Jul 7 || 1,234,567 sound-miles
|-
| Jul 8 || 2πe seconds
|-
| Jul 9 || 216 beats (Swatch Internet Time)
|-
| Jul 10 || 1,000 ISS orbits
|-
| Jul 11 || Five hundred twenty five thousand (base seven) minutes (text preceded by several drawn musical notes)
|-
| Jul 12 || 1050 Planck times
|-
| Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)
|-
| Jul 14 || Four score and seven kilominutes
|-
| Jul 15 || 2 lunar months
|-
| Jul 16 || Half a day on Venus
|-
| Jul 17 || 5 megaseconds
|-
| Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature)
|-
| Jul 19 || 1,000 viewings of ''Run Lola Run''
|-
| Jul 20 || One million sound-miles
|-
| Jul 21 || 30 Ionian months
|-
| Jul 22 || One dog year
|-
| Jul 23 || 60 viewings of ''Star Wars Episodes I-IX''
|-
| Jul 24 || 1/100,000,000,000th of the universe's age
|-
| Jul 25 || 5 milli-generations
|-
| Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven''
|-
| Jul 27 || φeπ minutes
|-
| Jul 28 || 4 megaseconds
|-
| Jul 29 || 216 minutes
|-
| Jul 30 || eee seconds
|-
| Jul 31 || π fortnights
|-
| Aug 1 || one devil's spacewalk (666 orbits of the ISS)
|-
| Aug 2 || 1 kilowatt-hour per watt
|-
| Aug 3 || eπ Ionian months
|-
| Aug 4 || 30 rotations of Foucault's pendulum in Paris
|-
| Aug 5 || e fortnights
|-
| Aug 6 || πe baker's days (25 hours)
|-
| Aug 7 || one deciyear
|-
| Aug 8 || 7! milliweeks
|-
| Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music
|-
| Aug 10 || 1000 basketball games (game time)
|-
| Aug 11 || 777 hours
|-
| Aug 12 || one millilincoln (1/1000 of fourscore and seven years)
|-
| Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads)
|-
| Aug 14 || All of ''Star Trek'', consecutively
|-
| Aug 15 || 777,777 nanocenturies
|-
| Aug 16 || one sidereal lunar month
|-
| Aug 17 || 6 dog months
|-
| Aug 18 || ππ kilominutes
|-
| Aug 19 || 7 games of ''7! minutes in Heaven''
|-
| Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy
|-
| Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times
|-
| Aug 22 || ''It's a Small World'' sung at 1/10,000th speed
|-
| Aug 23 || 500 hours
|-
| Aug 24 || √2 fortnights
|-
| Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles
|-
| Aug 26 || 100,000 breaths
|-
| Aug 27 || √2 megaseconds
|-
| Aug 28 || πππ πcoseconds
|-
| Aug 29 || One baker's fortnight (15 days)
|-
| Aug 30 || One baker's dozen (13) baker's days (25 hours)
|-
| Aug 31 || 300 hours
|-
| Sep 1 || One million seconds
|-
| Sep 2 || One nonstop bike ride from NYC to LA
|-
| Sep 3 || 1⁄1,000th of a generation
|-
| Sep 4 || 777,777 seconds
|-
| Sep 5 || 100 viewings of ''Groundhog Day''
|-
| Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven)
|-
| Sep 7 || One pico-universe-lifetime
|-
| Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks
|-
| Sep 9 || One centiyear
|-
| Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times
|-
| Sep 11 || ''Speed'' (1994) played at one frame per second
|-
| Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1)
|-
| Sep 13 || ''What If? 2'' release day
|}
{{comic discussion}}
[[Category:Book promotion]]
[[Category:Comics featuring real people]]
[[Category:Songs]]
[[Category:Animals]]

2636: What If? 2 Countdown

2022-06-24T19:12:22Z

162.158.166.183: /* Explanation */ extended ''Lord of the Rings'' trilogy

{{comic
| number = 2636
| date = June 22, 2022
| title = What If? 2 Countdown
| image = what_if_2_countdown.png
| titletext = If you don't end the 99 Bottles of Beer recursion at N=0 it just becomes The Other Song That Never Ends.
}}

==Explanation==
{{incomplete|Created by FOUR SCORE AND 7 BOTTLES OF BEER ON THE WALL - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
This comic takes the idea of {{w|Advent calendar}}s, and takes it to the extreme. It uses rather absurd and/or obscure ways to measure the amount of time until [[Randall]]'s new book ''What if? 2'' is released, with esoteric units or esoteric numbers. And often both.

Some concepts that appear several times throughout the calendar are:

* '''{{w|SI prefixes}}''', which can be applied to the beginning of a unit's name to multiply or divide the unit by powers of 10 or 1,000. This is standard for units like meters and grams, but is rarely applied to measurements of time other than when a unit of less than one second is needed, most commonly in various fields of science and engineering such as physics and electronics.
* The '''{{w|Gettysburg Address}}''', a famous speech delivered by U.S. president Abraham Lincoln in 1863, where he began by referring to the signing of the Declaration of Independence taking place "four score and seven years ago". A score is a dated term for the number 20, so "four score and seven" is equivalent to 87.
* A '''dog year''' is traditionally considered to be one-seventh the length of a normal human year, since a dog's overall lifespan is roughly one-seventh of a typical human's. The comic applies this to other units of time, such as minutes and months, each of which is also one-seventh the length of the standard unit. The number 7 (traditionally a "lucky number") is also used in many of the numbers quoted in the calendar.
* Other comparative durations of time that are not normally or usefully applied to day-length multiples. At the top end, there is the age of the universe, at the other there is {{w|Planck_units#Planck_time|Planck-time}} – with entire durations of periods of human history and the time needed to watch popular TV/film franchises in-between – most of which require a non-trivial multiplier or divisor to bring them to the necessary scale required.
* A '''{{w|baker's dozen}}''' is 13, or one more than a normal dozen. Here, the "baker's" prefix can be applied to any unit by adding an extra one of its constituent parts, like an extra hour added to a day.
* '''{{w|Irrational numbers}}''' like {{w|pi}} (3.14159...), {{w|Euler's number}} or ''e'' (2.71828...), the {{w|golden ratio}} (1.61803...), and the {{w|square root of 2}} (1.41421...). These are all interesting numbers because of their mathematical properties, but very impractical to use as arbitrary measurements of time because they have an endless series of non-repeating decimal digits.
* The teenage dating game '''{{w|Seven minutes in heaven}}'''.
* Rotation and revolution periods of various planets and moons in the Solar System.

{| class="wikitable"
|-
! Days !! Date !! Units !! Exact value !! Explanation
|-
| 83 || Jun 22 || πe millidecades || 82.0304 days || π ≈ 3.14159, e ≈ 2.718, so πe is about 22.459. A millidecade is 1/1000 decade, or 1/100 year, or 3.652425 days. Multiplying these results in 82.03 days. This is a play on {{w|Euler's identity}}, eiπ=-1, but raising pi to the power of e instead.
|-
| 82 || Jun 23 || 7 megaseconds || 81.0185 days || 7,000,000 seconds
|-
| 81 || Jun 24 || e lunar months || 80.27247 days || A lunar month ≈ 29.53059 days, e ≈ 2.718
|-
| 80 || Jun 25 || 60 rotations of Foucault's pendulum in Paris || 79.67 days || '''{{w|Paris}}''' is the capital city of '''{{w|France}}''' and it's located at a latitude of 48º 51' 23" N. '''{{w|Foucault's pendulum}}''' is a device conceived by French physicist '''{{w|Léon Foucault}}''', consisting of a pendulum that is free to rotate its plane of oscillation. When placed in a rotating '''{{w|Non-inertial reference frame}}''' such as the '''{{w|Earth}}''', that has an associated rotation period of 24 hours, the oscillation plane of Foucault's pendulum rotates at a rate determined by the Earth's period and the angle between the rotation axis of the frame of reference and the direction of its elongation in resting position, i.e. its latitude, with a period T = T🜨/sin(λ), being T🜨 Earth's period and λ the latitude of the pendulum. Historically, Léon Foucault performed this experiment in the city of Paris, most famously (although not for the first time, which happened at the '''{{w|Paris Observatory}}''') under the dome of the '''{{w|Panthéon}}''', to demonstrate Earth's rotation. At this latitude, Foucault's pendulum completes a full rotation every 31.8 hours.
|-
| 79 || Jun 26 || 8 milligenerations || 78.89 days || A generation is in general 22-33 years, with a reasonable mid-point of 27; and 8 x 0.001 (milli) x 365.2425 (accounting for leap years) x 27 ≈ 78.89 days
|-
| 78 || Jun 27 || 777,777 dog minutes || 77.16 days || A popular myth is that dogs age 7 times faster than humans, so 1 dog minute equals 1/7 human minutes.
|-
| 77 || Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads) || 77 days || 7!=7x6x5x4x3x2x1=5040 - The standard episode of ''Jeopardy'' is 22-26 minutes skipping ads - taking the lowest value you get 110880 minutes total, which is the exact value needed.
|-
| 76 || Jun 29 || 5,000 repeats of ''99 Bottles of Beer'' || 76.3889 days || Each verse of {{w|99 Bottles of Beer}} is "''N'' bottles of beer on the wall, ''N'' bottles of beer. Take one down, pass it around, ''N-1'' bottles of beer on the wall." The entire song contains 99 verses. Randall apparently sings this rather slowly at around 72 bpm, taking about 13 seconds per verse.
|-
| 75 || Jun 30 || 5 baker's fortnights (15 days) || 75 days || A {{w|baker's dozen}} is a dozen (12) plus 1 extra item. Randall has generalized this to adding 1 to any unit. A fortnight is 2 weeks, so a baker's fortnight is 15 days. 5x15 is 75 days.
|-
| 74 || Jul 1 || √2 dog years || 73.79 days || See day 78 (Jun 27)
|-
| 73 || Jul 2 || π millivics (1/1000th of Queen Victoria's reign) || 72.966631 days || {{w|Queen Victoria}} ruled between 20 June 1837 and 22 January 1901 (23,226 days).
|-
| 72 || Jul 3 || 42 drives from NYC to LA (Google Maps estimate) || 71.75 days || According to Google Maps, the drive from New York City to Los Angeles via I-80 W (2789 miles or 4489 km) takes 41 hours.
|-
| 71 || Jul 4 || 1,000 viewings of ''Groundhog Day''|| 70.14 days || Using {{w|Groundhog Day (film)|Groundhog Day's}} 101-minute run time.
|-
| 70 || Jul 5 || 100,000 minutes || 69.44 days ||
|-
| 69 || Jul 6 || 1/10th of Martian year || 68.70 Earth days || Martian sidereal and tropical years both round to 687.0 Earth days
|-
| 68 || Jul 7 || 1,234,567 sound-miles || 67.63 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 67.6349058 days.
|-
| 67 || Jul 8 || 2πe seconds || 66.7 days || 2^(π^e) = 5,766,073 seconds
|-
| 66 || Jul 9 || 216 beats (Swatch Internet Time) || 65.536 days || {{w|.beat}} is equal to 1/1000 day.
|-
| 65 || Jul 10 || 1,000 ISS orbits || 64.58 days || Each orbit of the ISS takes 90-93 minutes. Here a value of 93 minutes is used.
|-
| 64 || Jul 11 || Five hundred twenty five thousand (base seven) minutes|| 62.8833333333333 days || This refers to {{w|radix}}-7 arithmetic: 525,0007 minutes = 90,55210 minutes. Also references the opening and recurring line "Five hundred twenty five thousand six hundred minutes" from {{w|Seasons of Love}}, a song from the musical {{w|Rent (musical)|''Rent''}}, which is also referenced in [[1047: Approximations]]. "base seven" has the same rhythm as "six hundred".
|-
| 63 || Jul 12 || 1050 Planck times || 62.38 days || 10^50 x 5.39 x 10^-44 seconds
|-
| 62 || Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)|| 62.5 days || {{w|The Office (British TV series)|''The Office''}} was originally a {{w|BBC}} television show which had no commercial breaks, but Randall is obviously more familiar with the {{w|The_Office_(American_TV_series)|US version}}. This US "half-hour" comedy format contains 22.5 minutes of content (including the title sequence) and 7.5 minutes of ads. 
|-
| 61 || Jul 14 || Four score and seven kilominutes || 60.4166 days || 87 x 1000 minutes
|-
| 60 || Jul 15 || 2 lunar months || 59.06 days || There are a number of different ways to define the {{w|lunar month}}. The most common is the synodic month, because it relates to the phases of the moon, and it's approximately 29.53 days.
|-
| 59 || Jul 16 || Half a day on Venus || 58.375 days || A Venus synodic day is 116 days 18 hours.
|-
| 58 || Jul 17 || 5 megaseconds || 57.8704 days || 5,000,000 seconds
|-
| 57 || Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature) || 4681~4763 years × 10-6 || Randall is stating that "literature" was invented approximately 2700 BCE. This is consistent with the earliest surviving coherent Sumerian texts, but the earliest proto-writing likely developed at least 500 years earlier according to {{w|History of writing}}.
|-
| 56 || Jul 19 || 1,000 viewings of ''Run Lola Run'' || 55.556 days || Using {{w|Run Lola Run|the movie's}} run time of 80 minutes.
|-
| 55 || Jul 20 || One million sound-miles || 54.78 days || The speed of sound in air depends on the temperature. 15 °C or 59 °F gives the value 340 m/s and the travel time of 54.7843137 days.
|-
| 54 || Jul 21 || 30 Ionian months || 53.0741 days || Orbital period of Io around Jupiter is approximately 1.77 days.
|-
| 53 || Jul 22 || One dog year || 52.18 days || See day 78 (Jun 27)
|-
| 52 || Jul 23 || 60 viewings of ''Star Wars Episodes I-IX'' || 51.75 days || According to [https://dorksideoftheforce.com/2021/05/04/how-long-to-watch-every-star-wars-movie/ Fansided] the combined running times are 20 hours 42 minutes.
|-
| 51 || Jul 24 || 1/100,000,000,000th of the universe's age || 50.4035 days || The universe is estimated to be about 13.8 billion years old.
|-
| 50 || Jul 25 || 5 milli-generations || 49.3 days || See day 79 (Jun 26)
|-
| 49 || Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven'' || 48.61 days || {{w|Seven minutes in heaven}} is an Anglo-culture teenager game, occuring in several movies. 10,000 minutes in Heaven is almost a week of making out (or doing whatever in a broom closet), so this game is unlikely.
|-
| 48 || Jul 27 || φeπ minutes || 47.6164 days || 68,567.57 minutes
|-
| 47 || Jul 28 || 4 megaseconds || 46.2963 days || 4,000,000 seconds
|-
| 46 || Jul 29 || 216 minutes || 45.5111 days || 65,536 minutes
|-
| 45 || Jul 30 || eee seconds || 44.1467 days || 3,814,279.10 seconds
|-
| 44 || Jul 31 || π fortnights|| 43.98 days || 3.14159 x 14 days
|-
| 43 || Aug 1 || One devil's spacewalk (666 orbits of the ISS) || 43.01 days || See day 65 (Jul 10). 666 is the {{w|number of the beast}}.
|-
| 42 || Aug 2 || 1 kilowatt-hour per watt || 41.66 days || 1000 hours
|-
| 41 || Aug 3 || eπ Ionian months || 40.9390 days || Orbital period of Io around Jupiter is 1.769137786 days
|-
| 40 || Aug 4 || 30 rotations of Foucault's pendulum in Paris || 39.8357 days || Refer to Day 80 (Jun 25)
|-
| 39 || Aug 5 || e fortnights || 38.0559 days ||2.71828 x 14 days
|-
| 38 || Aug 6 || πe baker's days (25 hours) || 37.98 days || See day 75 (Jun 30)
|-
| 37 || Aug 7 || One deciyear || 36.52425 days || One tenth of one year
|-
| 36 || Aug 8 || 7! milliweeks || 35.28 days || 5040 × 0.001 weeks
|-
| 35 || Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music || 34.72 days || ''Think'' is the music played while the contestants try to answer the Final Jeopardy question; it is 30 seconds long.
|-
| 34 || Aug 10 || 1000 basketball games (game time) || 33.33 days || Uses the NBA game time of four 12-minute quarters, or 48 minutes
|-
| 33 || Aug 11 || 777 hours || 32.375 days ||
|-
| 32 || Aug 12 || One millilincoln (1/1000 of fourscore and seven years) || 31.78 days || {{w|Abraham Lincoln}}'s {{w|Gettysburg Address}} begins with the famous phrase "Four score and seven years ago". 1 score = twenty. 
|-
| 31 || Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads) || 31.25 days || Uses a television 'hour' containing 45 minutes of content and 15 minutes of ads
|-
| 30 || Aug 14 || All of ''Star Trek'', consecutively || ||
|-
| 29 || Aug 15 || 777,777 nanocenturies || 28.4077 days || 777,777 × 10-9 × 100 years
|-
| 28 || Aug 16 || One sidereal lunar month || 27.3 days || The time it takes moon to return to the same position relative to the fixed stars
|-
| 27 || Aug 17 || 6 dog months || 26.1 days || See day 78 (Jun 27)
|-
| 26 || Aug 18 || ππ kilominutes || 25.3209 days || 36,462.16 minutes
|-
| 25 || Aug 19 || 7 games of 7! minutes in Heaven || 24.5 days || 7 x 5040 (7 {{w|Factorial}}) minutes. See also day 49 (Jul 26).
|-
| 24 || Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy || 23.82 days || ''The Fellowship of the Ring'' extended version is 208 minutes, ''The Two Towers'' is 226 minutes, and ''The Return of the King'' is 252 minutes for its E.V.[https://fictionhorizon.com/how-long-are-all-the-lord-of-the-rings-and-the-hobbit-movies-combined/]
|-
| 23 || Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times || 22.21 days || See day 72 (Jul 3). This is for 6 round-trips and 1 one-way trip.
|-
| 22 || Aug 22 || ''It's a Small World'' sung at 1/10,000th speed || 21.18 days || {{w|It's a Small World}} is a song that was composed for the attraction of the same name at various {{w|Disney}} theme parks, and plays continuously at them in various languages.
|-
| 21 || Aug 23 || 500 hours || 20.8333 days ||
|-
| 20 || Aug 24 || √2 fortnights || 19.7990 days || 1.4142 × 14 days
|-
| 19 || Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles || 18.94 days || {{w|Vanessa Carlton}} is an American singer, and {{w|A Thousand Miles}} is her most successful song. Randall estimates her walking speed at about 2.2 miles/hour.
|-
| 18 || Aug 26 || 100,000 breaths || .26 min/breath || Normal respiratory rate for adults is typically 12-20 breaths per minute. Randall may have a health problem or be a practitioner of "slow breathing".
|-
| 17 || Aug 27 || √2 megaseconds || 16.3682 days || 1.4142 × 1,000,000 seconds
|-
| 16 || Aug 28 || πππ πcoseconds || 15.5112 days || 1.3402 × 1018 picoseconds (i.e., 10-12 seconds), making a joke how the mathematical "pi" is written with the character "π"
|-
| 15 || Aug 29 || One baker's fortnight (15 days) || 15 days || See day 75 (Jun 30)
|-
| 14 || Aug 30 || One baker's dozen (13) baker's days (25 hours) || 13.5416 days || 325 hours; see day 75 (Jun 30)
|-
| 13 || Aug 31 || 300 hours || 12.5 days ||
|-
| 12 || Sep 1 || One million seconds || 11.57 days ||
|-
| 11 || Sep 2 || One nonstop bike ride from NYC to LA || 10.54 days || Google maps estimates the trip at 253 hours
|-
| 10 || Sep 3 || 1⁄1,000th of a generation || 9.86 days || See day 79 (Jun 26)
|-
| 9 || Sep 4 || 777,777 seconds || 9.002 days ||
|-
| 8 || Sep 5 || 100 viewings of ''Groundhog Day'' || 7.014 days || See Day 71 (Jul 4).
|-
| 7 || Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven) || 6.04 days || 8,700 minutes
|-
| 6 || Sep 7 || One pico-universe-lifetime || 5.04 days || See Day 51 (Jul 24)
|-
| 5 || Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks || 4.63 days || The chorus lasts about 8 seconds per 'person'
|-
| 4 || Sep 9 || One centiyear || 3.652425 days || 365.24 days * 1/100
|-
| 3 || Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times || 2.79 days || Based on a length of 4 minutes, 1 second
|-
| 2 || Sep 11 || ''Speed'' (1994) played at one frame per second || 1.933 days || {{w|Speed_(1994_film)}} has runtime of 116 minutes = 6,960 seconds = 167,040 film frames at standard frame rate of 24 frames/second
|-
| 1 || Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1) || 0.7639 days || Each iteration contains ''N'' verses. ''N + N-1 + N-2 ... + 1'' equals ''N * (N+1) / 2'', so 99 recursions = 4950 verses. Using the same 13-second (72 bpm) rate as Jun 29, this is close to 18 hours. Probably refers to Donald Knuth's article {{w|The Complexity of Songs}}.
|-
| 0 || Sep 13 || ''What If? 2'' release day || ||
|}

The title text refers to the recursive time period on Sep 12. If you don't stop when you reach N=0 bottles, the repetition never ends, so that time interval becomes infinite. He likens it to {{w|The Song That Never Ends}}, another repetitive children's song, which is specifically intended to go on forever. The difference is that the Beer song has a natural stopping point at 0, while ''The Song That Never Ends'' is completely repetitive.

==Transcript==
{{incomplete transcript|Do NOT delete this tag too soon.}}

Large heading: Countdown to ''What if? 2''

Subheading: (Preorder at [https://xkcd.com/whatif2 xkcd.com/whatif2] to get it at the end of the countdown)

Remainder of comic is a calendar with the date in one corner of each day's box.

{| class="wikitable"
|-
! Date !! Description
|-
| Jun 22 || πe millidecades
|-
| Jun 23 || 7 megaseconds
|-
| Jun 24 || e lunar months
|-
| Jun 25 || 60 rotations of Foucault's pendulum in Paris
|-
| Jun 26 || 8 milligenerations
|-
| Jun 27 || 777,777 dog minutes
|-
| Jun 28 || 7! episodes of ''Jeopardy!'' (skipping ads)
|-
| Jun 29 || 5,000 repeats of ''99 Bottles of Beer''
|-
| Jun 30 || 5 baker's fortnights (15 days)
|-
| Jul 1 || √2 dog years
|-
| Jul 2 || π millivics (1/1000th of Queen Victoria's reign)
|-
| Jul 3 || 42 drives from NYC to LA (Google Maps estimate)
|-
| Jul 4 || 1,000 viewings of ''Groundhog Day''
|-
| Jul 5 || 100,000 minutes
|-
| Jul 6 || 1/10th of Martian year
|-
| Jul 7 || 1,234,567 sound-miles
|-
| Jul 8 || 2πe seconds
|-
| Jul 9 || 216 beats (Swatch Internet Time)
|-
| Jul 10 || 1,000 ISS orbits
|-
| Jul 11 || Five hundred twenty five thousand (base seven) minutes (text preceded by several drawn musical notes)
|-
| Jul 12 || 1050 Planck times
|-
| Jul 13 || 4,000 episodes of ''The Office'' (skipping ads)
|-
| Jul 14 || Four score and seven kilominutes
|-
| Jul 15 || 2 lunar months
|-
| Jul 16 || Half a day on Venus
|-
| Jul 17 || 5 megaseconds
|-
| Jul 18 || 30 microLits (1/1,000,000th of the time since the invention of literature)
|-
| Jul 19 || 1,000 viewings of ''Run Lola Run''
|-
| Jul 20 || One million sound-miles
|-
| Jul 21 || 30 Ionian months
|-
| Jul 22 || One dog year
|-
| Jul 23 || 60 viewings of ''Star Wars Episodes I-IX''
|-
| Jul 24 || 1/100,000,000,000th of the universe's age
|-
| Jul 25 || 5 milli-generations
|-
| Jul 26 || 10,000 games of ''7 minutes in Heaven'' or 7 games of ''10,000 minutes in Heaven''
|-
| Jul 27 || φeπ minutes
|-
| Jul 28 || 4 megaseconds
|-
| Jul 29 || 216 minutes
|-
| Jul 30 || eee seconds
|-
| Jul 31 || π fortnights
|-
| Aug 1 || one devil's spacewalk (666 orbits of the ISS)
|-
| Aug 2 || 1 kilowatt-hour per watt
|-
| Aug 3 || eπ Ionian months
|-
| Aug 4 || 30 rotations of Foucault's pendulum in Paris
|-
| Aug 5 || e fortnights
|-
| Aug 6 || πe baker's days (25 hours)
|-
| Aug 7 || one deciyear
|-
| Aug 8 || 7! milliweeks
|-
| Aug 9 || 100,000 plays of the ''Jeopardy!'' "Think" music
|-
| Aug 10 || 1000 basketball games (game time)
|-
| Aug 11 || 777 hours
|-
| Aug 12 || one millilincoln (1/1000 of fourscore and seven years)
|-
| Aug 13 || 1,000 episodes of ''60 Minutes'' (skipping ads)
|-
| Aug 14 || All of ''Star Trek'', consecutively
|-
| Aug 15 || 777,777 nanocenturies
|-
| Aug 16 || one sidereal lunar month
|-
| Aug 17 || 6 dog months
|-
| Aug 18 || ππ kilominutes
|-
| Aug 19 || 7 games of ''7! minutes in Heaven''
|-
| Aug 20 || 50 viewings of the extended ''Lord of the Rings'' trilogy
|-
| Aug 21 || A drive from NYC to LA where you keep remembering new things you forgot and have to go back 6 times
|-
| Aug 22 || ''It's a Small World'' sung at 1/10,000th speed
|-
| Aug 23 || 500 hours
|-
| Aug 24 || √2 fortnights
|-
| Aug 25 || Time it would take Vanessa Carlton to walk 1,000 miles
|-
| Aug 26 || 100,000 breaths
|-
| Aug 27 || √2 megaseconds
|-
| Aug 28 || πππ πcoseconds
|-
| Aug 29 || One baker's fortnight (15 days)
|-
| Aug 30 || One baker's dozen (13) baker's days (25 hours)
|-
| Aug 31 || 300 hours
|-
| Sep 1 || One million seconds
|-
| Sep 2 || One nonstop bike ride from NYC to LA
|-
| Sep 3 || 1⁄1,000th of a generation
|-
| Sep 4 || 777,777 seconds
|-
| Sep 5 || 100 viewings of ''Groundhog Day''
|-
| Sep 6 || 100 games of ''Lincoln Kissing'' (Fourscore and seven minutes in Heaven)
|-
| Sep 7 || One pico-universe-lifetime
|-
| Sep 8 || The ''Baby Shark'' chorus for a family of 50,000 sharks
|-
| Sep 9 || One centiyear
|-
| Sep 10 || Cyndi Lauper's ''Time After Time'' played 1,000 times
|-
| Sep 11 || ''Speed'' (1994) played at one frame per second
|-
| Sep 12 || F(99) where F(N) means sing all the verses of ''N Bottles of Beer On the wall'' followed by F(N-1)
|-
| Sep 13 || ''What If? 2'' release day
|}
{{comic discussion}}
[[Category:Book promotion]]
[[Category:Comics featuring real people]]
[[Category:Songs]]
[[Category:Animals]]

21: Kepler

2022-06-12T02:34:11Z

162.158.166.183: /* Explanation */ fixed grammar mistake plural vs. singular

{{comic
| number = 21
| date = October 17, 2005
| title = Kepler
| image = kepler.jpg
| titletext = Science joke. You should probably move along.
}}

==Explanation==
A Cueball-like guy asks [[Cueball]], the store manager, how they keep the store so clean, and he is told that they have hired Kepler, a hard worker who doesn't mind the monotony and sweeps out the same area every night.

{{w|Johannes Kepler}} was a German mathematician, astronomer, and astrologer, best known for his laws of planetary motion. By using {{w|Tycho Brahe}}'s observations of our solar system (Brahe gave Kepler the job of observing and explaining the motion of the planet Mars), Kepler was able to deduce that planets in the system do not move in circular orbits around the Sun, but rather in elliptical ones.
In doing so, he directly contradicted Brahe's own conviction that the Earth was the centre of the universe.

According to {{w|Kepler's_laws_of_planetary_motion#Second_law|Kepler's Second Law}}, "A line joining a planet and the Sun sweeps out equal areas during equal intervals of time," somewhat akin to sweeping a broom over the floor.

In the comic, the janitor Kepler also sweeps the same area, although in this case, "area" is used in the sense of "surface" (of floor) rather than in the purely mathematical sense. It is also very monotonous, like a planet's set orbit, but Kepler doesn't mind this.

The comic could also be seen as a subtle reference to the Kepler space telescope that was searching for exoplanets (planets outside the Solar system) from March 2009 to August 2013, by looking at exactly the same spot in the night sky over and over again. Even though the telescope was not launched until 4 years after this comic was published, the details of Project Kepler had been disclosed by NASA press releases [https://www.nasa.gov/centers/ames/news/releases/2001/01_107AR.html as early as 2001].

The title text assumes that the reader is scientifically illiterate and won't understand the joke, which is ironic, considering how xkcd came to be known for embracing STEM fields and nerdiness in general.

==Transcript==
:[Two Cueball-like guys stand in an aisle in a store.]
:Cueball: Nice store. How do you keep the floors so clean?
:Store manager: Oh, we hired this dude named Kepler, he's really good. Hard worker. Doesn't mind the monotony. Sweeps out the same area every night.

==Trivia==
*This was the 20th comic originally posted to [[LiveJournal]].
**The previous was [[20: Ferret]].
**The next was [[44: Love]].
*Original title: "Monday's drawing"
*Original [[Randall]] quote: "Another one which, if you don't get, you're probably better off."
*This comic was posted on [[xkcd]] when the web site opened on Sunday the 1st of January 2006.
**It was posted along [[:Category:First day on xkcd|with all 41 comics]] posted before that on LiveJournal as well as a few others.
**The latter explaining why the numbers of these 41 LiveJournal comics ranges from 1-44.
**This is the same day that NASA announced the delay of Project Kepler due to budget cuts.
*One of the original drawings drawn on [[:Category:Checkered paper|checkered paper]].

{{comic discussion}}
[[Category:Comics posted on livejournal| 20]]
[[Category:First day on xkcd]]
[[Category:Checkered paper]]
[[Category:Comics featuring real people]]
[[Category:Comics featuring Cueball]]
[[Category:Multiple Cueballs]]
[[Category:Astronomy]]
[[Category:Comics with lowercase text]]

2626: d65536

2022-06-02T01:24:48Z

162.158.166.183: /* Explanation */ I am extremely skeptical that a die with many faces, a few of which are rounded, could possibly be fair. The faces next to the rounded ones would be favored.

{{comic
| number = 2626
| date = May 30, 2022
| title = d65536
| image = d65536.png
| titletext = They're robust against quantum attacks because it's hard to make a quantum system that large
}}

==Explanation==
{{incomplete|Created by a HEXAKISMYRIAPENTAKISCHILIAPENTAHECTATRIACONTAKAIHEXAHEDRON - The claim in the trivia that the numbers refer to a comic, should be substantiated with an explanation. If true interesting, if not... Do NOT delete this tag too soon.}}
In binary computing, 16 bit unsigned numbers range from 0 to 65535, for a total of 65536 unique numbers, a number which is hence well-known to software engineers. Generating large numbers in a manner that is truly random is a recurring problem in cryptography, required to send private messages to another party. People today still use dierolls to generate private random numbers.

In role-playing games (and occasionally in other tabletop games), multiple shapes of dice are often used to generate random numbers in specific ranges. By convention, these are referred to as d''n'' according to their number of faces. A traditional six-faced die would be a d6, and many popular pen-and-paper role-playing games use dice ranging between d4 and d20. While there are larger dice used in tabletop games (most commonly d100), these are usually split into multiple smaller ones. For example, a d100 is often two d10s rolled together, with one die providing the first digit and the other die giving the second digit — the total number of possible combinations (100) is the product of the number of faces of the two dice (10 * 10). While "real" {{w|Zocchihedron|d100s}} and other large-numbered dice do exist, most people consider them to be impractical: they need to be either impractically large or have very small faces (resulting in small print for the numbers), they're close enough to being spheres that it's difficult to get them into a stable resting position, and even if they are stationary, determining which face is "on top" is difficult to do by eye. The Zocchihedron (d100) die is also biased because of geometry requiring different sized faces, the next unbiased die is a d120, it is very likely that [[Cueball|Cueball's]] d65536 die is also biased.

Here, Cueball has constructed a d65536 for generating random 16 bit numbers. It may have solved the problem of generating large random numbers with fewer die rolls, but it magnifies all of the problems with large-numbered dice to ludicrous extremes. In order for the faces to be readable, the die is ridiculously huge, dwarfing the human standing next to it. Rolling such a die is not only physically challenging, but it would also need a huge space in which to roll if the result is to be random, and that space would need to have an extremely flat and rigid surface in order for the die to come to rest. And even in those problems were solved, simply getting to a vantage point to see the top of the die would be a major challenge, and determining which number was truly on top would be near impossible to do by eye. If one really wished to use dice, it would be much easier to simply use multiple dice rolls. For instance, one could roll eight d4 dice (or use 16 coin flips), and convert the result into binary. This has the same randomness as a single die roll{{fact}}?, but can take much longer, so people do purchase d16s to simplify it and speed it up.

The closest regular shape similar to the depicted in the comic could be a {{w|Goldberg polyhedron}}. However, no such polyhedron exists with exactly 65536 hexagonal faces. The closest Goldberg Polyhedron has a mixture of 65520 hexagons and 12 pentagons, totaling 65532 faces. It is possible to construct a fair die without a matching regular shape by limiting the sides which it could land on and designing those sides to be fair (for instance, a prism with rectangular facets that extend its entire length, and rounded ends to ensure it doesn't balance on end).{{citation needed}}

The title text references how cryptographic systems (especially RSA and other factoring-is-hard based systems) are vulnerable to quantum attacks as quantum computing technology develops. The title text is essentially punning on the idea of a "large" quantum system. "Large" in the quantum computing sense would be on the order of 64 qubits each of which would be an atom or two at most. This would still be microscopic and will never be as large as the giant die the comic is centered on; but for a well-observed environment and human rolling without sufficient entropy (consider somebody obsessed with a certain number dropping the die on something soft), a conventional computer could predict some rolls. See also [[538]] for non-mathematical paths of cryptography.

==Transcript==
:[A large sphere with a several lines, and in some places grids, are shown. Cueball, standing next to it, is dwarfed by its size, as it is at least seven times as tall as he is. The sphere has many lines following various great circles or parallel lesser circles around the curve of the sphere, and some patches of cross hatching to suggest further texturing along these lines hovering just below the degree of most of the illustrative detailing. In the top right part of the ball is a black circle. An arrow points to this circle, and the end of the arrow goes to a larger circle that partly obscures the rightmost part of the sphere. The circle shows a zoom in on the surface in the black circle on the sphere. The zoom shows a small portion of the spheres surface, showing that the grid comes along because the sphere is divided into elongated hexagonal faces with numbers up to at least five-digits. Seven numbers can be fully seen, but there are nine other faces partly shown, five of these with part of their numbers visible, one of these clearly only have four digits. One of the empty faces must also have a number with only 1-3 digits, as no numbers are visible although a significant part of the face is visible.]

:[Here follows the numbers in the zoomed in part of the sphere, with "..." represents numbers being cut off. The numbers are read in lines left to right, even though the numbers are tilted from down towards the right, which could have suggested a different reading order.]
:30827
:16[bottom part of a cut-off line][small cut-off circle]
:...38
:11875
:25444
:...[top part of a cut-off line]5
:12082
:28525
:3 [left part of a cut-off line]...
:13359
:13874
:[Two cut-off lines, likely the start of the number 2]...

:[Caption below the image:]
:The hardest part of securely generating random 16-bit numbers is rolling the d65536.

==Trivia==
*If a real d65536 were constructed with each number having an equal area and each printed in 12 point font, the resulting die would be about 5 feet (1.5 meters) in diameter, which isn't several times the size of a person as the comic suggests, but is still large enough to be hilariously inconvenient. If it were made out of standard acrylic, and not hollow, it would weigh about 2 tons (1700kg).
*This die would have a 0.00001526 chance of rolling a natural one (or any other number).
*There are seven 16-bit numbers fully visible in the picture: 30827, 25444, 11875, 28525, 12082, 13874 and 13359. They conceal a message. If these numbers are split big-endian into two 8-bit ASCII characters each, the result is <code>xkcd.com/2624/</code>[https://dotnetfiddle.net/fjLYZe].

{{comic discussion}}

[[Category:Cryptography]]
[[Category:Comics featuring Cueball]]

2620: Health Data

2022-05-18T02:02:51Z

162.158.166.183: /* Explanation */ better pronoun

{{comic
| number = 2620
| date = May 16, 2022
| title = Health Data
| image = health_data.png
| titletext = Donate now to help us find a cure for causality. No one should have to suffer through events because of other events.
}}

==Explanation==
{{incomplete|Created by A UNIQUE SEQUENCE OF PAST EVENTS YIELDING FURTHER INFORMATION IF INVESTIGATED - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
[[Cueball]] is at the hospital for some form of check-up. [[:Category:Doctor Ponytail|Doctor Ponytail]] comes in to inform him of the tests they have run, but her statements are frustratingly generic, and so lacking in diagnostic usefulness. She says that his "numbers" have revealed some "measurements" and "variables" but doesn't specify what they are. The fact that there are measurements and variables relate to them having been taken, but is correlated with very few outcomes other than those associated with measurement.

In response to being asked whether that is bad, she ominously says that they are the number one cause of "outcomes." This is obvious, and therefore unhelpful, since every outcome is the product of some set of variables. Additionally, outcomes can be good, bad, or neutral, so it does not address the question.

Doctor Ponytail further states that the past is "a big contributor to" the future, a similarly {{w|Tautology (logic)|tautological}} statement, as Cueball implies by asking whether that is just {{w|causality}}. The doctor replies ominously that causality is the leading cause of death, which is also so tautological as to be meaningless though technically correct.

Cueball tries to cut to the root of the issue by asking "what are my chances of survival?" Ponytail asks what is Cueball's family history, but rather than asking if his family has a history of similar symptoms to Cueball himself she is just asking if he has any family history whatsoever. Her apparent concern on discovering that he does is presumably due to the fact that everyone who has a family history dies, and therefore she sees this as a negative thing. However, this is not medically informative, since everyone has some kind of family history (whether they personally know anything of it or not) and everyone eventually dies.{{Citation needed}}

The comic is likely a comment on the impenetrability of some medical diagnoses, where high levels of jargon and non-contextualized statistics, combined with a lot of hedging language, can leave patients none the wiser about their prospects, or the relative merits of various courses of treatment. Similarly, it could be reflecting on the effects of {{w|availability bias}} and the {{w|base rate fallacy}} when medical practitioners are deriving diagnoses and similar conclusions from medical records designed to highlight the information necessary to diagnose specific well-understood illnesses. It may also be making fun of poorly defined health statistics: statistics for the [https://www.gwclaw.com/blog/accidental-death-causes/ leading causes of accidental death in the United States], for example, typically cite 'poisoning' as the number one cause, even though poisoning other than drug overdoses is actually quite rare. The comic takes vague statistics to the extreme, citing 'causality' as the leading cause of death.

The title text continues the joke, suggesting that researchers are searching for a cure for causality, which is absurd and inconceivable.

The comic as a whole is reminiscent of [[830: Genetic Analysis]] and [[1840: Genetic Testing Results]] (particularly the title text of the latter), as the information given by the doctor in all three is self-evident and useless as a result.

==Transcript==
:[Cueball and Doctor Ponytail are talking to each other. Cueball is sitting on an examination table and Doctor Ponytail, in a doctor's coat, is looking down and reading from a clipboard with some illegible writing on it.]
:Doctor Ponytail: I'm taking a look at your numbers, and it doesn't look good.
:Doctor Ponytail: You have a lot of measurements. Quite a few variables.

:[Same setting but Doctor Ponytail looks up at Cueball.]
:Cueball: Is that... bad?
:Doctor Ponytail: Variables are the #1 risk factor for outcomes.
:Doctor Ponytail: The past is a big contributor to the future.

:[Same setting but Doctor Ponytail puts her arm with the clipboard down.]
:Cueball: Isn't that just causality?
:Doctor Ponytail: Causality is the leading cause of death in this country.

:[Same setting.]
:Cueball: So what are my odds?
:Doctor Ponytail: Do you have a family history?
:Cueball: Of what?
:Doctor Ponytail: Just, in general.
:Cueball: ...Yes?
:Doctor Ponytail: Oh no.

{{comic discussion}}

[[Category:Comics featuring Cueball]]
[[Category:Comics featuring Ponytail]]
[[Category:Doctor Ponytail]]
[[Category:Medicine]]

Talk:2620: Health Data

2022-05-18T01:56:30Z

162.158.166.183: typo

Did a basefor the setup[[Special:Contributions/108.162.246.34|108.162.246.34]] 23:51, 16 May 2022 (UTC)a

"Cure for Causality" sounds like a pretty good band name. [[Special:Contributions/141.101.104.4|141.101.104.4]] 07:13, 17 May 2022 (UTC)

Panel 1 reminds me of a conversation I had with one of my docs. I'd had some blood work done and the doc said, "The numbers look good. For a man your age." I mean, really; for a man my age? I didn't think we'd been talking about some teenager . . . . [[Special:Contributions/172.70.130.161|172.70.130.161]] 08:40, 17 May 2022 (UTC)
:Yeah, but it's possibly even worse when a gynacologist says those exact words... ;) [[Special:Contributions/172.70.162.77|172.70.162.77]] 11:23, 17 May 2022 (UTC)

Is poisoning other than drug overdoses that rare? The linked source states:
"1. Poisoning
Due in large part to the opioid epidemic, poisoning has overtaken car crashes as the country’s leading cause of accidental death, with 64,795 poisoning deaths in 2017, 22,000 of them from opioid painkillers. Additionally, people can be poisoned by common household substances, including:

Carbon monoxide
Pesticides and cleaning products
Lead"

even without the 22,000 opoid painkiller deaths posioning would still be number 1.[[Special:Contributions/162.158.50.68|162.158.50.68]] 09:25, 17 May 2022 (UTC)

:Well, there are other drugs you can overdose with. However, the most obvious problem with that statistics is that many people would assume that "poisoning" means "being deliberate poisoned", but most of those deaths from poisoning are accidents. -- [[User:Hkmaly|Hkmaly]] ([[User talk:Hkmaly|talk]]) 21:39, 17 May 2022 (UTC)

Should we also link 1471 Gut Fauna wich shows another ewemple of Dr Ponytail practicing a weird form of medicine ?[[Special:Contributions/162.158.50.68|162.158.50.68]] 09:25, 17 May 2022 (UTC)

It is meant as a joke here, but ultimately life might just achieve this one day, uncoupling action from harm.

'Vagueness' is really an insufficient description for the absolute insanity that is blaming the passage of time for your problems. Almost to the point of being humorous in its own right. --[[Special:Contributions/172.69.33.199|172.69.33.199]] 10:13, 17 May 2022 (UTC)
: My nice little homo sapiens is turning into robots and they haven't even solved war. Curse evolution! I should have given them long distance communication thousands of years ago! [[Special:Contributions/172.70.230.143|172.70.230.143]] 15:35, 17 May 2022 (UTC)

Can it be also a pun: 'causality' vs 'casualty'? [[User:Tkopec|Tkopec]] ([[User talk:Tkopec|talk]]) 10:32, 17 May 2022 (UTC)

I think I might be covering up existing advantages with my description of a cold war from my dynamic ip. Be great if somebody could add cited material around that, but of course it's very hard to relate around norms of suppressed discussion. [[Special:Contributions/172.70.110.65|172.70.110.65]] 16:21, 17 May 2022 (UTC)

Check your family tree for any incidence of death. If all your forbears at any past generation are mortal, then science shows that with a high level of confidence that you are mortal.

The Inheritance Pattern of Death by Joseph Eastern, M.D., Carol Drucker, M.D. and John E. Wolf, Jr., M.D., 1982, J.I.R. Volume 28, Issue 22
[[http://www.linkedin.com/in/Comet Comet]] 17:40, 17 May 2022 (UTC)
:Sounds legit, although technically family history is not needed: statistically, everyone is mortal. The leading cause of death is being alive. -- [[User:Hkmaly|Hkmaly]] ([[User talk:Hkmaly|talk]]) 21:39, 17 May 2022 (UTC)

If you have a lot of doctor visits, it's probably the case that you have some chronic illness, and also that you have a lot of measurements. Nevertheless, how many measurements you've had is not a good metric of health. Robert Carnegie rja.carnegie@gmail.com [[Special:Contributions/172.70.90.145|172.70.90.145]] 19:34, 17 May 2022 (UTC)

I'm convinced this particular comic is a snipe at poor control of {{w|availability bias}} and {{w|base rate fallacy}} in family medicine, (perhaps even involving the roots of the opioid crisis and similar scandals) so I added those and did a lot of copy-editing including adding some overlooked comic dialog and trimming about six or seven sentences of proposed possible explanations which were entirely unconvincing to me. If you put one of your potential explanations that I deleted back in, please try to flesh it out a little showing how it might relate to the actual comic instead of just sharing vague abstract philosophical similarities. Thank you! [[Special:Contributions/162.158.166.183|162.158.166.183]] 01:55, 18 May 2022 (UTC)

Talk:2620: Health Data

2022-05-18T01:55:49Z

162.158.166.183: explain deletions

Did a basefor the setup[[Special:Contributions/108.162.246.34|108.162.246.34]] 23:51, 16 May 2022 (UTC)a

"Cure for Causality" sounds like a pretty good band name. [[Special:Contributions/141.101.104.4|141.101.104.4]] 07:13, 17 May 2022 (UTC)

Panel 1 reminds me of a conversation I had with one of my docs. I'd had some blood work done and the doc said, "The numbers look good. For a man your age." I mean, really; for a man my age? I didn't think we'd been talking about some teenager . . . . [[Special:Contributions/172.70.130.161|172.70.130.161]] 08:40, 17 May 2022 (UTC)
:Yeah, but it's possibly even worse when a gynacologist says those exact words... ;) [[Special:Contributions/172.70.162.77|172.70.162.77]] 11:23, 17 May 2022 (UTC)

Is poisoning other than drug overdoses that rare? The linked source states:
"1. Poisoning
Due in large part to the opioid epidemic, poisoning has overtaken car crashes as the country’s leading cause of accidental death, with 64,795 poisoning deaths in 2017, 22,000 of them from opioid painkillers. Additionally, people can be poisoned by common household substances, including:

Carbon monoxide
Pesticides and cleaning products
Lead"

even without the 22,000 opoid painkiller deaths posioning would still be number 1.[[Special:Contributions/162.158.50.68|162.158.50.68]] 09:25, 17 May 2022 (UTC)

:Well, there are other drugs you can overdose with. However, the most obvious problem with that statistics is that many people would assume that "poisoning" means "being deliberate poisoned", but most of those deaths from poisoning are accidents. -- [[User:Hkmaly|Hkmaly]] ([[User talk:Hkmaly|talk]]) 21:39, 17 May 2022 (UTC)

Should we also link 1471 Gut Fauna wich shows another ewemple of Dr Ponytail practicing a weird form of medicine ?[[Special:Contributions/162.158.50.68|162.158.50.68]] 09:25, 17 May 2022 (UTC)

It is meant as a joke here, but ultimately life might just achieve this one day, uncoupling action from harm.

'Vagueness' is really an insufficient description for the absolute insanity that is blaming the passage of time for your problems. Almost to the point of being humorous in its own right. --[[Special:Contributions/172.69.33.199|172.69.33.199]] 10:13, 17 May 2022 (UTC)
: My nice little homo sapiens is turning into robots and they haven't even solved war. Curse evolution! I should have given them long distance communication thousands of years ago! [[Special:Contributions/172.70.230.143|172.70.230.143]] 15:35, 17 May 2022 (UTC)

Can it be also a pun: 'causality' vs 'casualty'? [[User:Tkopec|Tkopec]] ([[User talk:Tkopec|talk]]) 10:32, 17 May 2022 (UTC)

I think I might be covering up existing advantages with my description of a cold war from my dynamic ip. Be great if somebody could add cited material around that, but of course it's very hard to relate around norms of suppressed discussion. [[Special:Contributions/172.70.110.65|172.70.110.65]] 16:21, 17 May 2022 (UTC)

Check your family tree for any incidence of death. If all your forbears at any past generation are mortal, then science shows that with a high level of confidence that you are mortal.

The Inheritance Pattern of Death by Joseph Eastern, M.D., Carol Drucker, M.D. and John E. Wolf, Jr., M.D., 1982, J.I.R. Volume 28, Issue 22
[[http://www.linkedin.com/in/Comet Comet]] 17:40, 17 May 2022 (UTC)
:Sounds legit, although technically family history is not needed: statistically, everyone is mortal. The leading cause of death is being alive. -- [[User:Hkmaly|Hkmaly]] ([[User talk:Hkmaly|talk]]) 21:39, 17 May 2022 (UTC)

If you have a lot of doctor visits, it's probably the case that you have some chronic illness, and also that you have a lot of measurements. Nevertheless, how many measurements you've had is not a good metric of health. Robert Carnegie rja.carnegie@gmail.com [[Special:Contributions/172.70.90.145|172.70.90.145]] 19:34, 17 May 2022 (UTC)

I'm convinced this particular comic is a snipe at poor control of {{w|availability bias}} and {{w|base rate fallacy}} in family medicine, (perhaps even involving the roots of the opioid crisis and similar scandals) so I added those and did a lot of copyediting including adding some overlooked comic dialog and trimming about six or seven sentences of proposed possible explanations which were entirely unconvincing o me. If you put one of your potential explanations that I deleted back in, please try to flesh it out a little showing how it might relate to the actual comic instead of just sharing vague abstract philosophical similarities. Thank you! [[Special:Contributions/162.158.166.183|162.158.166.183]] 01:55, 18 May 2022 (UTC)

2620: Health Data

2022-05-18T01:49:14Z

162.158.166.183: /* Explanation */ outcomes can't be indifferent -- people can be indifferent to outcomes

{{comic
| number = 2620
| date = May 16, 2022
| title = Health Data
| image = health_data.png
| titletext = Donate now to help us find a cure for causality. No one should have to suffer through events because of other events.
}}

==Explanation==
{{incomplete|Created by A UNIQUE SEQUENCE OF PAST EVENTS YIELDING FURTHER INFORMATION IF INVESTIGATED - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
[[Cueball]] is at the hospital for some form of check-up. [[:Category:Doctor Ponytail|Doctor Ponytail]] comes in to inform him of the tests they have run, but her statements are frustratingly generic, and so lacking in diagnostic usefulness. She says that his "numbers" have revealed some "measurements" and "variables" but doesn't specify what they are. The fact that there are measurements and variables relate to them having been taken, but is correlated with very few outcomes other than those associated with measurement.

In response to being asked whether this is bad, she ominously says that they are the number one cause of "outcomes." This is obvious, and therefore unhelpful, since every outcome is the product of some set of variables. Additionally, outcomes can be good, bad, or neutral, so it does not address the question.

Doctor Ponytail further states that the past is "a big contributor to" the future, a similarly {{w|Tautology (logic)|tautological}} statement, as Cueball implies by asking whether that is just {{w|causality}}. The doctor replies ominously that causality is the leading cause of death, which is also so tautological as to be meaningless though technically correct.

Cueball tries to cut to the root of the issue by asking "what are my chances of survival?" Ponytail asks what is Cueball's family history, but rather than asking if his family has a history of similar symptoms to Cueball himself she is just asking if he has any family history whatsoever. Her apparent concern on discovering that he does is presumably due to the fact that everyone who has a family history dies, and therefore she sees this as a negative thing. However, this is not medically informative, since everyone has some kind of family history (whether they personally know anything of it or not) and everyone eventually dies.{{Citation needed}}

The comic might be making fun of poorly defined health statistics: statistics for the [https://www.gwclaw.com/blog/accidental-death-causes/ leading causes of accidental death in the United States], for example, typically cite 'poisoning' as the number one cause, even though poisoning other than drug overdoses is actually quite rare. The comic takes vague statistics to the extreme, citing 'causality' as the leading cause of death. It may also be a comment on the impenetrability of some medical diagnoses, where high levels of jargon and non-contextualized statistics, combined with a lot of hedging language, can leave patients none the wiser about their prospects, or the relative merits of various courses of treatment. Similarly, it could be reflecting on the effects of {{w|availability bias}} and the {{w|base rate fallacy}} when medical practitioners are deriving diagnoses and similar conclusions from medical records designed to highlight the information necessary to diagnose specific well-understood illnesses.

The title text continues the joke, suggesting that researchers are searching for a cure for causality, which is absurd and inconceivable.

The comic as a whole is reminiscent of [[830: Genetic Analysis]] and [[1840: Genetic Testing Results]] (particularly the title text of the latter), as the information given by the doctor in all three is self-evident and useless as a result.

==Transcript==
:[Cueball and Doctor Ponytail are talking to each other. Cueball is sitting on an examination table and Doctor Ponytail, in a doctor's coat, is looking down and reading from a clipboard with some illegible writing on it.]
:Doctor Ponytail: I'm taking a look at your numbers, and it doesn't look good.
:Doctor Ponytail: You have a lot of measurements. Quite a few variables.

:[Same setting but Doctor Ponytail looks up at Cueball.]
:Cueball: Is that... bad?
:Doctor Ponytail: Variables are the #1 risk factor for outcomes.
:Doctor Ponytail: The past is a big contributor to the future.

:[Same setting but Doctor Ponytail puts her arm with the clipboard down.]
:Cueball: Isn't that just causality?
:Doctor Ponytail: Causality is the leading cause of death in this country.

:[Same setting.]
:Cueball: So what are my odds?
:Doctor Ponytail: Do you have a family history?
:Cueball: Of what?
:Doctor Ponytail: Just, in general.
:Cueball: ...Yes?
:Doctor Ponytail: Oh no.

{{comic discussion}}

[[Category:Comics featuring Cueball]]
[[Category:Comics featuring Ponytail]]
[[Category:Doctor Ponytail]]
[[Category:Medicine]]

2620: Health Data

2022-05-18T01:48:11Z

162.158.166.183: /* Explanation */ similarly

{{comic
| number = 2620
| date = May 16, 2022
| title = Health Data
| image = health_data.png
| titletext = Donate now to help us find a cure for causality. No one should have to suffer through events because of other events.
}}

==Explanation==
{{incomplete|Created by A UNIQUE SEQUENCE OF PAST EVENTS YIELDING FURTHER INFORMATION IF INVESTIGATED - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
[[Cueball]] is at the hospital for some form of check-up. [[:Category:Doctor Ponytail|Doctor Ponytail]] comes in to inform him of the tests they have run, but her statements are frustratingly generic, and so lacking in diagnostic usefulness. She says that his "numbers" have revealed some "measurements" and "variables" but doesn't specify what they are. The fact that there are measurements and variables relate to them having been taken, but is correlated with very few outcomes other than those associated with measurement.

In response to being asked whether this is bad, she ominously says that they are the number one cause of "outcomes." This is obvious, and therefore unhelpful, since every outcome is the product of some set of variables. Additionally, outcomes can be good, bad, or indifferent, so it does not address the question.

Doctor Ponytail further states that the past is "a big contributor to" the future, a similarly {{w|Tautology (logic)|tautological}} statement, as Cueball implies by asking whether that is just {{w|causality}}. The doctor replies ominously that causality is the leading cause of death, which is also so tautological as to be meaningless though technically correct.

Cueball tries to cut to the root of the issue by asking "what are my chances of survival?" Ponytail asks what is Cueball's family history, but rather than asking if his family has a history of similar symptoms to Cueball himself she is just asking if he has any family history whatsoever. Her apparent concern on discovering that he does is presumably due to the fact that everyone who has a family history dies, and therefore she sees this as a negative thing. However, this is not medically informative, since everyone has some kind of family history (whether they personally know anything of it or not) and everyone eventually dies.{{Citation needed}}

The comic might be making fun of poorly defined health statistics: statistics for the [https://www.gwclaw.com/blog/accidental-death-causes/ leading causes of accidental death in the United States], for example, typically cite 'poisoning' as the number one cause, even though poisoning other than drug overdoses is actually quite rare. The comic takes vague statistics to the extreme, citing 'causality' as the leading cause of death. It may also be a comment on the impenetrability of some medical diagnoses, where high levels of jargon and non-contextualized statistics, combined with a lot of hedging language, can leave patients none the wiser about their prospects, or the relative merits of various courses of treatment. Similarly, it could be reflecting on the effects of {{w|availability bias}} and the {{w|base rate fallacy}} when medical practitioners are deriving diagnoses and similar conclusions from medical records designed to highlight the information necessary to diagnose specific well-understood illnesses.

The title text continues the joke, suggesting that researchers are searching for a cure for causality, which is absurd and inconceivable.

The comic as a whole is reminiscent of [[830: Genetic Analysis]] and [[1840: Genetic Testing Results]] (particularly the title text of the latter), as the information given by the doctor in all three is self-evident and useless as a result.

==Transcript==
:[Cueball and Doctor Ponytail are talking to each other. Cueball is sitting on an examination table and Doctor Ponytail, in a doctor's coat, is looking down and reading from a clipboard with some illegible writing on it.]
:Doctor Ponytail: I'm taking a look at your numbers, and it doesn't look good.
:Doctor Ponytail: You have a lot of measurements. Quite a few variables.

:[Same setting but Doctor Ponytail looks up at Cueball.]
:Cueball: Is that... bad?
:Doctor Ponytail: Variables are the #1 risk factor for outcomes.
:Doctor Ponytail: The past is a big contributor to the future.

:[Same setting but Doctor Ponytail puts her arm with the clipboard down.]
:Cueball: Isn't that just causality?
:Doctor Ponytail: Causality is the leading cause of death in this country.

:[Same setting.]
:Cueball: So what are my odds?
:Doctor Ponytail: Do you have a family history?
:Cueball: Of what?
:Doctor Ponytail: Just, in general.
:Cueball: ...Yes?
:Doctor Ponytail: Oh no.

{{comic discussion}}

[[Category:Comics featuring Cueball]]
[[Category:Comics featuring Ponytail]]
[[Category:Doctor Ponytail]]
[[Category:Medicine]]

2620: Health Data

2022-05-18T01:47:07Z

162.158.166.183: /* Explanation */ fix link

{{comic
| number = 2620
| date = May 16, 2022
| title = Health Data
| image = health_data.png
| titletext = Donate now to help us find a cure for causality. No one should have to suffer through events because of other events.
}}

==Explanation==
{{incomplete|Created by A UNIQUE SEQUENCE OF PAST EVENTS YIELDING FURTHER INFORMATION IF INVESTIGATED - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
[[Cueball]] is at the hospital for some form of check-up. [[:Category:Doctor Ponytail|Doctor Ponytail]] comes in to inform him of the tests they have run, but her statements are frustratingly generic, and so lacking in diagnostic usefulness. She says that his "numbers" have revealed some "measurements" and "variables" but doesn't specify what they are. The fact that there are measurements and variables relate to them having been taken, but is correlated with very few outcomes other than those associated with measurement.

In response to being asked whether this is bad, she ominously says that they are the number one cause of "outcomes." This is obvious, and therefore unhelpful, since every outcome is the product of some set of variables. Additionally, outcomes can be good, bad, or indifferent, so it does not address the question.

Doctor Ponytail further states that the past is "a big contributor to" the future, a {{w|Tautology (logic)|tautological}} statement, as Cueball implies by asking whether that is just {{w|causality}}. The doctor replies ominously that causality is the leading cause of death, which is also so tautological as to be meaningless though technically correct.

Cueball tries to cut to the root of the issue by asking "what are my chances of survival?" Ponytail asks what is Cueball's family history, but rather than asking if his family has a history of similar symptoms to Cueball himself she is just asking if he has any family history whatsoever. Her apparent concern on discovering that he does is presumably due to the fact that everyone who has a family history dies, and therefore she sees this as a negative thing. However, this is not medically informative, since everyone has some kind of family history (whether they personally know anything of it or not) and everyone eventually dies.{{Citation needed}}

The comic might be making fun of poorly defined health statistics: statistics for the [https://www.gwclaw.com/blog/accidental-death-causes/ leading causes of accidental death in the United States], for example, typically cite 'poisoning' as the number one cause, even though poisoning other than drug overdoses is actually quite rare. The comic takes vague statistics to the extreme, citing 'causality' as the leading cause of death. It may also be a comment on the impenetrability of some medical diagnoses, where high levels of jargon and non-contextualised statistics, combined with a lot of hedging language, can leave patients none the wiser about their prospects, or the relative merits of various courses of treatment. Similarly, it could be reflecting on the effects of {{w|availability bias}} and the {{w|base rate fallacy}} when medical practitioners are deriving diagnoses and similar conclusions from medical records designed to highlight the information necessary to diagnose specific well-understood illnesses.

The title text continues the joke, suggesting that researchers are searching for a cure for causality, which is absurd and inconceivable.

The comic as a whole is reminiscent of [[830: Genetic Analysis]] and [[1840: Genetic Testing Results]] (particularly the title text of the latter), as the information given by the doctor in all three is self-evident and useless as a result.

==Transcript==
:[Cueball and Doctor Ponytail are talking to each other. Cueball is sitting on an examination table and Doctor Ponytail, in a doctor's coat, is looking down and reading from a clipboard with some illegible writing on it.]
:Doctor Ponytail: I'm taking a look at your numbers, and it doesn't look good.
:Doctor Ponytail: You have a lot of measurements. Quite a few variables.

:[Same setting but Doctor Ponytail looks up at Cueball.]
:Cueball: Is that... bad?
:Doctor Ponytail: Variables are the #1 risk factor for outcomes.
:Doctor Ponytail: The past is a big contributor to the future.

:[Same setting but Doctor Ponytail puts her arm with the clipboard down.]
:Cueball: Isn't that just causality?
:Doctor Ponytail: Causality is the leading cause of death in this country.

:[Same setting.]
:Cueball: So what are my odds?
:Doctor Ponytail: Do you have a family history?
:Cueball: Of what?
:Doctor Ponytail: Just, in general.
:Cueball: ...Yes?
:Doctor Ponytail: Oh no.

{{comic discussion}}

[[Category:Comics featuring Cueball]]
[[Category:Comics featuring Ponytail]]
[[Category:Doctor Ponytail]]
[[Category:Medicine]]

2620: Health Data

2022-05-18T01:46:01Z

162.158.166.183: /* Explanation */ entirely actually

{{comic
| number = 2620
| date = May 16, 2022
| title = Health Data
| image = health_data.png
| titletext = Donate now to help us find a cure for causality. No one should have to suffer through events because of other events.
}}

==Explanation==
{{incomplete|Created by A UNIQUE SEQUENCE OF PAST EVENTS YIELDING FURTHER INFORMATION IF INVESTIGATED - Please change this comment when editing this page. Do NOT delete this tag too soon.}}
[[Cueball]] is at the hospital for some form of check-up. [[:Category:Doctor Ponytail|Doctor Ponytail]] comes in to inform him of the tests they have run, but her statements are frustratingly generic, and so lacking in diagnostic usefulness. She says that his "numbers" have revealed some "measurements" and "variables" but doesn't specify what they are. The fact that there are measurements and variables relate to them having been taken, but is correlated with very few outcomes other than those associated with measurement.

In response to being asked whether this is bad, she ominously says that they are the number one cause of "outcomes." This is obvious, and therefore unhelpful, since every outcome is the product of some set of variables. Additionally, outcomes can be good, bad, or indifferent, so it does not address the question.

Doctor Ponytail further states that the past is "a big contributor to" the future, a {{w|tautology|tautological}} statement, as Cueball implies by asking whether that is just {{w|causality}}. The doctor replies ominously that causality is the leading cause of death, which is also so tautological as to be meaningless though technically correct.

Cueball tries to cut to the root of the issue by asking "what are my chances of survival?" Ponytail asks what is Cueball's family history, but rather than asking if his family has a history of similar symptoms to Cueball himself she is just asking if he has any family history whatsoever. Her apparent concern on discovering that he does is presumably due to the fact that everyone who has a family history dies, and therefore she sees this as a negative thing. However, this is not medically informative, since everyone has some kind of family history (whether they personally know anything of it or not) and everyone eventually dies.{{Citation needed}}

The comic might be making fun of poorly defined health statistics: statistics for the [https://www.gwclaw.com/blog/accidental-death-causes/ leading causes of accidental death in the United States], for example, typically cite 'poisoning' as the number one cause, even though poisoning other than drug overdoses is actually quite rare. The comic takes vague statistics to the extreme, citing 'causality' as the leading cause of death. It may also be a comment on the impenetrability of some medical diagnoses, where high levels of jargon and non-contextualised statistics, combined with a lot of hedging language, can leave patients none the wiser about their prospects, or the relative merits of various courses of treatment. Similarly, it could be reflecting on the effects of {{w|availability bias}} and the {{w|base rate fallacy}} when medical practitioners are deriving diagnoses and similar conclusions from medical records designed to highlight the information necessary to diagnose specific well-understood illnesses.

The title text continues the joke, suggesting that researchers are searching for a cure for causality, which is absurd and inconceivable.

The comic as a whole is reminiscent of [[830: Genetic Analysis]] and [[1840: Genetic Testing Results]] (particularly the title text of the latter), as the information given by the doctor in all three is self-evident and useless as a result.

==Transcript==
:[Cueball and Doctor Ponytail are talking to each other. Cueball is sitting on an examination table and Doctor Ponytail, in a doctor's coat, is looking down and reading from a clipboard with some illegible writing on it.]
:Doctor Ponytail: I'm taking a look at your numbers, and it doesn't look good.
:Doctor Ponytail: You have a lot of measurements. Quite a few variables.

:[Same setting but Doctor Ponytail looks up at Cueball.]
:Cueball: Is that... bad?
:Doctor Ponytail: Variables are the #1 risk factor for outcomes.
:Doctor Ponytail: The past is a big contributor to the future.

:[Same setting but Doctor Ponytail puts her arm with the clipboard down.]
:Cueball: Isn't that just causality?
:Doctor Ponytail: Causality is the leading cause of death in this country.

:[Same setting.]
:Cueball: So what are my odds?
:Doctor Ponytail: Do you have a family history?
:Cueball: Of what?
:Doctor Ponytail: Just, in general.
:Cueball: ...Yes?
:Doctor Ponytail: Oh no.

{{comic discussion}}

[[Category:Comics featuring Cueball]]
[[Category:Comics featuring Ponytail]]
[[Category:Doctor Ponytail]]
[[Category:Medicine]]