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[[File:xkcd_header.png|thumb|right|250px|The header segment on [[xkcd|xkcd.com]]]]
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*This page is part of the [[Design of xkcd.com]] explanation.
The '''header text''' is updated whenever [[Randall]] has news to share. However, after the novelty of the news ends, the page usually goes back to its default header text, which states:
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==Header text==
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*The header text is part of the [[Design_of_xkcd.com#Header|xkcd Header]].
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*The header text is often [[#Changes to the header text|changing]] when Randall has news to tell.  
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**But when this news wears off the page usually returns to the '''go to header text''' which is:
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***'''xkcd updates every Monday, Wednesday, and Friday.'''
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***It was last active on [http://web.archive.org/web/20190205050302/https://xkcd.com/ 2019-02-05].
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****Due to the [[How To]] book, it has no been up for a long time, and still is not on this day: 2019-08-06.
  
:xkcd updates every Monday, Wednesday, and Friday.
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===Current header text===
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*The current header text, when this section was last updated on [2019-09-06] was:  
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**Happy How To Release Day.
 +
**See more [[#2019-09-04 - Happy Release Day - bookstore|below]].
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*Usually the header text is the same for all comics.
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**But for certain comics there may be a reason to change the text permanent and as long as that is active they will not change along with the other.
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**See [[#Unique header text|Unique header text]]
  
In recent times there has been very long between the old go to text has been used for extended periods though. The most recent header text can be found at the top of the [[Header_text#Global_header_text|Global header text]] section, if it has been updated since the last change.
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===Unique header text===
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*Some comics have their own version of the header text that do not change.
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**Only when the comic is on the front page, will it also be the main header text of xkcd.
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**Put newest comic at the top
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**Here below are examples of that:
  
Usually, changes to the header text show up in all comics. However, in certain cases, the header text of a specific comic is changed permanently, which means it won't be modified like the rest of the comics. See the list of these comics [[#Comic-specific header text|here]]
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==== Seven Years====
 
 
==Comic-specific header text==
 
{{notice|'''This explanation may be incomplete or incorrect:''' This list is missing many comic-specific header texts. Don't remove this notice unless they're all mentioned here. [[Talk:header_text#1047|See the Talk page]] for some examples.<br>If you can address this issue, please '''[{{fullurl:{{{target|{{FULLPAGENAME}}}}}|action=edit}} edit the page]!''' Thanks.}}
 
 
 
When editing the section, list the changes chronologically with the date of the web archive link and hyperlink each date. Include an internal link to the comic at the time of each change and describe the modifications with relevant information. Place the most recent changes at the top.
 
 
 
===Machine===
 
*[[2916: Machine]]
 
**This comic's header mentions the people who helped put it together.
 
***It was on the front page from Saturday [https://web.archive.org/web/20240406163326/https://xkcd.com/ 2024-04-06] (although it was supposed to have been a Friday release according to the xkcd archives) until the next comic to come out Monday [ 2024-04-08] ('''has not happened yet as of this writing!'''). (It may as precious years happen very late, possibly because this was an April fools' Day comic, and Randall wished it to stay on the front page longer?) '''Again written before it happens!'''
 
****When [ ?? ] was released the front page returned to normal header. '''????'''
 
****The precious comic [[2915: Eclipse Clouds]] was still on the front page Saturday [https://web.archive.org/web/20240406053609/https://xkcd.com/ 2024-04-06]. So a very late Friday release...
 
**The text:
 
***Today's comic was created with [https://chromakode.com/ Max Goodhart], [https://github.com/spyhi Ed White], [https://twitter.com/uh_oh_thats_bad Alex Garcia], [https://twitter.com/cotrone Kevin Cotrone], [http://burningcandle.io/ Conor & Ami Stokes], [https://liranuna.com/ Liran Nuna], [https://www.instagram.com/fading_interest/ Patrick], [https://manishearth.github.io/ Manish Goregaokar], [https://github.com/benley Benjamin Staffin], [https://github.com/ayust Amber], and [https://github.com/dyfrgi Michael Leuchtenburg] with physics by [https://rapier.rs/ Rapier].
 
**It thanks those that helped Randall create that years [[:Category:April fools' comics|April fools' comic]].
 
***All have a link to their name, either to Instagram page or X or their own home pages. Some of them have also helped with the two previous April Fools' comic, see below, but there are many more involved in this one than any of the previous.
 
***Also the Fast 2D and 3D physics engine for the Rust programming language, Rapier, is mentioned as standing for the physics of the comic.
 
**Since this header was related only to the Fools' comic, it was removed from the frontpage header, when the next comic was released.
 
***But it stayed up as one of the permanent different headers on this comic, as seen two days after it stopped being on the front page on [?? 2022-04-10].
 
**See the comic on {{xkcd|2916}}.
 
 
 
===Escape Speed===
 
*[[2765: Escape Speed]]
 
**This comic's header mentions the people who helped put it together.
 
***It was on the front page from Thursday [https://web.archive.org/web/20230420203744/https://xkcd.com/ 2023-04-20] (although it was supposed to have been a Wednesday release according to the xkcd archives) until Friday [https://web.archive.org/web/20230421082400/https://xkcd.com/ 2023-04-21], when the next new comic was released (very late, possibly because this was an April fools' Day comic, and Randall wished it to stay on the front page longer?)
 
****When [[2766: Helium Reserve]] was released the front page returned to normal header. This seems to have not happened until Saturday as the earliest archive is form [https://web.archive.org/web/20230422121650/https://xkcd.com/ 2023-04-22] with the new comic.
 
**The text:
 
***Today's comic was put together with help from [https://chromakode.com/ Max Goodhart], [https://www.instagram.com/fading_interest/ Patrick Clapp], [https://amberyu.st/ Amber], [https://twitter.com/cotrone Kevin], [https://twitter.com/bstaffin Benjamin Staffin], and [https://www.aiweirdness.com/ Janelle Shane].
 
**It thanks those that helped Randall create that years [[:Category:April fools' comics|April fools' comic]].
 
***All have a link to their name, either to Instagram page or Twitter or their own home pages. Most of them have also helped with the two previous April Fools' comic, see below.
 
**Since this header was related only to the Fools' comic, it was removed from the frontpage header, when the next comic was released.
 
***But it stayed up as one of the permanent different headers on this comic, as seen two days after it stopped being on the front page on [https://web.archive.org/web/20230423150206/https://xkcd.com/2765/ 2022-04-23].
 
**See the comic on xkcd {{xkcd|2765}}.
 
 
 
===Instructions===
 
*[[2601: Instructions]]
 
**This comic's header mentions the people who helped put it together.
 
***It was on the front page from Friday [https://web.archive.org/web/20220401210146/https://xkcd.com/ 2022-04-01] until Tuesday [https://web.archive.org/web/20220405031003/https://xkcd.com/ 2022-04-05], when the next new comic was released (very late, possibly because Instructions was an April fools' Day comic, and Randall wished it to stay on the front page longer?)
 
****When [[2602: Linguistics Degree]] was released the front page returned to normal header This seems to have not happened until Tuesday as the earliest archive is form [https://web.archive.org/web/20220405125644/https://xkcd.com/ 2022-04-05] with the new comic.
 
**The text:
 
***Today's comic was created with [https://twitter.com/fadinginterest Patrick], [https://twitter.com/Aiiane Amber], [https://twitter.com/chromakode @chromakode], [https://twitter.com/dyfrgi Michael], [https://twitter.com/wirehead2501 Kat], [https://twitter.com/xDirtyPunkx Conor], [https://twitter.com/zigdon @zigdon], and [https://twitter.com/bstaffin Benjamin Staffin].
 
**It thanks those that helped Randall create that years [[:Category:April fools' comics|April fools' comic]].
 
***All have a link to their name, the first with an Instagram page, the other seven with a link to their Twitter account. Five of those also helped with the previous April Fools' comic, see below.
 
**Since this header was related only to the Fools' comic, it was removed from the frontpage header, when the next comic was released.
 
***But it stayed up as one of the permanent different headers on this comic, as seen two days after it stopped being on the front page on [https://web.archive.org/web/20220406021357/https://xkcd.com/2601/ 2022-04-06].
 
**See the comic on xkcd {{xkcd|2601}}.
 
 
 
===Checkbox===
 
*[[2445: Checkbox]]
 
**This comic's header mentions the people who helped put it together.
 
***It was on the front page from Thursday [https://web.archive.org/web/20210401232108/https://xkcd.com/ 2021-04-01] until Monday [https://web.archive.org/web/20210405130031/http://xkcd.com/ 2021-04-05], until the new comic was released on Monday.
 
**The text:
 
***This comic was put together by [https://chromakode.com/ Max Goodhart], [https://twitter.com/fadinginterest Patrick], [https://twitter.com/Aiiane Amber], [https://twitter.com/bstaffin Benjamin Staffin], [https://twitter.com/cotrone Kevin Cotrone], [https://twitter.com/wirehead2501 Kat], and [https://twitter.com/dyfrgi Michael Leuchtenburg].
 
**It thanks those that helped Randall create that years [[:Category:April fools' comics|April fools' comic]].
 
***All have a link to their name, the first with a personal home page, the other six with a link to their Twitter account. Five of those also helped with the previous April Fools' comic, see below.
 
**Since this header was related only to the Fools' comic, it was removed from the front page header, when the next comic was released, here from the day after that release Tuesday [https://web.archive.org/web/20210406143023/http://xkcd.com/ 2021-04-06].
 
**But it stayed up as one of the permanent different headers on this comic, as seen two days later on [https://web.archive.org/web/20210407203547/https://xkcd.com/2445/ 2021-04-07].
 
**See the comic on xkcd {{xkcd|2445}}.
 
 
 
===Collector's Edition===
 
*[[2288: Collector's Edition]]
 
**This comic's header mentions the people who helped put it together.
 
***It was on the front page only for about a day around April 3rd and [https://web.archive.org/web/20200404014814/http://xkcd.com/#-370,-277vApril 4th 2020].
 
**The text:
 
***Today's comic was put together by [https://chromakode.com/ Max Goodhart], [https://twitter.com/Aiiane Amber], [https://twitter.com/bstaffin Benjamin Staffin], [https://twitter.com/cotrone Kevin], [https://www.instagram.com/fading_interest/ @fading_interest], [https://twitter.com/wirehead2501 Kat], [https://twitter.com/zigdon @zigdon], and Christopher Night.
 
****All names have links except the last.
 
**It thanks those that helped Randall create the 2020 [[:Category:April fools' comics|April fools' comic]], which had taken two extra days before it was released due to the complex nature of the comic.
 
*Due to the delay the next comic, [[2289: Scenario 4]], was released already the day after the Fool's comic, even though it was thus [[2289:_Scenario_4#Trivia|on a Saturday]]!
 
**Since this header was related only to the Fools' comic, it was removed from the front page header, when the next comic was released, but it stayed up as one of the permanent different headers on this comic
 
**See the comic on xkcd {{xkcd|2288}}.
 
 
 
=== Seven Years===
 
 
*[[1928: Seven Years]]
 
*[[1928: Seven Years]]
 
**[http://web.archive.org/web/20171214171157/https://xkcd.com/ 2017-12-14]
 
**[http://web.archive.org/web/20171214171157/https://xkcd.com/ 2017-12-14]
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**The text (with link):  
 
**The text (with link):  
 
***Becky Beaton, sister of fellow cartoonist Kate Beaton, has also been diagnosed with cancer. You can support her treatment [https://www.youcaring.com/beckybeaton-1008390 here].
 
***Becky Beaton, sister of fellow cartoonist Kate Beaton, has also been diagnosed with cancer. You can support her treatment [https://www.youcaring.com/beckybeaton-1008390 here].
**{{w|Kate Beaton}} is the creator of the web comic [http://www.harkavagrant.com/ Hark! A Vagrant].  
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**{{w|Kate Beaton}} is the creator of the web comic [http://www.harkavagrant.com/ Hark! A Vagran].  
 
***Although this comic is not one on Randall's list of ''[[Design_of_xkcd.com#Comics_I_enjoy|Comics I enjoy]]'', he is clearly much influenced by another cancer diagnosis among someone in his own creative field.below.
 
***Although this comic is not one on Randall's list of ''[[Design_of_xkcd.com#Comics_I_enjoy|Comics I enjoy]]'', he is clearly much influenced by another cancer diagnosis among someone in his own creative field.below.
**On [https://web.archive.org/web/20190817141450/https://www.xkcd.com/1928/ 2019-08-17], close to two years later, the message was still there and also [https://web.archive.org/web/20211226120634/https://xkcd.com/1928/ 2021-12-26] just past four years later.  
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**On [https://web.archive.org/web/20190817141450/https://www.xkcd.com/1928/ 2019-08-17], close to two years later, the message was still there.  
 
***There was the possibility that it would be removed, when the support page was discontinued...
 
***There was the possibility that it would be removed, when the support page was discontinued...
 
***But as that already happened before [http://web.archive.org/web/20181106124430/https://www.youcaring.com/beckybeaton-1008390 2018-11-06] it seems like it will be there to stay.
 
***But as that already happened before [http://web.archive.org/web/20181106124430/https://www.youcaring.com/beckybeaton-1008390 2018-11-06] it seems like it will be there to stay.
 
***Last archived version was from [http://web.archive.org/web/20180305022301/https://www.youcaring.com/beckybeaton-1008390 2018-03-05].
 
***Last archived version was from [http://web.archive.org/web/20180305022301/https://www.youcaring.com/beckybeaton-1008390 2018-03-05].
***Randall has previously done something similar for another friend, Emiliy, but [[#2014-11-27_-_Help_Emily|that header]] was not made permanent.
 
 
**See the comic on xkcd {{xkcd|1928}}.
 
**See the comic on xkcd {{xkcd|1928}}.
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*Randall has previously done something similar for another friend, Emiliy, but [[#2014-11-27_-_Help_Emily|that header]] was not made permanent.
  
===ISS Solar Transit 2===
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====Meteorite Identification====
*[[1830: ISS Solar Transit 2]]
 
**[https://web.archive.org/web/20170428041338/https://xkcd.com/ 2017-04-28]
 
**This header links back to [[1828: ISS Solar Transit]], a comic with the same joke setup released on the Monday of the same week
 
**See the comic on xkcd {{xkcd|1830}}.
 
 
 
===Meteorite Identification===
 
 
*[[1723: Meteorite Identification]]
 
*[[1723: Meteorite Identification]]
 
**Randall realized that his comic was almost a copy of some other person. And he has since then acknowledged this on the comics specific page see more [[1723: Meteorite Identification#Trivia|here]].
 
**Randall realized that his comic was almost a copy of some other person. And he has since then acknowledged this on the comics specific page see more [[1723: Meteorite Identification#Trivia|here]].
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**See the comic on xkcd {{xkcd|1723}}.
 
**See the comic on xkcd {{xkcd|1723}}.
  
===Substitutions 3===
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==== Garden====
*[[1679: Substitutions 3]]
 
**This was the third installment of Substitutions and as he did with [[#Substitutions 2|the second]] linking to the first and telling about browser extensions for this he did the same with this one:
 
**The text:
 
***(Previously: {{xkcd|1288|Substitutions}} and {{xkcd|1625|Substitutions 2}})
 
***Note: There are various [https://chrome.google.com/webstore/detail/replacerator/gaajhenbcclienfnniphiiambbbninnp?hl=en browser extensions] for this.
 
**It was on the main page while the comic was up, for instance here on [https://web.archive.org/web/20160512102325/http://xkcd.com/ 2016-05-12].
 
**See the comic on xkcd {{xkcd|1679}}.
 
 
 
=== Garden===
 
 
*[[1663: Garden]]
 
*[[1663: Garden]]
 
**This comic had a header text to help people use the comic when it came out.  
 
**This comic had a header text to help people use the comic when it came out.  
 
**For some time this text was the main header text, but after a while is disappeared from the main header, but remained as the header for Garden.
 
**For some time this text was the main header text, but after a while is disappeared from the main header, but remained as the header for Garden.
***See more [[xkcd_Header_text#2016-04-04_-_Protip_on_Garden|below]] or on the Garden page [[Garden#Header_text_after_release|here]]
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***See more [[Garden#Header_text_after_release|here]]
 
**Today and as of the newest saved version on the archive from [http://web.archive.org/web/20161231231600/http://xkcd.com/1663/ 2016-12-31] it is still there and says:
 
**Today and as of the newest saved version on the archive from [http://web.archive.org/web/20161231231600/http://xkcd.com/1663/ 2016-12-31] it is still there and says:
 
***Protip: If you don't like how your garden is growing, you can click to prune it.  
 
***Protip: If you don't like how your garden is growing, you can click to prune it.  
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**See the comic on xkcd {{xkcd|1663}}.
 
**See the comic on xkcd {{xkcd|1663}}.
  
===Substitutions 2===
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====Na====
*[[1625: Substitutions 2]]
 
**This was the second installment of Substitutions and Randall links to the first and tells about browser extensions for this:
 
**The text:
 
***(Previously: {{xkcd|1288|Substitutions}})
 
***Note: There are various [https://chrome.google.com/webstore/detail/xkcd-substitutions/jkgogmboalmaijfgfhfepckdgjeopfhk?hl=en browser extensions] for this.
 
****He did the same when [[xkcd_Header_text#Substitutions_3|Substitutions 3]] came out, linking to the two previous.
 
**It was on the main page while the comic was up, for instance here on [https://web.archive.org/web/20160104171722/http://xkcd.com/ 2016-01-04].
 
**See the comic on xkcd {{xkcd|1625}}.
 
 
 
===United Shapes===
 
*[[1079: United Shapes]]
 
**The header was unique for this comic on the day it came out: [https://web.archive.org/web/20120709045709/http://xkcd.com:80/ 2012-07-09].
 
**The text:
 
***There's a larger version of this map [http://xkcd.com/1079/large/ here] (Colorado is [http://xkcd.com/1079/colorado/ here]).
 
***It's also available as a [https://web.archive.org/web/20120709045709/http://store.xkcd.com/xkcd/#StateMap poster].
 
**The text was never on other pages:
 
***Before US was released, also on [https://web.archive.org/web/20120709004956/http://www.xkcd.com/ 2012-07-09] the comic [[1078: Knights]] was on the main page, with the previous [[xkcd_Header_text#2012-04-09 -_Standard_text_plus_store_link|promotion of the store]].
 
***The US version was still on the front the day after [https://web.archive.org/web/20120710063424/http://xkcd.com/ 2012-07-10].
 
***But the same day [https://web.archive.org/web/20120710114846/http://xkcd.com/1078/ 2012-07-10] the page for Knights did show a new header, which may only have been active on other pages than the front on this day... See details here [[xkcd_Header_text#2012-07-10_-_New:_what-if.xkcd.com|New:_what-if.xkcd.com]]
 
****Here is another page from [https://web.archive.org/web/20120710095644/http://xkcd.com/1070/ 2012-07-10] with [[1070: Words for Small Sets]], that was also saved that day, so this was on the top of all other comics, except the front page.
 
**There are simply no version of the front page from the 11th and 12th of July 2012. But from other pages it can be shown that from the 11th there was a difference.
 
***On [https://web.archive.org/web/20120711223349/http://xkcd.com/1078/ 2012-07-11] on the page for Knights and for instance from the same day on page number [https://web.archive.org/web/20120711223339/http://xkcd.com:80/1077 1077] [[1077: Home Organization]] there is the same but new header, different than the one Knights had both two days before and the other one from the day before.
 
***And also on [https://web.archive.org/web/20120711123734/http://xkcd.com:80/1079/ 2012-07-11] the numbered page {{xkcd|1079}} for US displays a mix of this new and the unique version of the header text.
 
****It left our the part about Colorado and moved the bottom line up so the unique part is written in one line (that may still take up two lines as the text will spill over, (maybe just in some browsers?)
 
****And then it added the two lines of header text that was on all the other pages (presumably also the front page, but that was first proved with the version from [https://web.archive.org/web/20120713154207/http://xkcd.com/ 2012-07-13]).
 
****And this is the version still shown on {{xkcd|1079}} today, even though the bottom lines was a normal header that was supposed to disappear.
 
**The final text that is still on US today:
 
***There's a larger version of this map [http://xkcd.com/1079/large/ here]! It's also available as a [https://store.xkcd.com/collections/posters/products/united-shapes-poster poster].
 
***New: [https://what-if.xkcd.com/1/ what-if.xkcd.com]: abusing science to answer hypothetical questions.
 
***I'll answer a new reader question every Tuesday.
 
****Here above the link has been updated to the one in the current version, where as the above link in the original version, that is now a dead link, has been directed to an archived version of the stores poster.
 
****The link the new part is to the very first ''[[what if? (blog)|what if?]]'' article ''{{what if|1|Relativistic Baseball}}'' which was released on 2012-07-10, the day after US was released, but before the next comic [[1080: Visual Field]] was released on 2012-07-11.
 
*****There are no version of comic {{xkcd|1080}} archived while it was on the front page, so it is not possible to tell what the front page looked like on the 11th and 12th of July. But best guess is that it looked like that on Knight shown above from the 11th.
 
**The first version was on the main page while the comic was up.
 
***Maybe there was a time with the final version on the front page, but seems like Randall put the new header text there in hand, and forgot to delete it after, so he probably first changed it when the new comic came out.
 
***Since the new header was important, promoting his new ''what if'' blog, he likely did not wish to have a fairly new page (maybe even on the front page on the 10th) without the reference. Also he did not wish to remove the link to the poster in the store.
 
***But this makes it a special unique header, as a relic from the past header text is left together with the text that was supposed to be permanent. It should have been deleted when the link to ''what if'' 1 was removed.
 
**See the comic on xkcd {{xkcd|1079}}.
 
 
 
===Approximations===
 
*[[1047: Approximations]]
 
**It has a permanent text saying that many people emailed Randall about another approximation for one year than the one given in the comic.
 
***As it was already there from the release day on [https://web.archive.org/web/20120425220409/http://xkcd.com:80/ 2012-04-25] it seems unlikely that he actually received those e-mails before changing the header text for this comic!
 
**The unique text:
 
***Lots of emails mention the physicist favorite, 1 year = pi x 10<sup>7</sup> seconds.
 
***75^4 is a hair more accurate, but it's hard to top 3,141,592's elegance.
 
**There was a different header on other comics even while this comic was on the front page with the unique text. See [[#2012-04-09_-_Standard_text_plus_store_link|Plus store link]].
 
**See the comic on xkcd {{xkcd|1047}}.
 
 
 
===Umwelt===
 
*[[1037: Umwelt]]
 
**It has a permanent promotion of the store already from the release day on [https://web.archive.org/web/20120401151639/http://xkcd.com:80/ 2012-04-01]:
 
**The unique text:
 
***You can get posters, prints, and t-shirts in the [https://store.xkcd.com/ xkcd store].
 
**It stayed on the front page while this comic was the most recent, so for instance also two days later on [https://web.archive.org/web/20120403223453/http://www.xkcd.com/ 2012-04-03]
 
***There was a different header on other comics even while this comic was on the front page with the unique text. See [[xkcd_Header_text#2012-03-28_-_Visiting_Newport_News|Visiting Newport News]].
 
**See the comic on xkcd {{xkcd|1037}}.
 
 
 
===s/keyboard/leopard/===
 
*[[1031: s/keyboard/leopard/]]
 
**In response to the idea of having you browser replace keyboard with leopard a reader made a script that could do just that.
 
**Randall seem to have gotten this script before release (or at least on the day of release) as it was already the header text on [https://web.archive.org/web/20120319130702/http://xkcd.com/ 2012-03-19] the day the comic was released.
 
**The unique text is:
 
***A helpful reader has provided an [https://userscripts.org/scripts/show/128626 s/keyboard/leopard/ user script].
 
****The link does not go anywhere useful any longer, but here is the archived version of the link from two days after the release of the comic on [https://web.archive.org/web/20120321174019/http://userscripts.org/scripts/show/128626 2012-03-21]
 
**It was never changed on the other comics so was only on the front while this comic was up until 2012-03-21
 
***Here also shown on the second day it was up on its own page on [https://web.archive.org/web/20120320143916/http://xkcd.com:80/1031/ 2012-03-20].
 
**The next comic [[1032: Networking]] came out on [https://web.archive.org/web/20120321205835/http://xkcd.com:80/ 2012-03-21] and here the header text has returned to what it was before the leopard comic: [[xkcd_Header_text#2012-03-12_-_xkcd_Holistic_Browser|xkcd Holistic Browser]].
 
***Here are examples from dates around this showing it was not used on other pages:
 
****The last archived version of the front page from before the 19th was this version from [https://web.archive.org/web/20120317121834/http://xkcd.com:80/ 2012-03-17], but here is an example from [https://web.archive.org/web/20120318153256/http://xkcd.com:80/1030/ 2012-03-18] (from comic [[1030: Keyed]]), the day before leopard comic came out.
 
****Both on [https://web.archive.org/web/20120319174700/http://xkcd.com/1030/ 2012-03-19] (from comic [[1030: Keyed]]) and on [https://web.archive.org/web/20120320191039/http://xkcd.com:80/1012 2012-03-20] (from comic [[1012: Wrong Superhero]]) during the time leopard was up, the header text currently in used was still shown.
 
**See the comic on xkcd {{xkcd|1031}}.
 
 
 
===Making Things Difficult===
 
*[[996: Making Things Difficult]]
 
**Randall links to a blog post about cancer as related to this cancer comic
 
**The unique text:
 
***Some context for the cancer comics:
 
***[https://blog.xkcd.com/2011/06/30/family-illness/ https://blog.xkcd.com/2011/06/30/family-illness/]
 
****The link is for post on his [[Blag]].
 
****It is on the oldest stored version from [https://web.archive.org/web/20111229043804/http://xkcd.com:80/ 2011-12-29] when it was on the header.
 
**See the comic on xkcd {{xkcd|996}}.
 
 
 
===Money===
 
*[[980: Money]]
 
**Randall notes his thoughts about making it and makes a promotion of the poster.
 
**The unique text:
 
***This one was fun (and exhausting) to make.
 
***There's a poster of it in the [https://store.xkcd.com/products/money-poster store]!
 
****It is both at the oldest stored version from [https://web.archive.org/web/20120404110059/http://xkcd.com:80/980 2012-04-04] and the newest at time of editing [https://web.archive.org/web/20220108132250/https://xkcd.com/980/ 2022-01-08].
 
**See the comic on xkcd {{xkcd|980}}.
 
 
 
===Map Projections===
 
*[[977: Map Projections]]
 
**Randall notes that a person had birthday on the release of this comic about maps, and this guy has maps on his homepage
 
**The unique text:
 
***It turns out Monday was Steve Waterman's birthday. His [https://web.archive.org/web/20111118003418/http://www.watermanpolyhedron.com/ site] has posters of his map, plus maybe the world's only Winkel Tripel-critiquing poetry.
 
****The link goes to [http://www.watermanpolyhedron.com/ Waterman project] home page. Above the link goes to an archived version from around the time of release of the header text.
 
****It is at the oldest stored version with the comic on the front page on [https://web.archive.org/web/20111115231643/http://xkcd.com:80/ 2011-11-15].
 
**See the comic on xkcd {{xkcd|977}}.
 
 
 
===Na===
 
 
*[[851: Na]]
 
*[[851: Na]]
 
**After Randall made this comic, he realized he could have "made it better" and changed the header text to:
 
**After Randall made this comic, he realized he could have "made it better" and changed the header text to:
Line 235: Line 62:
 
**See the comic on xkcd {{xkcd|851}}.
 
**See the comic on xkcd {{xkcd|851}}.
  
===Malamanteau===
+
====<span style="color:blue">House</span> of Pancakes====
*[[739: Malamanteau]]
 
**Randall notices that he has changed this comics license, so it can be used on Wikipedia.
 
**The text:
 
***At Wikipedia's request, I release this comic under a [https://creativecommons.org/licenses/by-sa/3.0/us/ cc-by-sa] license.
 
****The link is to the page regarding {{w|Creative Commons license}} in the US.
 
****Specifically for Attribution-ShareAlike 3.0 United States (CC BY-SA 3.0 US)
 
*****Usually xkcd is [[Design_of_xkcd.com#License_and_copyright|shared under]] [http://creativecommons.org/licenses/by-nc/2.5/ Creative Commons Attribution-NonCommercial 2.5 License]. This does not allow commercial use, But the 3.0 does.
 
**When the comic came out it had the normal header text from that time, as seen here two days after release on [https://web.archive.org/web/20100514072436/http://xkcd.com/ 2010-05-14].
 
***First archived version with the unique text is from [https://web.archive.org/web/20100913003146/http://xkcd.com/739/ 2010-09-13], but the previous archived version of this comic is from [https://web.archive.org/web/20100713160533/http://xkcd.com:80/739/ 2010-07-13].
 
***So it happened somewhere in the two months in between. But at least it was not there the first two months after release, but there before four month after release.
 
**See the comic on xkcd {{xkcd|739}}.
 
 
 
===Steal This Comic===
 
*[[488: Steal This Comic]]
 
**Randall is tired of {{w|DRM}}, an acronym standing for Digital Rights Management. This comic displays this. He thus make a promotion of Amazon that sells music without DRM.
 
**The text:
 
***Note: the [https://www.amazon.com/MP3-Music-Download/b?ie=UTF8&node=163856011 Amazon.com MP3 store] sells DRM-free music. Kudos.
 
****The link is to Amazon MP3 music. Here is an archived version from [https://web.archive.org/web/20081001083843/http://www.amazon.com/MP3-Music-Download/b?ie=UTF8&node=163856011 2008-10-01], two weeks prior to the release of the comic.
 
**The header text was on the comic from the release day, here seen the day after on the first archived version from [https://web.archive.org/web/20081014232952/http://xkcd.com/ 2008-10-14].
 
**See the comic on xkcd {{xkcd|488}}.
 
 
 
===<span style="color:blue">House</span> of Pancakes===
 
 
*[[472: House of Pancakes]]
 
*[[472: House of Pancakes]]
 
**This comic's header notes its status as a parody:
 
**This comic's header notes its status as a parody:
Line 265: Line 70:
 
**See the comic on xkcd {{xkcd|472}}.
 
**See the comic on xkcd {{xkcd|472}}.
  
==Global header text==
+
===Changes to the header text===
When editing the section, list the changes chronologically with the date of the web archive link and hyperlink each date. Include an internal link to the newest comic at the time of each change and describe the modifications with relevant information. Position the last comic displaying the header text below the other data and place the most recent change at the top.
+
*The header text changes often.  
 
+
**Here these changes can be listed
===2024-03-20 - What If? is on YouTube!===
+
**Begin with the date of the web archive link and make the date a link.  
*[http://web.archive.org/web/20240320173158/https://xkcd.com/ 2024-03-20]
+
**Link to the comic that was on the front page when the text changed
**[[2909: Moon Landing Mission Profiles]] came out when the header changed.
+
**Then describe the changes and put in text if possible
*The only text version from the previous header was trimmed having some words removed taking it down from four to three lines (and solving the bad alignment that happened five days before at the end of the previous header text).
+
**Also the comic that was the last to feature a message would be interesting to have below the other data.
**The text:
+
**Put the newest (current) version at the top.
***[https://what-if.xkcd.com/ What If?] is on YouTube! The first video answers
 
***“[https://www.youtube.com/watch?v=2LSyizrk8-0 What if we aimed Hubble at Earth?]” Follow the
 
***[https://www.youtube.com/@xkcd_whatif What If?] channel to be notified about new videos.
 
**The links goes to the what if page on xkcd and the other two links is to the YouTube channel with videos of some of the what if articles and to the very first video.
 
*The promotion of the what if? franchise continues for the second year running. A few words was taken of as it could no longer be said to be new that there was a YouTube channel.
 
*This version is the current header text as of April 7th 2024.
 
 
 
===2023-11-29 - What If? is now on YouTube!===
 
*[http://web.archive.org/web/20231129184009/https://xkcd.com/ 2023-11-29]
 
**[[2861: X Value]] came out when the header changed.
 
*There was only text this time.
 
**The text:
 
***[https://what-if.xkcd.com/ What If?] is now on YouTube!
 
***Check out the first video for the answer to
 
***“[https://www.youtube.com/watch?v=2LSyizrk8-0 What if we aimed the Hubble Telescope at Earth?]”
 
***and follow [https://www.youtube.com/@xkcd_whatif xkcd’s What If? The Video Series channel] to be notified about each new video.
 
**The links goes to the what if page on xkcd and the other two links is to the new YouTube channel with videos of some of the what if articles and to the very first video.
 
*This is thus not a promotion of the what if? 2 book but stil promotion of the what if? franchise.
 
*A small change happened on [http://web.archive.org/web/20240314113602/https://xkcd.com/ 2024-03-14], as the first two lines became one line which made the alignment worse. So it seemed strange to do this. It looked like normal up until [http://web.archive.org/web/20240313113429/https://xkcd.com/ 2024-03-13]. But it only lasted five days before a change was made that made it into a new although very similar header text.
 
*This version ended on [http://web.archive.org/web/20240319134138/https://xkcd.com/ 2024-03-19], while [[2908: Moon Armor Index]] was on the front page, but was replaced by a very similar What If? header.
 
  
===2023-08-31 - What if? 2 is now available in paperback in the UK!===
+
====2019-09-11 - How To available====
*[http://web.archive.org/web/20230831200321/https://xkcd.com/ 2023-08-31]
 
**[[2822: *@gmail.com]] came out when the header changed.
 
**The image to the right stayed, but after more than a half year with no text, text was added to the left of the picture because the paper back was available in the UK.
 
***As opposed to the previous headers this was plain text and not a picture.
 
***The image is taken from the front cover of the new book, with red background, showing a passenger plane taking off with the wheels still down. On top of it a Tyrannosaurus Rex has begun eating its way into the plane. Below the plane is the book title in white text.
 
**The text:
 
***What if? 2 is [https://xkcd.com/what-if-2/#UK now available] in paperback in the UK!
 
***what if? 2
 
**The link goes to https://xkcd.com/what-if-2/#UK, the page on xkcd about the What if? 2 book, and directing to the UK order links where there now also it a paper back version.
 
*This version was still up in the middle of November 2023 when this segment was updated.
 
*This version ended on [http://web.archive.org/web/20231128174224/https://xkcd.com/ 2023-11-28], while [[2860: Decay Modes]] was on the front page, but was replaced by another What If? header.
 
**Although it was not specifically related to the new book. Thus it ended a more than 22 month long constant promotion of the book since the [[#2022-01-10_-_Standard_text_with_countdown|countdown]] began in January 2022.
 
 
 
===2023-02-17 - What if? 2 picture only===
 
*[http://web.archive.org/web/20230217185629/https://xkcd.com/ 2023-02-17]
 
**[[2739: Data Quality]] came out when the header changed.
 
**For the first time in a very long time there is no real header text. Only the small red picture with the plane and the title of the what if? 2 book in the right section of the header. As it has been since [[#2022-01-10 - Standard text with countdown|the countdown]] stopped.
 
***The image is taken from the front cover of the new book, with red background, showing a passenger plane taking off with the wheels still down. On top of it a Tyrannosaurus Rex has begun eating its way into the plane. Below the plane is the book title in white text.
 
**The text:
 
***what if? 2
 
*This version ended on [http://web.archive.org/web/20230830064414/https://xkcd.com/ 2023-08-30], while [[2821: Path Minimization]] was on the front page, but was replaced by another What If? 2 header.
 
 
 
===2022-09-23 - What if? 2 Instant New York Times Bestseller===
 
*[https://web.archive.org/web/20220923182825/https://xkcd.com/ 2022-09-23]
 
**[[2675: Pilot Priority List]] was on the front page when the header changed.
 
***The header celebrates that the new what if? 2 book has become an instant New York Times bestseller.
 
**The header kept the same layout as the previous and thus still consist of two parts. With the right picture the window also used in [[#2022-01-10 - Standard text with countdown|the countdown]], but with the image that appeared in it after the count down ended.
 
***The image is taken from the front cover of the new book, with red background, showing a passenger plane taking off with the wheels still down. On top of it a Tyrannosaurus Rex has begun eating its way into the plane. Below the plane is the book title in white text.
 
**The new image to the left has a black border. To the left is still the picture of the new what if? 2 book. It has the same image as in the picture to the right, but showing the entire front of the book, with details of those looking up at the plane from the ground. The title and the author name can be read in white on the red book. There are also unreadable white text above the plane and below the author name. The spine of the book can also be seen, as the book is seen a bit from the side. Here are also unreadable white text. To the right of the book there are two lines of text, with the first line in very large bold letters.
 
**The text:
 
***what if? 2
 
***Randall Munroe
 
***What if? 2
 
***Instant New York Times bestseller.
 
***what if? 2
 
****Both images are links that goes to a dedicated page on xkcd about [https://xkcd.com/what-if-2/ what if? 2: the book].
 
*This version ended on [http://web.archive.org/web/20230216181705/https://xkcd.com/ 2023-02-16], while [[2738: Omniknot]] was on the front page, but was replaced by another What If? 2 header,
 
 
 
===2022-09-13 - What if? 2 is available now===
 
*[https://web.archive.org/web/20220913142432/https://xkcd.com/ 2022-09-13]
 
**[[2672: What If? 2 Flowchart]] was released as the header changed, even though it was a Tuesday.
 
***The header and the comic celebrates the release of the new what if? 2 book, that came out on this day.
 
**The header kept the same layout as the previous and thus still consist of two parts. With the right picture the window also used in [[#2022-01-10 - Standard text with countdown|the countdown]], but with the image that appeared in it after the count down ended.
 
***The image is taken from the front cover of the new book, with red background, showing a passenger plane taking off with the wheels still down. On top of it a Tyrannosaurus Rex has begun eating its way into the plane. Below the plane is the book title in white text.
 
**The new image to the left has a black border. To the left is still the picture of the new what if? 2 book. It has the same image as in the picture to the right, but showing the entire front of the book, with details of those looking up at the plane from the ground. The title and the author name can be read in white on the red book. There are also unreadable white text above the plane and below the author name. The spine of the book can also be seen, as the book is seen a bit from the side. Here are also unreadable white text. To the right of the book there are two lines of text, with the first line in very large bold letters
 
**The text:
 
***what if? 2
 
***Randall Munroe
 
***What if? 2 is available now!
 
***what if? 2
 
****Both images are links that goes to a dedicated page on xkcd about [https://xkcd.com/what-if-2/ what if? 2: the book].
 
*This thus ended the pre-release promotion of the book, that began on [[#xkcd_Header_text#2022-01-31_-_What_if.3F_2|2022-01-31]], plus of course the three weeks of [[#2022-01-10 - Standard text with countdown|countdown]] before. For a sum total of 8 months and three days.
 
**It will be interesting to see how long before any reference to what if? 2 will disappear from the header text.
 
*This version ended on [https://web.archive.org/web/20220922150042/https://xkcd.com/ 2022-09-22], but was replaced by another What If? 2 header, while [[2675: Pilot Priority List]] was on the front page.
 
 
 
===2022-09-12 - One day to What if? 2 comes out===
 
*[https://web.archive.org/web/20220912125617/https://xkcd.com/ 2022-09-12]
 
**This was while [[2670: Interruption]] was still up.
 
**The header is the same layout as the previous and thus still consist of two parts. With the right picture the window also used in [[#2022-01-10 - Standard text with countdown|the countdown]], but with the image that appeared in it after the count down ended.
 
***The image is taken from the front cover of the new book, with red background, showing a passenger plane taking off with the wheels still down. On top of it a Tyrannosaurus Rex has begun eating its way into the plane. Below the plane is the book title in white text.
 
**The new image to the left has a black border. To the left is still the picture of the new what if? 2 book. It has the same image as in the picture to the right, but showing the entire front of the book, with details of those looking up at he plane from the ground. The title and the author name can be read in white on the red book. There are also unreadable white text above the plane and below the author name. The spine of the book can also be seen, as the book is seen a bit from the side. Here are also unreadable white text. To the right of the book there are three lines of text. With the first line written in large bold letters. This also has a footnote star. And the footnote is then written to the right in smaller font over five lines of text.
 
**The text:
 
***what if? 2
 
***Randall Munroe
 
***One day* until what if? 2 comes out!
 
***<nowiki>*</nowiki>I'm going to spend the day with that Les Mis song stuck in my head, aren't I.
 
***what if? 2
 
****Both images are links that goes to a dedicated page on xkcd about [https://xkcd.com/what-if-2/ what if? 2: the book].
 
**The foot note refers to the [[2636: What If? 2 Countdown]]. For the date where the header changed 2022-09-12 it was ''F(99) where F(N) means sing all the verses of N Bottles of Beer On the wall followed by F(N-1)'' to release day.
 
***It is thus for certain this song Randall mentions will now be stuck in his head.
 
***Les mis song, probably meaning les miserables song, as in a horrible song, he now has stuck in his head for an entire day.
 
**The header stayed the same until [https://web.archive.org/web/20220913134002/https://xkcd.com/ 2022-09-13].
 
***This was while [[2671: Rotation]] was still up, early on the release day of the new book.
 
 
 
===2022-09-12 - Three days to What if? 2 comes out===
 
*[https://web.archive.org/web/20220911102450/https://xkcd.com/ 2022-09-11]
 
**This was while [[2670: Interruption]] was still up.
 
**The header is the same layout as the previous and thus still consist of two parts. With the right picture the window also used in [[#2022-01-10 - Standard text with countdown|the countdown]], but with the image that appeared in it after the count down ended.
 
***The image is taken from the front cover of the new book, with red background, showing a passenger plane taking off with the wheels still down. On top of it a Tyrannosaurus Rex has begun eating its way into the plane. Below the plane is the book title in white text.
 
**The new image to the left has a black border. To the left is still the picture of the new what if? 2 book. It has the same image as in the picture to the right, but showing the entire front of the book, with details of those looking up at he plane from the ground. The title and the author name can be read in white on the red book. There are also unreadable white text above the plane and below the author name. The spine of the book can also be seen, as the book is seen a bit from the side. Here are also unreadable white text. To the right of the book there are three lines of text. With the first line written in large bold letters. This also has a footnote star. And the footnote is then written to the right in smaller font over five lines of text.
 
**The text:
 
***what if? 2
 
***Randall Munroe
 
***Three days* until what if? 2 comes out!
 
***<nowiki>*</nowiki>Assuming it's still Saturday. I'm a static png image and can't perceive time.
 
***what if? 2
 
****Both images are links that goes to a dedicated page on xkcd about [https://xkcd.com/what-if-2/ what if? 2: the book].
 
**The header only stayed the same for one day and [[2670: Interruption]] was still up when it changed to the next.
 
 
 
===2022-09-07 - Less than one week to What if? 2 comes out===
 
*[https://web.archive.org/web/20220907211736/https://xkcd.com/ 2022-09-07]
 
**This was while [[2668: Artemis Quote]] was still up.
 
**The header still consist of two parts. With the right picture the window also used in [[#2022-01-10 - Standard text with countdown|the countdown]], but with the image that appeared in it after the count down ended.
 
***The image is taken from the front cover of the new book, with red background, showing a passenger plane taking off with the wheels still down. On top of it a Tyrannosaurus Rex has begun eating its way into the plane. Below the plane is the book title in white text.
 
**The new image to the left has a black border. To the left is still the picture of the new what if? 2 book. It has the same image as in the picture to the right, but showing the entire front of the book, with details of those looking up at he plane from the ground. The title and the author name can be read in white on the red book. There are also unreadable white text above the plane and below the author name. The spine of the book can also be seen, as the book is seen a bit from the side. Here are also unreadable white text. To the right of the book there are four lines of text. With the middle line written in large bold letters. This also has a footnote star. And the footnote is then written to the right in smaller font over four lines of text.
 
**The text:
 
***what if? 2
 
***Randall Munroe
 
***Less than one week* until what if? 2 comes out!
 
***<nowiki>*</nowiki>Oh no, now I have that song stuck in my head.
 
***what if? 2
 
****Both images are links that goes to a dedicated page on xkcd about [https://xkcd.com/what-if-2/ what if? 2: the book].
 
**The foot note refers to the [[2636: What If? 2 Countdown]]. For the date where the header changed 2022-09-07 it was ''one pico-universe-lifetime'' to release day. But the next day 2022-09-08 it was ''The Baby Shark chorus for a family of 50,000 sharks''.
 
***It is thus for certain this song Randall mentions will now be stuck in his head.
 
**The header stayed the same until [https://web.archive.org/web/20220910024549/https://xkcd.com/ 2022-09-10].
 
***This was while [[2670: Interruption]] was up.
 
 
 
===2022-08-27 - Preorder What if? 2 - with image - again===
 
*[https://web.archive.org/web/20220827232205/https://xkcd.com/ 2022-08-27]
 
**[[2664: Cloud Swirls]] came out when it changed.
 
**The header [[#2022-08-16 - Preorder What if? 2 - with image|changed back]] to the preorder image from the previous header, when Randall's book tour ended. See the link.
 
*It ended on [https://web.archive.org/web/20220906191403/https://xkcd.com/ 2022-09-06].
 
**This was while [[2668: Artemis Quote]] was up.
 
 
 
===2022-08-17 - What if? 2 book tour===
 
*[https://web.archive.org/web/20220817161136/https://xkcd.com/ 2022-08-17]
 
**[[2659: Unreliable Connection]] was out when it changed.
 
**The header still consist of two parts. With the right picture the window also used in [[#2022-01-10 - Standard text with countdown|the countdown]], but with the image that appeared in it after the count down ended.
 
***The image is taken from the front cover of the new book, with red background, showing a passenger plane taking off with the wheels still down. On top of it a Tyrannosaurus Rex has begun eating its way into the plane. Below the plane is the book title in white text.
 
**The new image to the left has a black border. Inside this there is text to the left. Then Cueball is seen flying by holding on to a single balloon (like in [[1110: Click and Drag]]). He flies over five mountain peaks with snow, with three clouds and three distant birds in front of him, as he drifts to the right, as shown with movements lines behind him. In front of him is a dark feature at the bottom of the frame. Above this is a blue square (like a button) with white text.
 
**The text:
 
***I'm going on a what if? 2 book tour!
 
***Click to see where
 
***what if? 2
 
****The image to the left is a link to [https://xkcd.com/events/ randall munroe: events] page on xkcd. Which at the time showed the calendar with the planned stop for his book tour, which covered the US and London.
 
****As always the link button in blue is not the only part of the image that is a link, as he just mentioned in the [[#2022-08-11 - Preorder What if? 2 - with image|previous header text]], and several times before...
 
****The right image is a link that goes to a dedicated page on xkcd about [https://xkcd.com/what-if-2/ what if? 2: the book].
 
*This header thus continues the promotion of the new book, which was at the time was only 27 days away (or [[2636:_What_If%3F_2_Countdown|6 dog months]]).
 
**It will be interesting to see how long it takes before promotion for the book disappears from the header. It may still take months.
 
*The header stayed the same until [https://web.archive.org/web/20220826202043/https://xkcd.com/ 2022-08-26].
 
**This was while [[2663: Tetherball Configurations]] was up.
 
 
 
===2022-08-11 - Preorder What if? 2 - with image===
 
*[https://web.archive.org/web/20220811055445/https://xkcd.com/ 2022-08-11]
 
**[[2657: Complex Vowels]] came out as it changed.
 
*The message in the header was not really changed, but the meaning of the text from the previous header was now written in an image, although the text did change somewhat.
 
**The header thus still consist of two parts. To the left the new image with an picture of the book and text. And to the right the window also used in [[#2022-01-10 - Standard text with countdown|the countdown]], but with the image that appeared in it after the count down ended.
 
***The image is taken from the front cover of the new book, with red background, showing a passenger plane taking off with the wheels still down. On top of it a Tyrannosaurus Rex has begun eating its way into the plane. Below the plane is the book title in white text.
 
**The new image to the left has a black border. Inside this to the right is the new text. To the left is a picture of the new what if? 2 book. It has the same image as in the picture to the right, but showing the entire front of the book, with details of those looking up at he plane from the ground. The title and the author name can be read in white on the red book. There are also unreadable white text above the plane and below the author name. The spine of the book can also be seen, as the book is seen a bit from the side. Here are also unreadable white text.
 
**The text:
 
***what if? 2
 
***Randall Munroe
 
***Preorder what if? 2 and enter for a chance to win a comic inspired by your question! Click here to learn more. Or click wherever. This whole image is a link because html is hard.
 
***what if? 2
 
****In the left image there is a blue link font on the word "here" in click here. However the entire left image is a link to the [https://sites.prh.com/whatif2 what if 2 contest]. As explained he did not only make the word a link because html is hard! This is something Randall [[xkcd_Header_text#2014-07-23_-_what_if.3F_book_tour|often comments on]].
 
*****The link in the text goes to a contest page that starts with the words:
 
*****[https://web.archive.org/web/20220718171904/https://sites.prh.com/whatif2 Want Randall Munroe to answer you What If? question?]
 
*****Here above the web archive version of the link, in case the link from the text goes dead in the future.
 
****The right image is a link that goes to a dedicated page on xkcd about [https://xkcd.com/what-if-2/ what if? 2: the book].
 
**The header stayed the same until [https://web.archive.org/web/20220816124823/https://xkcd.com/ 2022-08-16].
 
***This was while [[2659: Unreliable Connection]] was up.
 
 
 
===2022-07-19 - Preorder What if? 2===
 
*[https://web.archive.org/web/20220719153239/https://xkcd.com/ 2022-07-19]
 
**[[2647: Capri Suns]] came out as it changed.
 
*The header looked a lot like the previous one, only part of the text changed.
 
**The header thus still consist of two part. To the left a line of text (split up, most likely over four lines for most users). And to the right the window also used in [[#2022-01-10 - Standard text with countdown|the countdown]], but with the image that appeared in it after the count down ended.
 
***The image is taken from the front cover of the new book, with red background, showing a passenger plane taking off with the wheels still down. On top of it a Tyrannosaurus Rex has begun eating its way into the plane. Below the plane is the book title in white text.
 
**The text:
 
***Preorder What If? 2 (all US preorders eligible) and [https://sites.prh.com/whatif2 enter our contest] for a chance to win a dedicated comic and What If blog post!
 
***what if? 2
 
****The image is a link that goes to a dedicated page on xkcd about [https://xkcd.com/what-if-2/ what if? 2: the book].
 
***The link in the text goes to a contest page that starts with the words:
 
****[https://web.archive.org/web/20220718171904/https://sites.prh.com/whatif2 Want Randall Munroe to answer you What If? question?]
 
****Here above the web archive version of the link, in case the link from the text goes dead in the future.
 
**The header stayed the same until [https://web.archive.org/web/20220810034709/https://xkcd.com/ 2022-08-10].
 
***This was while [[2656: Scientific Field Prefixes]] was up.
 
 
 
===2022-01-31 - What if? 2===
 
*[https://web.archive.org/web/20220201000434/https://xkcd.com/ 2022-02-01]
 
**[[2575: What If? 2]] came out as it changed, and then it [https://www.explainxkcd.com/wiki/images/3/36/Countdown_in_header_text_page_when_what_if_comic_came_out.png looked like this] already on 2022-01-31. But there is no archived version from that day after the header changed.
 
***This was what [[#2022-01-10 - Standard text with countdown|the countdown]] had been counting down to.
 
***An announcement that Randall had written a sequel to the first ''[[What If? (book)|What If?]]'' book, based on his blog.
 
**The header consist of two part. To the left a line of text (split up, most likely over three lines for most users). And to the right the window also used in the countdown, but with the image that appeared in it after the count down ended.
 
***The image is taken from the front cover of the new book, with red background, showing a passenger plane taking off with the wheels still down. On top of it a Tyrannosaurus Rex has begun eating its way into the plane. Below the plan ia the book title in white text.
 
**The text:
 
***What If? 2: Additional Serious Scientific Answers to Absurd Hypothetical Questions comes out 9/13. Preorder [https://xkcd.com/what-if-2/ here!]
 
***What If? 2:
 
****The link goes to a dedicated page on xkcd about what if? 2: the book. The image is also a link to this page.
 
****The entire comic that came out along with the new header text is also a link to that page.
 
**At the same time the [[Design_of_xkcd.com#xkcd_links|xkcd links]] in the top left section of xkcd also changed to include links to books, and especially this new book.
 
*It will be interesting to see how long this version of the promotion for the new books stays up. But most likely there will be promotion for the book until release, and then more after the release.
 
**The header stayed the same until [https://web.archive.org/web/20220718145816/https://xkcd.com/ 2022-07-18], for more than 5,5 month. This was while [[2646: Minkowski Space]] was up.
 
***The change was rather small, but part of the text changed. The promotion continued though.
 
 
 
===2022-01-10 - Standard text with countdown===
 
*[https://web.archive.org/web/20220110183238/https://xkcd.com/ 2022-01-10].
 
**[[2565: Latency]] was still up when the [[Countdown in header text]] was added.
 
**The text was still the standard xkcd header: xkcd updates every Monday, Wednesday, and Friday.
 
**But a countdown was added. This was inserted in a rectangular box, placed at the end of the standard header text.
 
***In some browsers the box forces the last word "Friday" to jump down to the next line.
 
**Inside the box the following time was displayed in the version in the link:
 
***20d 20h 27m
 
****This clock will also count down every minute, although it will return to the time at the time of archive when reloaded!
 
****While this was edited into this wiki the time had changed to 20d 19h 12m. So it was a very fresh download in the web archive, only about 1 hour old when it was updated to this wiki.
 
****The minutes change without refreshing the page, and follows this editors computers clock exactly, so it will end at 59 minutes, not at a full hour.
 
***It looks like it started on [https://munvoseli.github.io/xkcd-countdown/ 01-10 17:00 UTC].
 
****A calculation shows that this countdown will reach zero on Monday 2022-01-31 at 14:59 (2:59 PM) {{w|UTC}}.
 
****This will be at 9:59 (9:59 AM) in [[Randall]]'s home town
 
*****The last ten minutes it switched to seconds for the last minute so it made the switch 15:00 UTC 10:00 in Boston!
 
****From that it can be deduced that the count started at 20d 22h 0m
 
*****The first image on the archive thus came 1h 33m after the count began.
 
**At [https://web.archive.org/web/20220111153818/https://xkcd.com/ 2022-01-11] a diagonal black bar appeared in the lower left-hand corner of the countdown box.
 
***After that the [[Countdown in header text]] page was created and any further development on the count down will be mentioned on that page.
 
*It was last up on [https://web.archive.org/web/20220131124817/https://xkcd.com/ 2022-01-31] when [[2574: Autoresponder]] was on the front page.
 
**This archived version was when the counter was at 0d 2h 11m, and the last normal frame was already up at this time.
 
***It stayed like this until the [https://www.explainxkcd.com/wiki/images/1/17/Countdown_in_header_text_page_0_seconds.png counter ran out].
 
****Then for a few minutes the final frame, that revealed that all this was a promotion for Randall's new book what if? 2 was up [https://www.explainxkcd.com/wiki/images/4/48/Countdown_in_header_text_page_just_after_countdown.png while the Friday comic was still up].
 
****Then when the new Monday comic came out with the promotion for what if? 2, the header changed.
 
 
 
===2022-01-08 - Back to standard text===
 
*[https://web.archive.org/web/20220108044654/https://xkcd.com/ 2022-01-08].
 
**[[2565: Latency]] came out around the time the new header text appeared, on a Friday!
 
**The text returned to the standard xkcd header:
 
***xkcd updates every Monday, Wednesday, and Friday.
 
**This was the first time since [[#2018-11-07 - Back to standard text|2018-11-07]] that the text had changed back to that, and at that time it lasted until 2019-02-05.
 
***That is 1067 days (less than a month short of three years) without the standard text! (Can it be called standard anymore?)
 
**It was only left in the complete standard version until [https://web.archive.org/web/20220109030513/https://xkcd.com/ 2022-01-09] when Latency was still on the front page.
 
***Then the next day a [[#2022-01-10 - Standard text with countdown|countdown]] was added to it.
 
****That was after the weekend on Monday but before the Monday comic came up.
 
****So only during the weekend was it normal standard header text.
 
 
 
===2021-12-20 - What If in stock===
 
*[https://web.archive.org/web/20211220211220/https://xkcd.com/ 2021-12-20].
 
**[[2557: Immunity]] came out around the time the new header text appeared.
 
**The text:
 
***For anyone trying to find What If? this year, it's in stock at [https://www.barnesandnoble.com/w/what-if-serious-scientific-answers-to-absurd-hypothetical-questions-randall-munroe/1118864093 Barnes & Noble], [https://m.booksamillion.com/p/What-If/Randall-Munroe/9780544272996 Books-a-Million], and [https://bookshop.org/books/what-if-serious-scientific-answers-to-absurd-hypothetical-questions-9781483041827/9780544272996 Bookshop]
 
**Each store name is a link to the corresponding store's page for ''[[What If? (book)|What If?]]''.
 
*It was last seen on [https://web.archive.org/web/20220106100957/https://xkcd.com/ 2022-01-06] when [[2564: Sunshield]] was up.
 
 
 
===2020-06-03 - Black Lives Matter===
 
*[https://web.archive.org/web/20200604003700/http://xkcd.com/ 2020-06-03].
 
**[[2315: Eventual Consistency]] came out as a new header text was finally inserted after almost two months without one.
 
**Cueball is standing to the left and speaks a single line of text: "Black Lives Matter"
 
**To the right is a gray link button with text: "[https://www.joincampaignzero.org/ How To Help]."
 
**As always, the entire image (which is only below the xkcd logo) is a link
 
***The button is thus not needed, but it will also work when clicking the location of the button.
 
**The link goes to [https://www.joincampaignzero.org/ Join Campaign Zero].
 
***{{w|Black Lives Matter}} is a loose, grassroots, decentralized confederation of groups and individuals advocating for racial justice. It arose in 2013 after the acquittal of {{w|George Zimmerman}}, who took the life of {{w|Trayvon Martin}}.
 
***Randall's featuring Black Lives Matter came on the heels of the {{w|Killing of George Floyd}} on May 25th 2020, which had sparked {{w|George Floyd protests|protest in the US}}
 
***Floyd died while saying "{{w|I can't breathe}}," which was already used due to other Black men's killings, the first was from the {{w|Killing of Eric Garner}}, back in 2014.
 
*It stayed like this until [https://web.archive.org/web/20200616114945/https://xkcd.com/ 2020-06-16] when [[2320: Millennium Problems]] was up.
 
**Then on [https://web.archive.org/web/20200617131438/https://xkcd.com/ 2020-06-17] the link changed to [https://blacklivesmatter.com/ Black Lives Matter]. [[2320: Millennium Problems]] was still on the front page on that day.
 
*On April 1st 2021 the front page header changed to mention who made the April Fools' comic.
 
**But this was only for this comic [[#Checkbox|Checkbox]].
 
**The rest of the pages kept the BLM header and it returned to this on the front page once the next comic was released on April 5th. At that time it will have been up for 13 months, making it the longest header different from the standard header.
 
*It was last up on [https://web.archive.org/web/20211219202204/https://xkcd.com/ 2021-12-19] when [[2556: Turing Complete]] was on the front page.
 
**At that time it had been up for 564 days or 1,5 year plus 16 days! This is most likely a record.
 
 
 
===2020-04-05 - Empty header===
 
*[https://web.archive.org/web/20200405042955/https://xkcd.com/ 2020-04-05].
 
**[[2289: Scenario 4]] came out and the header belonging to the previous comic was removed.
 
**But no new header was inserted. Not even the go to [[#Header text|Header text]] about the release days of xkcd.
 
***Since the previous header was related only to the [[:Category:April fools' comics|April fools' comic]] [[2288: Collector's Edition]], and that had stopped the promotion of the [[How To]] book, after first experiencing problems with it's release, it seems Randall forgot what he usually put in the header.
 
*It stayed empty like this until [https://web.archive.org/web/20200602213017/https://xkcd.com/ 2020-06-02] when [[2314: Carcinization]] was on the front page.
 
**So almost two month without a header. This had not happened before.
 
 
 
===2020-04-04 - Put together by===
 
*[https://web.archive.org/web/20200404014814/http://xkcd.com/ 2020-04-04].
 
**[[2288: Collector's Edition]] came out and the header changed.
 
**The text:
 
***Today's comic was put together by [https://chromakode.com/ Max Goodhart], [https://twitter.com/Aiiane Amber], [https://twitter.com/bstaffin Benjamin Staffin], [https://twitter.com/cotrone Kevin], [https://www.instagram.com/fading_interest/ @fading_interest], [https://twitter.com/wirehead2501 Kat], [https://twitter.com/zigdon @zigdon], and Christopher Night.
 
****All names have links except the last.
 
**It thanks those that helped Randall create this years [[:Category:April fools' comics|April fools' comic]], which had taken two extra days before it was released due to the complex nature of the comic.
 
*Due to the delay the next comic, [[2289: Scenario 4]], was released already the day after the Fool's comic, even though it was thus [[2289:_Scenario_4#Trivia|on a Saturday]]!
 
**Since this header was related only to the Fool's comic, it was thus removed from the general header, but it stayed up as [[#Collector.27s_Edition|one of]] the permanent [[#Unique_header_text|unique header texts]].
 
***However, when it was removed from the general header, the header was left empty.
 
***Unlike some other headers that stayed on a given comic, this one was on all comics for the duration of the time it stayed on the front page, see for instance the previous comic on [https://web.archive.org/web/20200403232031/https://xkcd.com/2287/ 2020-04-03].
 
 
 
===2020-04-02 - Technical Reasons===
 
*[https://web.archive.org/web/20200402234828/https://xkcd.com/ 2020-04-02].
 
**[[2287: Pathogen Resistance]] was up when the header changed.
 
*Randall turned out to, again, have problems with his complicated and interactive [[:Category:April fools' comics|April fools' comic]] for 2020.
 
**The text:
 
***Note: For technical reasons Wednesday's comic will be posted Thursday instead. Apologies for the delay!
 
*This finally stopped the promotion of the [[How To]] book.
 
**It had then been part of the header for well over a year since [http://web.archive.org/web/20190206060904/https://xkcd.com/ 2019-02-06].
 
*It stayed up a day longer than planed as the fool's comic, [[2288: Collector's Edition]] was first released on Friday, so the note was still up on [https://web.archive.org/web/20200403012612/https://xkcd.com/  2020-04-03].
 
**[[2287: Pathogen Resistance]] thus stayed two extra day on the front page, and the third comic of that week, [[2289: Scenario 4]] was released already the day after the Fool's comic, even though it was thus [[2289:_Scenario_4#Trivia|on a Saturday]]!
 
 
 
===2020-01-16 - How To explores - again===
 
*[https://web.archive.org/web/20200116190038/https://xkcd.com/ 2020-01-16].
 
**[[2255: Tattoo Ideas]] was still up when the header changed.
 
**The ongoing promotion of the book continued but here more than three weeks after Christmas the reference to Christmas was removed.
 
**The header then returned to the one from before Christmas:
 
***[[#2019-11-22 - How To explores|How To explores]] - see that for all other details.
 
*It was last up on [https://web.archive.org/web/20200401221435/https://xkcd.com/ 2020-04-01] when [[2287: Pathogen Resistance]] was on the front page.
 
**It was the problems with [[:Category:April fools' comics|April fools' comic]] of 2020 that finally stopped the promotion of the [[How To]] book.
 
**It had then been part of the header for well over a year since [http://web.archive.org/web/20190206060904/https://xkcd.com/ 2019-02-06].
 
 
 
===2019-12-02 - Into Science===
 
*[https://web.archive.org/web/20191202223745/https://xkcd.com/ 2019-12-02].
 
**[[2236: Is it Christmas?]] came out when the header changed. Fitting as the change is about Christmas list.
 
**Still promoting the new [[How To]] book, continuing to make the image a link to the [https://xkcd.com/how-to/ How To book] page on xkcd.
 
***The links below to order are the same as in the previous header.
 
***Actually most of the header stays the same with the same four images and the same layout. But the text above has changed completely and the two main text sections between the drawings has changed but only slightly. The description of the images is thus left out, see below. Only new thing is that there are now two red circles connected with a red arrow. The first circle is around the word How To at the end of the first text with the arrow going from that circle to the second circle drawn around the picture of the book.
 
**The text:
 
***Is there someone on you Christmas list who's into science? They might like my new book '''''How To'''''
 
***It explores ridiculous ideas for applying scientific research to everyday problems...
 
***...And illustrates what would happen if you tried them.
 
***''Boom''
 
***You can get it here:
 
***[https://www.amazon.com/How-Absurd-Scientific-Real-World-Problems/dp/0525537090/ Amazon], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/2/trackingcode/PRH5522E62429 B&N], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/6/trackingcode/penguinrandom IndieBound], [https://itunes.apple.com/us/book/how-to/id1451461524?mt=11 Apple], [https://www.audible.com/search?advsearchKeywords=How+To+Randall+Munroe&source_code=COMA0213WS031709&SID=PRHA9A5E24CFB--9780525635680 Audible], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/23/trackingcode/PRH3D17167A3B Target]
 
*It was last up on [https://web.archive.org/web/20200115155040/https://xkcd.com/ 2020-01-15] when [[2255: Tattoo Ideas]] was on the front page.
 
 
 
===2019-11-22 - How To explores===
 
*[https://web.archive.org/web/20191122214439/https://xkcd.com/ 2019-11-22].
 
**[[2232: Hotel Room Party]] was up when the header changed. It most likely changed when the comic appeared. Earlier on that day it was the previous header over the previous comic.
 
**Still promoting the new [[How To]] book, here again making the image a link to the [https://xkcd.com/how-to/ How To book] page on xkcd, after it previously was a link to where to listen to the audio book.
 
***The links below to order returns to the same as in the header before the previous header with links to audio books, except that the link to an exclusive edition has been removed.
 
***The header consist of an image with text above five small drawings with two text parts in between them. To the left is the closed How To book which is black with a blue readable title, How To, and unreadable white text below this as well as below the unreadable blue author name, which are below the image. The image shows Cueball putting in a light-bulb with drones under each foot while Megan, holding a ladder, and White/Black Hat are looking up at him. To the right of the book is a drawing of Ponytail pole-vaulting with two black helium filled balloons. Next to her is the first text segment. Then after that is the drawing, seen before in the header text, of a truck towing a house up a steep hill. This truck goes above the second text segment, with Cueball somersaulting above the text. Furthest right, above and just right of the text is an explosion with the sound written inside. Below the header image is some black text and then the links to where to get it as regular blue link text.
 
**The text:
 
***My new book '''''How To''''' explores the science behind spacecraft heat shields, butterfly metabolisms, and land border surveys...
 
***...By imagining ridiculous ideas for applying the research to you everyday life...
 
***...And illustrating what would happen if you tried them.
 
***''Boom''
 
***You can get it here:
 
***[https://www.amazon.com/How-Absurd-Scientific-Real-World-Problems/dp/0525537090/ Amazon], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/2/trackingcode/PRH5522E62429 B&N], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/6/trackingcode/penguinrandom IndieBound], [https://itunes.apple.com/us/book/how-to/id1451461524?mt=11 Apple], [https://www.audible.com/search?advsearchKeywords=How+To+Randall+Munroe&source_code=COMA0213WS031709&SID=PRHA9A5E24CFB--9780525635680 Audible], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/23/trackingcode/PRH3D17167A3B Target]
 
*It was last up on [https://web.archive.org/web/20191201191025/https://xkcd.com/ 2019-12-01] when [[2235: Group Chat Rules]] was on the front page.
 
 
 
===2019-11-06 - Audio clip===
 
*[https://web.archive.org/web/20191106204314/https://xkcd.com/ 2019-11-06].
 
**[[2224: Software Updates]] was still up when the header changed, but the first archive version was first from after the next comic came out [[2225: Voting Referendum]].
 
**Still promoting the new [[How To]] book, here making the image a link to the How To book on Penguin Random House's audio book, where an audio clip read by Wil Wheaton can be sampled.
 
***The links below to order have now changed to those with audio books.
 
***The header consist of an image with text, with a "blue link", above the How To book that is being folded out from closed; to partially open; to opened up on two full pages; this takes three images. The closed book is the black book with a blue readable title, How To, and unreadable white text below this as well as below the unreadable blue author name, which are below the image. The image shows Cueball putting in a light-bulb with drones under each foot while Megan, holding a ladder, and White/Black Hat are looking up at him. The partly open book still has this cover partly visible, but unreadable, as well as come unreadable text in the open side. The open book shows two pages with lots of unreadable text and three figures (maybe one is a table). Next to the open book there is an arrow to the right pointing at an audio icon with three audio lines in front. Below the header image are the links as regular text.
 
**The text:
 
***You can <u>click here</u> to hear a clip from the audio version of '''''How To''''', read by Wil Wheaton.
 
***[https://books.apple.com/us/audiobook/how-to-absurd-scientific-advice-for-common-real-world/id1475319694 Apple], [https://www.audiobooks.com/audiobook/how-to-absurd-scientific-advice-for-common-real-world-problems/369279 Audiobooks], [https://www.audible.co.uk/pd/How-To-Audiobook/1473680360?qid=1574679523&sr=1-1&pf_rd_p=c6e316b8-14da-418d-8f91-b3cad83c5183&pf_rd_r=DX3EZ14M14CFQPP9GHJY&ref=a_search_c3_lProduct_1_1 Audible], [https://play.google.com/store/books/details/Randall_Munroe_How_To?id=LzSGDwAAQBAJ Google Play], and [https://libro.fm/audiobooks/9780525635680 Libro.fm]
 
**The entire image is a link to the [https://www.penguinrandomhouseaudio.com/book/576760/how-to/ How To book on Penguin Random House] page, where the audio clip can he played.
 
***As always it is the entire picture that is a link, and not only the blue underlined text that says click here!
 
*It was last on the archive on [https://web.archive.org/web/20191122044456/https://xkcd.com/ 2019-11-22] when [[2231: the Time Before And After Land]] was on the front page. But it was most likely still up when [[2232: Hotel Room Party]] came out. But then changed during the next day.
 
 
 
===2019-10-02 - Horse vs football team===
 
*[https://web.archive.org/web/20191002005854/https://xkcd.com/ 2019-10-02].
 
**[[2210: College Athletes]] was up when the header changed.
 
**Still promoting the new [[How To]] book, but seeing this is no longer close to the release day the focus has changed. This time the image seems to be from one of the How To explanations in the book.
 
***The links below to order are the same as the previous header.
 
***But new text is added after the links to promote two events with Randall in New York the two days after this header came up.
 
****These links disappeared after a week leaving only the picture and the link to buy the book. See below.
 
***The header consist of an image with Cueball riding bareback on a horse. He comes from the left holding an American football. Running towards him from the right are eight American football players with helmets with three stars on the back of the helmet.  Two of the players at the back are almost hidden by players in front of them. Beneath them is a line of text that belongs to the image, the period at the end of the sentence hangs in height with the center line of the last letter E... Then below the image follows the link and promotion of the NY events, these are written in regular.
 
**The text:
 
***My new book ''How To'' is out now! You can get it here.
 
***[https://www.amazon.com/How-Absurd-Scientific-Real-World-Problems/dp/0525537090/ Amazon], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/2/trackingcode/PRH5522E62429 B&N], [https://www.barnesandnoble.com/w/how-to-randall-munroe/1130494832?ean=9780525686910#/ B&N Exclusive Edition], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/6/trackingcode/penguinrandom IndieBound], [https://itunes.apple.com/us/book/how-to/id1451461524?mt=11 Apple], [https://www.audible.com/search?advsearchKeywords=How+To+Randall+Munroe&source_code=COMA0213WS031709&SID=PRHA9A5E24CFB--9780525635680 Audible], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/23/trackingcode/PRH3D17167A3B Target] I'll be at New York Comic Con! I'm giving [https://www.newyorkcomiccon.com/Explore/Panels/Panels-And-Screenings/#/event/how-todo-anything-with-randall-munroe-creator-of-xkcd a talk on Thursday], and on
 
***Friday [https://smbc-comics.com/ Zach Weinersmith] and I will be hosting [https://www.caveat.nyc/event/how-to--absurd-scientific-advice-for-common-real-world-problems-10-4-2019 an event at Caveat NYC].
 
**The image is a link to the [https://xkcd.com/how-to/ How To book page] on xkcd.
 
***The link to Target still seems to go the main page rather than to [https://intl.target.com/p/how-to-by-randall-munroe-hardcover/-/A-76508342 their How To book page]... Probably a still undiscovered error on Randall's part?
 
*This header changed, but so slightly that the changes will only be mentioned here rather than in a new section:
 
**The first link was last active on [https://web.archive.org/web/20191004014438/https://xkcd.com/ 2019-10-04]
 
**Then the day after only the second link remained from [https://web.archive.org/web/20191005041539/https://www.xkcd.com/ 2019-10-05]. [[2211: Hours Before Departure]] came out when it changed.
 
***But the text of this link changed as it had been a continues text from one to the other link. Also it was not entirely on it's own line, thus not as with the first link whose text was directly connected to the line with the links to buy the book.
 
***The new text of that link was:
 
****[https://smbc-comics.com/ Zach Weinersmith] and I will be hosting [https://www.caveat.nyc/event/how-to--absurd-scientific-advice-for-common-real-world-problems-10-4-2019 an event] Friday night at Caveat NYC!
 
****The last link was the same, but now it only covered two words not the entire end of the sentence.
 
***This other link was last active on [https://web.archive.org/web/20191007042707/https://xkcd.com/ 2019-10-07].
 
**And then the last link was gone by [https://web.archive.org/web/20191008053609/https://xkcd.com/ 2019-10-08], when [[2212: Cell Phone Functions]] came out.
 
*It ended on [https://web.archive.org/web/20191105164001/https://xkcd.com/ 2019-11-05] when [[2224: Software Updates]] was up.
 
 
 
===2019-09-30 - Tons of fun===
 
*[https://web.archive.org/web/20190930234245/https://xkcd.com/ 2019-09-30].
 
**[[2209: Fresh Pears]] was up when the header changed.
 
**Still promoting the new [[How To]] book, but seeing this is no longer close to the release day the focus has changed to how much fun it was for Randall to write it and how proud he is of the result. Randall, as Cueball, is saying this in the new header image.
 
***The links below to order are the same, except a new has been added at the end.
 
***The header consist of an image with Cueball standing to the left of the book, shown as tall as he is. The book is opened up on two pages with lots of unreadable text as well as three drawings, only one of these, with a circle diagram, can clearly be seen. Cueball is speaking, and the text is above him and the book. Two words are blue with a line under as if they where a link. But as always the entire image is a link. Beneath the image is the links on where to order the book.
 
**The text:
 
***Writing my new book '''''How To''''' was tons of fun and I'm so proud of the result. It's out now-<u>Click Here</u> to order!
 
***Order: [https://www.amazon.com/How-Absurd-Scientific-Real-World-Problems/dp/0525537090/ Amazon], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/2/trackingcode/PRH5522E62429 B&N], [https://www.barnesandnoble.com/w/how-to-randall-munroe/1130494832?ean=9780525686910#/ B&N Exclusive Edition], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/6/trackingcode/penguinrandom IndieBound], [https://itunes.apple.com/us/book/how-to/id1451461524?mt=11 Apple], [https://www.audible.com/search?advsearchKeywords=How+To+Randall+Munroe&source_code=COMA0213WS031709&SID=PRHA9A5E24CFB--9780525635680 Audible], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/23/trackingcode/PRH3D17167A3B Target]
 
**The image is a link to the [https://xkcd.com/how-to/ How To book page] on xkcd.
 
***The new link to Target seems to go the main page rather than to [https://intl.target.com/p/how-to-by-randall-munroe-hardcover/-/A-76508342 their How To book page]... Probably an error on Randall's part.
 
*It ended on October 2nd while [[2210: College Athletes]] where up. But there is no archived versions from the 1st of October and the one from the 2nd is with the next version. But the editor of this was making changes to the explanation of College Athletes before the next header change came along.
 
 
 
===2019-09-11 - How To available===
 
 
*[https://web.archive.org/web/20190911053115/https://xkcd.com/ 2019-09-11].
 
*[https://web.archive.org/web/20190911053115/https://xkcd.com/ 2019-09-11].
 
**[[2200: Unreachable State]] was still up when the header changed.
 
**[[2200: Unreachable State]] was still up when the header changed.
**The release day part of the promotion was changed to telling that the new [[How To]] book was available. With teasers about what is in the book below the heading. On either side of the text a picture of the book is still shown. Also the links below changed, adding three new and removing one old.
+
**The release day part of the promotion was changed to telling that the new [[How To]] book was available. With teasers about what is in the book below the heading. On either side of the text a picture of the book is still shown. Also the links below changed, adding two new and removing one old.
 
***The header consist of an image with the book shown both left and right of some text. Both books have blue title and author name, and white unreadable title and white drawing of Cueball flying on two quadcopters to put in a light-bulb in a ceiling lamp, while White/Black? Hat is watching together with Megan, who is holding a ladder. Beneath the image is the links on where to order it.
 
***The header consist of an image with the book shown both left and right of some text. Both books have blue title and author name, and white unreadable title and white drawing of Cueball flying on two quadcopters to put in a light-bulb in a ceiling lamp, while White/Black? Hat is watching together with Megan, who is holding a ladder. Beneath the image is the links on where to order it.
 
***Between the two books are two sections of text above each other, the lover with smaller font.
 
***Between the two books are two sections of text above each other, the lover with smaller font.
Line 675: Line 88:
 
***How To is available now!
 
***How To is available now!
 
***Learn how to open bottles with nuclear weapons and how to be on time for meetings by altering the Earths rotation. The book also features advice from real-life experts including Chris Hadfield and Serena Williams.
 
***Learn how to open bottles with nuclear weapons and how to be on time for meetings by altering the Earths rotation. The book also features advice from real-life experts including Chris Hadfield and Serena Williams.
***Order: [https://www.amazon.com/How-Absurd-Scientific-Real-World-Problems/dp/0525537090/ Amazon], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/2/trackingcode/PRH5522E62429 B&N], [https://www.barnesandnoble.com/w/how-to-randall-munroe/1130494832?ean=9780525686910#/ B&N Exclusive Edition], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/6/trackingcode/penguinrandom IndieBound],[https://itunes.apple.com/us/book/how-to/id1451461524?mt=11 Apple], [https://www.audible.com/search?advsearchKeywords=How+To+Randall+Munroe&source_code=COMA0213WS031709&SID=PRHA9A5E24CFB--9780525635680 Audible]
+
***Order: [https://www.amazon.com/How-Absurd-Scientific-Real-World-Problems/dp/0525537090/ Amazon], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/2/trackingcode/PRH5522E62429 B&N], [https://www.barnesandnoble.com/w/how-to-randall-munroe/1130494832?ean=9780525686910#/ B&N Exclusive Edition], [http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/6/trackingcode/penguinrandom IndieBound], [https://itunes.apple.com/us/book/how-to/id1451461524?mt=11 Apple Audible]
**The image is a link to the [https://xkcd.com/how-to/ How To book page] on xkcd.
+
*It ended on [ 2019-??-??] when [ comic?? ] was up.
**{{w|Serena Williams}} is a famous tennis player who was also featured in one of the [[:Category:Book promotion|promotion comics]] for How To: [[2190: Serena Versus the Drones]]
 
**{{w|Chris Hadfield}} is a Canadian retired astronaut, engineer, and former Royal Canadian Air Force fighter pilot. The first Canadian to walk in space, Hadfield has flown two Space Shuttle missions and served as commander of the International Space Station.
 
***The new link to audible probably needs the user to be signed up, else it will go to the front page and ask yo to sign up. But from the archive the page can be seen [https://web.archive.org/web/20190923004816/https://www.audible.com/search?advsearchKeywords=How+To+Randall+Munroe&source_code=COMA0213WS031709&SID=PRHA9A5E24CFB--9780525635680 here].
 
*Up till [https://web.archive.org/web/20190922143253/https://xkcd.com/ 2019-09-22] it looked like this.
 
**Then on [https://web.archive.org/web/20190923145251/https://xkcd.com/ 2019-09-23] and extra link was added after Audible:
 
***[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/23/trackingcode/PRH3D17167A3B Target].
 
**[[2205: Types of Approximation]] was up when this change occurred during a weekend.
 
*It ended on [https://web.archive.org/web/20190929223547/https://xkcd.com/ 2019-09-29] when [[2208: Drone Fishing]] was up.
 
  
===2019-09-04 - Happy Release Day - bookstore===
+
====2019-09-04 - Happy Release Day - bookstore====
 
*[https://web.archive.org/web/20190904051509/https://xkcd.com/ 2019-09-04].
 
*[https://web.archive.org/web/20190904051509/https://xkcd.com/ 2019-09-04].
 
**[[2198: Throw]] was already up when the header changed slightly, as the text below Happy release day changed.
 
**[[2198: Throw]] was already up when the header changed slightly, as the text below Happy release day changed.
*Most of the header stayed the same as the [[#2019-09-03 - Happy Release Day - calendar|day before]], but the reference to the Gregorian/Julian calendar was changed.
+
*Most of the header stayed the same as the [[#2019-09-03 - Happy Release Day - calender|day before]], but the reference to the Gregorian/Julian calender was changed.
 
**The header consist of an image with the book shown both left and right of some text.Both books have blue title and author name, and white unreadable title and white drawing of Cueball flowing on two quadcopters to put in a light-bulb in a ceiling lamp, while White/Black? Hat is watching together with Megan comes who is holding a ladder. Beneath the image is the link on where to order it, now the preorder has been changed to order.
 
**The header consist of an image with the book shown both left and right of some text.Both books have blue title and author name, and white unreadable title and white drawing of Cueball flowing on two quadcopters to put in a light-bulb in a ceiling lamp, while White/Black? Hat is watching together with Megan comes who is holding a ladder. Beneath the image is the link on where to order it, now the preorder has been changed to order.
 
***Between the two books are two sections of text above each other, the lover with smaller font and in brackets.
 
***Between the two books are two sections of text above each other, the lover with smaller font and in brackets.
Line 699: Line 104:
 
*It ended on [https://web.archive.org/web/20190909211737/https://xkcd.com/ 2019-09-09] when [[2200: Unreachable State]] was up.
 
*It ended on [https://web.archive.org/web/20190909211737/https://xkcd.com/ 2019-09-09] when [[2200: Unreachable State]] was up.
  
===2019-09-03 - Happy Release Day - calendar===
+
====2019-09-03 - Happy Release Day - calendar====
 
*[https://web.archive.org/web/20190903051503/https://xkcd.com/ 2019-09-03]  
 
*[https://web.archive.org/web/20190903051503/https://xkcd.com/ 2019-09-03]  
 
**[[2197: Game Show]] was still up when the header changed, but it was for sure to coincide with [[2198: Throw]] which came out later on the release day while it still looked like in this version.
 
**[[2197: Game Show]] was still up when the header changed, but it was for sure to coincide with [[2198: Throw]] which came out later on the release day while it still looked like in this version.
Line 712: Line 117:
 
***How To Randall Munroe
 
***How To Randall Munroe
 
***Order: [https://www.amazon.com/How-Absurd-Scientific-Real-World-Problems/dp/0525537090/ Amazon],[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/2/trackingcode/PRH5522E62429 Barnes & Noble],[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/6/trackingcode/penguinrandom IndieBound],[https://itunes.apple.com/us/book/how-to/id1451461524?mt=11 Apple Books]
 
***Order: [https://www.amazon.com/How-Absurd-Scientific-Real-World-Problems/dp/0525537090/ Amazon],[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/2/trackingcode/PRH5522E62429 Barnes & Noble],[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/6/trackingcode/penguinrandom IndieBound],[https://itunes.apple.com/us/book/how-to/id1451461524?mt=11 Apple Books]
**The image is a link to the [https://xkcd.com/how-to/ How To book page] on xkcd.
+
***The image is a link to the [https://xkcd.com/how-to/ How To book page] on xkcd.
 
**Most of the world uses the {{w|Gregorian calendar}}, but before it was taken into use, the  {{w|Julian calendar}} was in use.  
 
**Most of the world uses the {{w|Gregorian calendar}}, but before it was taken into use, the  {{w|Julian calendar}} was in use.  
 
***The Julian calendar does not take into account that every 100 years a leap year should be passed as in the Gregorian calendar, and thus it is at the moment 13 days behind, as it has has this many February 29th too many. Since there should actually be a leap year every 400 year, and the last of those was 2000, then it has been 13 days since 1900, and will stay like this until 2100 when it will become 14 days.
 
***The Julian calendar does not take into account that every 100 years a leap year should be passed as in the Gregorian calendar, and thus it is at the moment 13 days behind, as it has has this many February 29th too many. Since there should actually be a leap year every 400 year, and the last of those was 2000, then it has been 13 days since 1900, and will stay like this until 2100 when it will become 14 days.
 
***The image is a link to the [https://xkcd.com/how-to/ How To book page] on xkcd.
 
***The image is a link to the [https://xkcd.com/how-to/ How To book page] on xkcd.
**Already the next day the part of the header below happy release day about the Gregorian calendar changed. See [[#2019-09-04 - Happy Release Day - bookstore|above]].
+
**Already the next day the part of the header below happy release day about the Gregorian calender changed. See [[#2019-09-04 - Happy Release Day - bookstore|above]].
  
===2019-08-27 - Out in a week===
+
====2019-08-27 - Out in a week====
 
*[https://web.archive.org/web/20190827082224/https://xkcd.com/ 2019-08-27].
 
*[https://web.archive.org/web/20190827082224/https://xkcd.com/ 2019-08-27].
 
**[[2194: How to Send a File]] was up when the header changed.
 
**[[2194: How to Send a File]] was up when the header changed.
Line 737: Line 142:
 
*It ended on the release day 2019-09-03, so this was last on the page on [https://web.archive.org/web/20190902042108/https://xkcd.com/ 2019-09-02].
 
*It ended on the release day 2019-09-03, so this was last on the page on [https://web.archive.org/web/20190902042108/https://xkcd.com/ 2019-09-02].
  
===2019-08-06 - Win a sketch===
+
====2019-08-06 - Win a sketch====
 
*[http://web.archive.org/web/20190806052948/https://xkcd.com/ 2019-08-06].
 
*[http://web.archive.org/web/20190806052948/https://xkcd.com/ 2019-08-06].
 
**[[2185: Cumulonimbus]] was up when the header changed.
 
**[[2185: Cumulonimbus]] was up when the header changed.
Line 752: Line 157:
 
*The header stayed like this until [https://web.archive.org/web/20190826062701/https://www.xkcd.com/ 2019-08-26] when [[2193: Well-Ordering Principle]] was up.
 
*The header stayed like this until [https://web.archive.org/web/20190826062701/https://www.xkcd.com/ 2019-08-26] when [[2193: Well-Ordering Principle]] was up.
  
===2019-08-03 - First look inside===
+
====2019-08-03 - First look inside====
 
*[http://web.archive.org/web/20190803222711/https://xkcd.com/ 2019-08-03].
 
*[http://web.archive.org/web/20190803222711/https://xkcd.com/ 2019-08-03].
 
**[[2184: Unpopular Opinions]] was up when the header changed.
 
**[[2184: Unpopular Opinions]] was up when the header changed.
Line 774: Line 179:
 
**When the next comic came out late that Monday, it probably disappeared along with the Disappearing comic, but the first update with the next header is from Tuesday [http://web.archive.org/web/20190806052948/https://xkcd.com/ 2019-08-06], but the Monday comic [[2185: Cumulonimbus]] was still on the front page at that time,.
 
**When the next comic came out late that Monday, it probably disappeared along with the Disappearing comic, but the first update with the next header is from Tuesday [http://web.archive.org/web/20190806052948/https://xkcd.com/ 2019-08-06], but the Monday comic [[2185: Cumulonimbus]] was still on the front page at that time,.
  
===2019-07-23 - Back to previous header===
+
====2019-07-23 - Back to previous header====
 
*[http://web.archive.org/web/20190723205152/https://xkcd.com/ 2019-07-23].
 
*[http://web.archive.org/web/20190723205152/https://xkcd.com/ 2019-07-23].
 
**[[2179: NWS Warnings]] was up when the header changed.
 
**[[2179: NWS Warnings]] was up when the header changed.
Line 780: Line 185:
 
*It stayed up until [http://web.archive.org/web/20190802192259/https://xkcd.com/ 2019-08-02] while [[2184: Unpopular Opinions]] was up. The day after when it changed that comic was still up.
 
*It stayed up until [http://web.archive.org/web/20190802192259/https://xkcd.com/ 2019-08-02] while [[2184: Unpopular Opinions]] was up. The day after when it changed that comic was still up.
  
===2019-07-15 - ComiCon===
+
====2019-07-15 - ComiCon====
 
*[http://web.archive.org/web/20190715181016/http://xkcd.com/ 2019-07-15].
 
*[http://web.archive.org/web/20190715181016/http://xkcd.com/ 2019-07-15].
 
**[[2176: How Hacking Works]] was up when the header changed.
 
**[[2176: How Hacking Works]] was up when the header changed.
*Randall tells that he will be at ComicCon and links to his plans there.
+
*Randall tels that he will be at ComicCon and links to his plans there.
 
**The text:
 
**The text:
 
***Going to San Diego Comic Con this week? I'll [https://blog.xkcd.com/2019/07/15/san-diego-comic-con/ see you there]!  
 
***Going to San Diego Comic Con this week? I'll [https://blog.xkcd.com/2019/07/15/san-diego-comic-con/ see you there]!  
Line 793: Line 198:
 
**Then it returned to the previous header from before the ComicCon announcement when [[2179: NWS Warnings]] came out.
 
**Then it returned to the previous header from before the ComicCon announcement when [[2179: NWS Warnings]] came out.
  
===2019-07-10 - Adding links===
+
====2019-07-10 - Adding links====
 
*[http://web.archive.org/web/20190710165920/https://xkcd.com/ 2019-07-10].
 
*[http://web.archive.org/web/20190710165920/https://xkcd.com/ 2019-07-10].
 
**[[2173: Trained a Neural Net]] was still up when the header changed slightly from that fro the day before.
 
**[[2173: Trained a Neural Net]] was still up when the header changed slightly from that fro the day before.
**Only change was that beneath the picture, see [[#2019-07-09 - Drawings from How To|2019-07-09]], there is now a list of four links to companies where the book can be preordered.
+
**Only change was that beneath the picture, see [[#2019-07-09 - Drawings from How To|2019-07-09],] there is now a list of four links to companies where the book can be preordered.
 
**The extra text:
 
**The extra text:
 
***[Four links in gray blue are given with the first word in black:] Preorder:[https://www.amazon.com/How-Absurd-Scientific-Real-World-Problems/dp/0525537090/ Amazon],[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/2/trackingcode/PRH5522E62429 Barnes & Noble],[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/6/trackingcode/penguinrandom IndieBound],[https://itunes.apple.com/us/book/how-to/id1451461524?mt=11 Apple Books]
 
***[Four links in gray blue are given with the first word in black:] Preorder:[https://www.amazon.com/How-Absurd-Scientific-Real-World-Problems/dp/0525537090/ Amazon],[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/2/trackingcode/PRH5522E62429 Barnes & Noble],[http://links.penguinrandomhouse.com/type/affiliate/isbn/9780525537090/siteID/8001/retailerid/6/trackingcode/penguinrandom IndieBound],[https://itunes.apple.com/us/book/how-to/id1451461524?mt=11 Apple Books]
*Note that the day after this change, [https://web.archive.org/web/20190711172451/https://xkcd.com/ 2019-07-11], a link to [[How To]] was added to the [[Design_of_xkcd.com#xkcd_links|links]] in the top left corner of xkcd.
+
*The header stayed like this until [http://web.archive.org/web/20190714175710/https://xkcd.com/ 2019-07-14] when [[2175: Flag Interpretation]] was up. When it changed the day after [[2176: How Hacking Works]] was up.  
*The header stayed like this until [http://web.archive.org/web/20190714175710/https://xkcd.com/ 2019-07-14] when [[2175: Flag Interpretation]] was up. When it changed the day after [[2176: How Hacking Works]] was up.
 
  
===2019-07-09 - Drawings from How To===
+
====2019-07-09 - Drawings from How To====
 
*[http://web.archive.org/web/20190709162102/https://xkcd.com/ 2019-07-09].
 
*[http://web.archive.org/web/20190709162102/https://xkcd.com/ 2019-07-09].
 
**[[2173: Trained a Neural Net]] was up when the header changed.
 
**[[2173: Trained a Neural Net]] was up when the header changed.
Line 823: Line 227:
 
**So a total of 16 days with this drawing.
 
**So a total of 16 days with this drawing.
  
===2019-06-25 - People with books===
+
====2019-06-25 - People with books====
 
*[http://web.archive.org/web/20190625190843/https://xkcd.com/ 2019-06-25].
 
*[http://web.archive.org/web/20190625190843/https://xkcd.com/ 2019-06-25].
 
**[[2167: Motivated Reasoning Olympics]] was up when the header changed.
 
**[[2167: Motivated Reasoning Olympics]] was up when the header changed.
 
**Randall continues to promote his new book, [[How To]], and his book tour.
 
**Randall continues to promote his new book, [[How To]], and his book tour.
 
***The image now shows 15 people standing side by side each holding a book up in front of them with unreadable titles.
 
***The image now shows 15 people standing side by side each holding a book up in front of them with unreadable titles.
***From left: [[Megan]], [[Cueball]], a man with blonde hair, [[Jill]], [[Blondie]], [[Hairy]], another Hairy, [[White Hat]], a kid with curly hair, [[Hairbun]], another Cueball, another Megan, a guy with a knit cap, [[Ponytail]], and [[Beret Guy]].
+
***From left: [[Megan]], [[Cueball]], a man with blonde hair, [[Science Girl]], [[Blondie]], [[Hairy]], another Hairy, [[White Hat]], a kid with curly hair, [[Hairbun]], another Cueball, another Megan, a guy with a knit cap, [[Ponytail]] and [[Beret Guy]].
 
***Above them is a text message.
 
***Above them is a text message.
 
**The text:
 
**The text:
Line 839: Line 243:
 
*The header stayed like this until [http://web.archive.org/web/20190708155517/https://xkcd.com/ 2019-07-08] when [[2172: Lunar Cycles]] was up. When it changed the day after [[2173: Trained a Neural Net]] was up.  
 
*The header stayed like this until [http://web.archive.org/web/20190708155517/https://xkcd.com/ 2019-07-08] when [[2172: Lunar Cycles]] was up. When it changed the day after [[2173: Trained a Neural Net]] was up.  
  
===2019-06-15 - Adding dates===
+
====2019-06-15 - Adding dates====
 
*[http://web.archive.org/web/20190615100645/http://xkcd.com/ 2019-06-15]
 
*[http://web.archive.org/web/20190615100645/http://xkcd.com/ 2019-06-15]
 
**[[2163: Chernobyl]] was up when the header changed.
 
**[[2163: Chernobyl]] was up when the header changed.
Line 853: Line 257:
 
*The header stayed like this until 2019-06-25, when it changed while [[2167: Motivated Reasoning Olympics]] was up. But this one was still up when that comic came out the day before [http://web.archive.org/web/20190624162740/https://xkcd.com/ 2019-06-24].
 
*The header stayed like this until 2019-06-25, when it changed while [[2167: Motivated Reasoning Olympics]] was up. But this one was still up when that comic came out the day before [http://web.archive.org/web/20190624162740/https://xkcd.com/ 2019-06-24].
  
===2019-06-11 - Book tour===
+
====2019-06-11 - Book tour====
 
*[http://web.archive.org/web/20190611031920/https://xkcd.com/ 2019-06-11]
 
*[http://web.archive.org/web/20190611031920/https://xkcd.com/ 2019-06-11]
 
**[[2161: An Apple a Day]] was up when the header changed.
 
**[[2161: An Apple a Day]] was up when the header changed.
Line 885: Line 289:
 
***Then it changed slightly to indicate that the picture was a link which was not clear before. See above.
 
***Then it changed slightly to indicate that the picture was a link which was not clear before. See above.
  
===2019-05-17 - Back to previous header===
+
====2019-05-17 - Back to previous header====
 
*[http://web.archive.org/web/20190517103928/https://xkcd.com/ 2019-05-17]:
 
*[http://web.archive.org/web/20190517103928/https://xkcd.com/ 2019-05-17]:
 
**[[2150: XKeyboarCD]] was still up when the header changed.  
 
**[[2150: XKeyboarCD]] was still up when the header changed.  
Line 892: Line 296:
 
**It stayed up for more than three weeks and was still up on [http://web.archive.org/web/20190610055519/https://www.xkcd.com/ 2019-06-10], while [[2160: Ken Burns Theory]] was still up on the day the next comic [[2161: An Apple a Day]] was to be released (where the new header could be found at least the next day, but maybe from the release of that comic?). Then it changed to announce the book tour for his new book.
 
**It stayed up for more than three weeks and was still up on [http://web.archive.org/web/20190610055519/https://www.xkcd.com/ 2019-06-10], while [[2160: Ken Burns Theory]] was still up on the day the next comic [[2161: An Apple a Day]] was to be released (where the new header could be found at least the next day, but maybe from the release of that comic?). Then it changed to announce the book tour for his new book.
  
===2019-04-23 - Google Reader===
+
====2019-04-23 - Google Reader====
 
*[http://web.archive.org/web/20190423155458/https://xkcd.com/ 2019-04-23]:
 
*[http://web.archive.org/web/20190423155458/https://xkcd.com/ 2019-04-23]:
 
**[[2140: Reinvent the Wheel]] came out when it changed, ending a more than two and half month long [[#2019-02-06 - How to book|promotion]] of Randall's new book [[How To]].
 
**[[2140: Reinvent the Wheel]] came out when it changed, ending a more than two and half month long [[#2019-02-06 - How to book|promotion]] of Randall's new book [[How To]].
Line 906: Line 310:
 
**It stayed up for more than three weeks and was still up on [http://web.archive.org/web/20190516100403/https://xkcd.com/ 2019-05-16], when [[2150: XKeyboarCD]] was up. Then it changed back to the promotion of his new book.
 
**It stayed up for more than three weeks and was still up on [http://web.archive.org/web/20190516100403/https://xkcd.com/ 2019-05-16], when [[2150: XKeyboarCD]] was up. Then it changed back to the promotion of his new book.
  
===2019-02-06 - How to book===
+
====2019-02-06 - How to book====
 
*[http://web.archive.org/web/20190206060904/https://xkcd.com/ 2019-02-06]:
 
*[http://web.archive.org/web/20190206060904/https://xkcd.com/ 2019-02-06]:
 
**[[2107: Launch Risk]] was up at the time when it changed, having been up since Monday the 4th of February.
 
**[[2107: Launch Risk]] was up at the time when it changed, having been up since Monday the 4th of February.
Line 928: Line 332:
 
**It stayed up for more than two and a half month and was still up on [http://web.archive.org/web/20190422030324/https://xkcd.com/ 2019-04-22], when  [[2139: Email Settings]] was up. Then it finally changed to a new header without going back to the standard.
 
**It stayed up for more than two and a half month and was still up on [http://web.archive.org/web/20190422030324/https://xkcd.com/ 2019-04-22], when  [[2139: Email Settings]] was up. Then it finally changed to a new header without going back to the standard.
  
===2018-11-07 - Back to standard text===
+
====2018-11-07 - Back to standard text====
 
*[http://web.archive.org/web/20181107144453/https://www.xkcd.com/ 2018-11-07]
 
*[http://web.archive.org/web/20181107144453/https://www.xkcd.com/ 2018-11-07]
**The text returned to the standard xkcd header:  
+
**The text returned to the standard xkcd header: xkcd updates every Monday, Wednesday, and Friday.
***xkcd updates every Monday, Wednesday, and Friday.
+
***It stayed like this until [[2107: Launch Risk]] was up on [http://web.archive.org/web/20190205050302/https://xkcd.com/ 2019-02-05].
**It stayed like this until [[2107: Launch Risk]] was up on [http://web.archive.org/web/20190205050302/https://xkcd.com/ 2019-02-05], so two days less than three months.
 
***After this it did not return to the standard text for almost three years, but just short of a month before the third year without it, it returned on [[#2022-01-08 - Back to standard text|2022-01-08]].
 
  
===2018-11-06 - Election Day===
+
====2018-11-06 - Election Day====
 
*[http://web.archive.org/web/20181106122850/https://xkcd.com/ 2018-11-06]:  
 
*[http://web.archive.org/web/20181106122850/https://xkcd.com/ 2018-11-06]:  
 
**[[2068: Election Night]] (on election day the day after this comic was released).
 
**[[2068: Election Night]] (on election day the day after this comic was released).
Line 957: Line 359:
 
****It stayed like this until [[2107: Launch Risk]] was up on [http://web.archive.org/web/20190205050302/https://xkcd.com/ 2019-02-05].
 
****It stayed like this until [[2107: Launch Risk]] was up on [http://web.archive.org/web/20190205050302/https://xkcd.com/ 2019-02-05].
  
===2018-11-02 - Where to vote===
+
====2018-11-02 - Where to vote====
 
*[http://web.archive.org/web/20181103021059/https://xkcd.com/ 2018-11-02]:  
 
*[http://web.archive.org/web/20181103021059/https://xkcd.com/ 2018-11-02]:  
 
**[[2067: Challengers]] (on the Friday, it was released).
 
**[[2067: Challengers]] (on the Friday, it was released).
Line 970: Line 372:
 
**It was still up the day before the election day, [http://web.archive.org/web/20181105105855/https://xkcd.com/ 2018-11-05], and then it changed with the next comic.
 
**It was still up the day before the election day, [http://web.archive.org/web/20181105105855/https://xkcd.com/ 2018-11-05], and then it changed with the next comic.
  
===2018-10-22 - Register for voting===
+
====2018-10-22 - Register for voting====
 
*[http://web.archive.org/web/20181022120935/https://xkcd.com/ 2018-10-22]:  
 
*[http://web.archive.org/web/20181022120935/https://xkcd.com/ 2018-10-22]:  
 
**[[2061: Tectonics Game]] (on a Monday, the 3rd day after release of this Friday comic)
 
**[[2061: Tectonics Game]] (on a Monday, the 3rd day after release of this Friday comic)
Line 983: Line 385:
 
***It was still there while [[2066: Ballot Selfies]] was still up the day before on [http://web.archive.org/web/20181102015102/https://xkcd.com/ 2018-11-01].
 
***It was still there while [[2066: Ballot Selfies]] was still up the day before on [http://web.archive.org/web/20181102015102/https://xkcd.com/ 2018-11-01].
  
===2018-09-13 - NY votes today===
+
====2018-09-13 - NY votes today====
 
*[http://web.archive.org/web/20180913133544/https://xkcd.com/ 2018-09-13]
 
*[http://web.archive.org/web/20180913133544/https://xkcd.com/ 2018-09-13]
 
**[[2045: Social Media Announcement]] (the day after the release of the comic.)
 
**[[2045: Social Media Announcement]] (the day after the release of the comic.)
Line 993: Line 395:
 
**It ended with [[2046: Trum-]], the very next comic, on [http://web.archive.org/web/20180914175605/https://xkcd.com/ 2018-09-14], returning to the standard text.
 
**It ended with [[2046: Trum-]], the very next comic, on [http://web.archive.org/web/20180914175605/https://xkcd.com/ 2018-09-14], returning to the standard text.
  
===2017-11-26 - Christmas gifts===
+
====2017-11-26 - Christmas gifts====
 
*[http://web.archive.org/web/20171126130857/http://xkcd.com/ 2017-11-26]
 
*[http://web.archive.org/web/20171126130857/http://xkcd.com/ 2017-11-26]
 
**[[1920: Emoji Sports]] had been up two days [http://web.archive.org/web/20171125125648/https://xkcd.com/ 2017-11-25] before the message changed from the normal version. But it changed the day before the next comic came up.
 
**[[1920: Emoji Sports]] had been up two days [http://web.archive.org/web/20171125125648/https://xkcd.com/ 2017-11-25] before the message changed from the normal version. But it changed the day before the next comic came up.
Line 1,004: Line 406:
 
***But it was still up when the comic in between [[1921: The Moon and the Great Wall]] was up on [http://web.archive.org/web/20171129140033/http://xkcd.com/ 2017-11-29].
 
***But it was still up when the comic in between [[1921: The Moon and the Great Wall]] was up on [http://web.archive.org/web/20171129140033/http://xkcd.com/ 2017-11-29].
  
===2017-09-22 - Visiting the UK===
+
====2017-09-22 - Visiting the UK====
 
*[http://web.archive.org/web/20170922232616/https://xkcd.com/ 2017-09-22]:
 
*[http://web.archive.org/web/20170922232616/https://xkcd.com/ 2017-09-22]:
 
**[[1893: Thread]] (with its release).
 
**[[1893: Thread]] (with its release).
Line 1,014: Line 416:
 
***But it was still up the day before with [[1899: Ears]] on [http://web.archive.org/web/20171009040109/https://xkcd.com/ 2017-10-09].
 
***But it was still up the day before with [[1899: Ears]] on [http://web.archive.org/web/20171009040109/https://xkcd.com/ 2017-10-09].
  
===2017-07-31 - Thank you===
+
====2017-07-31 - Thank you====
 
*[http://web.archive.org/web/20170731021227/https://www.xkcd.com/ 2017-07-31]:  
 
*[http://web.archive.org/web/20170731021227/https://www.xkcd.com/ 2017-07-31]:  
 
**[[1869: Positive and Negative Reviews]] (3rd day after release of this Friday comic)
 
**[[1869: Positive and Negative Reviews]] (3rd day after release of this Friday comic)
Line 1,023: Line 425:
 
**Ended with [[1872: Backup Batteries]] on [http://web.archive.org/web/20170804152509/https://xkcd.com/ 2017-08-04], but was still up when [[1871: Bun Alert]] was up on [http://web.archive.org/web/20170803124342/https://xkcd.com/ 2017-08-03].
 
**Ended with [[1872: Backup Batteries]] on [http://web.archive.org/web/20170804152509/https://xkcd.com/ 2017-08-04], but was still up when [[1871: Bun Alert]] was up on [http://web.archive.org/web/20170803124342/https://xkcd.com/ 2017-08-03].
  
===2017-07-25 - Vote against health care bill===
+
====2017-07-25 - Vote against health care bill====
 
*[http://web.archive.org/web/20170725103104/https://xkcd.com/ 2017-07-25]:  
 
*[http://web.archive.org/web/20170725103104/https://xkcd.com/ 2017-07-25]:  
 
**[[1867: Physics Confession]] (2nd day after release of the comic, it was not up on the first day: [http://web.archive.org/web/20170724095252/https://xkcd.com/ 2017-07-24]).
 
**[[1867: Physics Confession]] (2nd day after release of the comic, it was not up on the first day: [http://web.archive.org/web/20170724095252/https://xkcd.com/ 2017-07-24]).
 
**Randall modified the xkcd header to ask readers to support voting against Donald Trump's new health care bill.
 
**Randall modified the xkcd header to ask readers to support voting against Donald Trump's new health care bill.
 
***The header was replaced with an image which is available in an archived version [https://web.archive.org/web/20170726150959im_/https://imgs.xkcd.com/notes/call-senate.png here].
 
***The header was replaced with an image which is available in an archived version [https://web.archive.org/web/20170726150959im_/https://imgs.xkcd.com/notes/call-senate.png here].
***The image is also a link (and you can click anywhere on it to go to the link that is mentioned).  
+
***The image is also a link (and you can click anywhere on it to go the the link that is mentioned).  
 
****The link goes to [http://web.archive.org/web/20170729003307/https://www.trumpcareten.org/daily TrumpCare Ten] (here in an archived version).  
 
****The link goes to [http://web.archive.org/web/20170729003307/https://www.trumpcareten.org/daily TrumpCare Ten] (here in an archived version).  
 
****Randall has previously made it clear, in [[1572: xkcd Survey]], that he knows how to make an image a link, but not how to put the link only where he says to click.
 
****Randall has previously made it clear, in [[1572: xkcd Survey]], that he knows how to make an image a link, but not how to put the link only where he says to click.
Line 1,043: Line 445:
 
***That comic came out already [http://web.archive.org/web/20170728124230/https://xkcd.com/ three days before] (Friday comic), but was still up on [http://web.archive.org/web/20170730141019/https://www.xkcd.com/ 2017-07-30]) when the message changed sometimes between Sunday 30th and Monday 31st (where [[1870: Emoji Movie Reviews]] was released).
 
***That comic came out already [http://web.archive.org/web/20170728124230/https://xkcd.com/ three days before] (Friday comic), but was still up on [http://web.archive.org/web/20170730141019/https://www.xkcd.com/ 2017-07-30]) when the message changed sometimes between Sunday 30th and Monday 31st (where [[1870: Emoji Movie Reviews]] was released).
  
===2017-01-21 - Update on previous===
+
====2017-01-21 - Update on previous====
 
*[http://web.archive.org/web/20170122003124/https://xkcd.com/ 2017-01-21]:  
 
*[http://web.archive.org/web/20170122003124/https://xkcd.com/ 2017-01-21]:  
 
**[[1788: Barge]]
 
**[[1788: Barge]]
Line 1,055: Line 457:
 
***And it did not return to the standard version in between.
 
***And it did not return to the standard version in between.
  
===2016-11-28 - Christmas sale===
+
====2016-11-28 - Christmas sale====
 
*[http://web.archive.org/web/20161128153015/http://xkcd.com 2016-11-28]
 
*[http://web.archive.org/web/20161128153015/http://xkcd.com 2016-11-28]
 
**[[1765: Baby Post]]
 
**[[1765: Baby Post]]
Line 1,066: Line 468:
 
**Ended with [[1788: Barge]] [http://web.archive.org/web/20170121114423/https://xkcd.com/ 2017-01-21]
 
**Ended with [[1788: Barge]] [http://web.archive.org/web/20170121114423/https://xkcd.com/ 2017-01-21]
  
===2016-04-23 - Back to standard text===
+
====Changes not documented yet 3====
*[https://web.archive.org/web/20160423103108/http://xkcd.com/ 2016-04-23]
+
*Before the above was  
**When [[1671: Arcane Bullshit]] came out (probably 2016-04-22, but no earlier archived versions exist) the text returned to the standard xkcd header:
+
**xkcd updates every Monday, Wednesday, and Friday.  
***xkcd updates every Monday, Wednesday, and Friday.
+
**Which Ended with [[1764: XKCDE]] on [http://web.archive.org/web/20161128093459/http://xkcd.com/ 2016-11-28].
**It stayed like this for more than 7 months until [[1764: XKCDE]] was up on [https://web.archive.org/web/20161128093459/http://xkcd.com/ 2016-11-28].
+
*More changes could be here between this and the one below.
 
+
**Definitely some thing explainer changes here below.
===2016-04-04 - Protip on Garden===
+
*[https://web.archive.org/web/20151022200022/http://xkcd.com/ 2015-10-22] changed the header below.
*[https://web.archive.org/web/20160404185353/http://www.xkcd.com/#5dbfbb82-fc20-11e5-8001-42010a8e000d 2016-04-04]
 
**Because of the complexity of the [[:Category:April fools' comics|April fools' comic]] [[1663: Garden]], Randall needed to give people some advice, hence a [[:Category:Protip|protip]] was added.
 
***This came in several versions, not all managed to be documented in the archive. See more in the trivia for garden regarding the [[1663:_Garden#Header_text_after_release|Header text after release]].
 
**The header text became a protip with the following text (the first version not documented only had the first line):
 
***'''Protip''': If you don't like how your garden is growing, you can click to prune it.
 
***You can copy the URL to share your garden. From other browsers, it will be view-only.
 
**When the next comic, [[1664: Mycology]], was released two days later on [https://web.archive.org/web/20160406194653/http://xkcd.com/1664/ 2016-04-06], an extra line of text was added, due to the issues caused by Garden not being on the front page {{xkcd}} but only on the numbered page {{xkcd|1663}}.
 
***This change was first documented on the front page the day after on [https://web.archive.org/web/20160407010635/http://xkcd.com/ 2016-04-07]
 
***The change was of course also on and all the other comic and thus also on the Garden comic from [https://web.archive.org/web/20160406192530/http://xkcd.com/1663/ 2016-04-06].
 
**Text added below the other two lines:
 
***Note: If you're seeing today's comic in place of your garden, change the URL from xkcd.com/#<your code> to xkcd.com/1663/#<your code>.
 
****This extra line was only there until next time the comic change, so last day was [https://web.archive.org/web/20160408145017/http://xkcd.com/ 2016-04-08].
 
**On [https://web.archive.org/web/20160408195958/http://xkcd.com/ 2016-04-08] when [[1665: City Talk Pages]] was released the extra line was removed leaving the two written first here above.
 
***This was also the case on the Garden comic (and all other comics) from [https://web.archive.org/web/20160408204740/http://xkcd.com:80/1663/ 2016-04-08].
 
**The Protip stayed in the main header text until [https://web.archive.org/web/20160422102754/http://xkcd.com/ 2016-04-22] when [[1670: Laws of Physics]] was up.
 
***But even though it disappeared from main header and thus from all other comic it stayed on the Garden comic, also on [https://web.archive.org/web/20160423182630/http://xkcd.com:80/1663/ 2016-04-23].
 
***And it has then turned out to become one of the permanent [[xkcd_Header_text#Garden|Unique header texts]].
 
 
 
===2016-04-04 - Back to standard text as Garden came up===
 
*[https://web.archive.org/web/20160404123555/http://xkcd.com/ 2016-04-04]
 
**For a brief period of time, when [[1663: Garden]]  was finally released, the Header text returned to the standard xkcd header:
 
***xkcd updates every Monday, Wednesday, and Friday.  
 
**But this lasted less than 13 hours. (Time between the previous and next archived version is 13 hours and 7 minutes).
 
***As people needed guidance to the new complicated comic.
 
 
 
===2016-04-01 - April 1st comic - technical difficulties===
 
*[https://web.archive.org/web/20160401204749/https://xkcd.com/ 2016-04-01]
 
**When Randall had problem releasing [[1663: Garden]] several [[1663:_Garden#April_Fools.27_header_text|April Fools' header text]] arrived in short succession while [[1662: Jack and Jill]] was still up.
 
**Each of these where simple text.
 
***The first from the link abve:
 
****The xkcd April 1st comic is currently experiencing technical difficulties.
 
****Please stand by!
 
***The next from [https://web.archive.org/web/20160402125723/http://xkcd.com:80/ 2016-04-02] at 12:57:
 
****The xkcd April 1st comic is currently experiencing technical difficulties.
 
****Status update: Please stand by.
 
****Status update: This is fine. Everything is fine.
 
****Status update: Everything is on fire.
 
****Status update: Searching for calendar systems in which Saturday is April 1st.
 
***The next from [https://web.archive.org/web/20160402175822/http://www.xkcd.com  2016-04-02] at 17:58:
 
****The Friday xkcd comic is currently experiencing technical difficulties
 
****[Editor's note: Everything is on fire] and has been delayed until Sunday night.
 
**It stayed like the third version until [https://web.archive.org/web/20160404054612/http://xkcd.com/ 2016-04-04] three days after the April Fools' comic was supposed to come out, so Jack and Jill was up until it changed.
 
*This was what was needed to stop more than 10 months of promotion of the [[Thing Explainer]] book, see below.
 
 
 
===2015-12-13 - Thing Explainer is available===
 
*[https://web.archive.org/web/20151213194534/http://xkcd.com/ 2015-12-13]
 
**[[1615: Red Car]] was still up when the header changed.
 
***The change was that the promotion for where Randall was last week where removed and left only the promotion the book [[Thing Explainer]]:
 
**The text:
 
***Thing Explainer is available at: [https://www.amazon.com/Thing-Explainer-Complicated-Stuff-Simple/dp/0544668251 Amazon], [https://www.barnesandnoble.com/w/thing-explainer-randall-munroe/1121864432?ean=9780544668256#/ Barnes & Noble], [https://www.indiebound.org/book/9780544668256 Indie Bound], [https://www.hudsonbooksellers.com/thingexplainer Hudson]
 
**It was last up on [https://web.archive.org/web/20160401125621/http://xkcd.com/ 2016-04-01] while [[1662: Jack and Jill]] was on the front page.
 
***This was the last time that Thing Explainer was [[:Category:Book promotion|promoted]] in the header text.
 
****The first time was [[xkcd_Header_text#2015-05-14_-_New_book_Thing_Explainer|2015-05-14]], so it had been part of the header text for almost ten and a half month. That is a record!
 
 
 
===2015-12-05 - Thing Explainer is available and Next week===
 
*[https://web.archive.org/web/20151205070539/http://xkcd.com/ 2015-12-05]
 
**[[1612: Colds]] was up when the header changed.
 
***This was also at this time the [[2015-11-24 - Pages from my new book Thing Explainer|previous header texts image] was moved below the comic.
 
**Randall goes back to a simple promotion of the book [[Thing Explainer]] listing where to boy it.'
 
***But he adds a line about where he will be next week, first to a book shop on Illinois and then later in Toronto, where the host was {{w|Ryan North}} from [https://qwantz.com/ Dinosaur comics], one of the [[Design_of_xkcd.com#Comics_I_enjoy|comics Randall enjoys]].
 
**The text:
 
***Thing Explainer is available at: [https://www.amazon.com/Thing-Explainer-Complicated-Stuff-Simple/dp/0544668251 Amazon], [https://www.barnesandnoble.com/w/thing-explainer-randall-munroe/1121864432?ean=9780544668256#/ Barnes & Noble], [https://www.indiebound.org/book/9780544668256 Indie Bound], [https://www.hudsonbooksellers.com/thingexplainer Hudson]
 
***I'll be in [https://web.archive.org/web/20151211002159/http://www.andersonsbookshop.com/event/naperville-reads-randall-munroe Naperville, IL] and [https://web.archive.org/web/20151205205714/http://www.eventbrite.ca/e/indigo-exclusive-randall-munroe-tickets-18694384407 Toronto, ON] (with [https://qwantz.com/ Ryan North]!) next week.
 
**It was last up on [https://web.archive.org/web/20151212133400/http://xkcd.com:80/ 2015-12-12] while [[1615: Red Car]] was on the front page.
 
 
 
===2015-11-24 - Pages from my new book Thing Explainer===
 
*[https://web.archive.org/web/20151203234149/http://xkcd.com/ 2015-12-03]
 
**[[1611: Baking Soda and Vinegar]] was still up when the header changed.
 
***This was a special one comic header text consisting of a large image with pages and excerpts from the book [[Thing Explainer]].
 
***The image was larger than most comics, and took away the focus of today's comic.
 
***So already two days after, when [[1612: Colds]] was released, the image was relegated to the being below the comic, but inside the [[Design_of_xkcd.com#Main_comic|main comic]] segment, thus not a part of the [[Design_of_xkcd.com#Bottom_segment|bottom segment]].
 
****But it was displayed in the header for all comics, here [https://web.archive.org/web/20151204030024/http://xkcd.com/1609/ an example] from the comic released two comics before 1611, [[1609: Food Combinations]].
 
****See more (and the image) [[Thing_Explainer#Promotion_at_the_xkcd_home_page|here]] on the page for Thing Explainer.
 
**Description of the image:
 
***At the top are shown four pages from the book. Two mainly blue, left and right, with white text and large images and between them two mainly white pages with blue text and smaller images. None of the text is readable, but the two blue pages pictures can be understood even in this size.
 
****The first page is number 2 about an animal cell: ''Tiny bags of water you’re made of''. It shows a detailed drawing of a human cell, with text at the top, and then several labels with text beneath that have arrows pointing to different parts of the cell.
 
****The second page is number 31 about the cockpit of an airplane: ''Stuff you touch to fly a sky boat''. It shows the inside of a cockpit with view out of the four windows, with lots of buttons in the ceiling, and blue screens and instruments at the bottom.  Out the windows can be seen clouds and Cueball hanging from a balloon (a reference to [[1110: Click and Drag]]).
 
*****A zoom in on this page is shown beneath the four pages, see more below.
 
****The third page is page 27. What is on this page is a bit difficult to see, as there are no big drawings with clear meaning. It is the second page in a two page section on Data centers, with the second page focusing on the Computer: ''Computer building''. The pictures shows the data racks, to the right, and the individual computer components put into these, to the top left, with the wiring shown below to the left. Lots of text with arrows to different parts.
 
****The fourth page is page 23 about Trees: ''Tree''. It clearly shows the silhouette of a white tree on blue background. Several animal live on, in and beneath it. Cueball is standing on the ground. All the text are beneath labels that points to parts of the tree or the tree dwellers.
 
***In between the two time two pages there is a readable text, split over five lines, with two arrow at the top going from the corners of the text to the near corners of the white pages to either side. And below three arrows, with two pointing similarly as the two top arrows, but starting at the bottom of the text, and one arrow pointing straight down from the middle of the text to the large image below.
 
***Beneath all this is a large image which shows a zoom in on the left part of the cockpit from the second page above. The zoom is focused on the two front windows, but only the left is entirely in the picture, and the balloon hanging Cueball, cannot be seen in this part of the right window.
 
****At this zoom level, most of the text van be read (that is labels written on things or having arrows pointing to them). Clouds can bee seen out of both windows and in the background a rocket launch with smoke plume below the rocket is visible. The horizon line is well defines across both windows. Some of the instruments can be seen below the windows with text written on them. And some blue areas, mainly screens can be seen.
 
***Beneath this picture is a line with links to where the book can be ordered, like the one from the previous header text.
 
**The text:
 
***Pages from my new book, ''Thing Explainer'': Complicated stuff in simple words.
 
***[Labels in the cockpit]:
 
****Sky
 
****Ground (This should be below the sky. If it's above the sky, you're either having a big problem or doing something ''really'' fun.)
 
****Use this stuff to tell the sky boat to fly itself.
 
****Fly
 
****How fast it feels IAS 172
 
****Direction  HDG 240
 
****Fall or rise
 
****How high 2500
 
****Fly
 
****Helpful screen
 
****Where the ground is
 
****You are: Flying
 
****Look here if there is a problem
 
***Below this image is a line of text with the first word in black and the other are four links to where to order the book:
 
****Order: [https://www.amazon.com/Thing-Explainer-Complicated-Stuff-Simple/dp/0544668251 Amazon], [https://www.barnesandnoble.com/w/thing-explainer-randall-munroe/1121864432?ean=9780544668256#/ Barnes & Noble], [https://www.indiebound.org/book/9780544668256 Indie Bound], [https://www.hudsonbooksellers.com/thingexplainer Hudson]
 
***The image is a link to [https://www.amazon.com/gp/product/0544668251/ref=as_li_qf_sp_asin_il_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=0544668251&linkCode=as2&tag=thekcs-20&linkId=S4XRZJJKSMHOWEQU Thing Explainer on Amazon].
 
**It was only part of the header for two days until [https://web.archive.org/web/20151204050419/http://xkcd.com/ 2015-12-04].
 
***It was then moved below the comics as mentioned above from [https://web.archive.org/web/20151205070539/http://xkcd.com/ 2015-12-05] when the next comic [[1612: Colds]] came out.
 
 
 
===2015-11-24 - Thing Explainer is out today===
 
*[https://web.archive.org/web/20151124201602/http://xkcd.com/ 2015-11-24]
 
**[[1607: Supreme Court]] was still up, but [[1608: Hoverboard]] most have come out close to the change.
 
***See both [https://web.archive.org/web/20151125001228/http://xkcd.com/ 2015-11-25 00:12] and [https://web.archive.org/web/20151125230753/http://xkcd.com/ 2015-11-25 23:07].
 
***Since this new "comic" was actually a {{w|browser game}} made to celebrate the release of Randall's new book, ''[[Thing Explainer]]'', which was released on the same day as this comic: Tuesday, November 24, 2015.  The comic thus appeared on a Tuesday, replacing that week's normal Wednesday release to coincide with the release day.
 
***Hence it is a shame that there is no archived versions on the 24th showing Hoverboard on the front page. Even though the new version of the Header text is shown on the 24th, but on the previous comic.
 
**Cause all the header text is about is the release day of Thing Explainer!
 
***The top part is text with a line with large letters and a line below in brackets and using smaller letters. Below that there is a line dividing the text from the next part.
 
***Below follows the same header that was up as early as [[#2015-05-15 - Thing Explainer details|2015-05-15]] with the open book and three lines of text.
 
**The text:
 
***My new book, [http://blog.xkcd.com/2015/05/13/new-book-thing-explainer/ Thing Explainer], is out today!
 
***(If you're in NYC, you can also [https://web.archive.org/web/20150925015809/http://stores.barnesandnoble.com:80/author/11170358 come see me]!)
 
***A picture of the open book is shown with diagrams of a human cell on the left page and suspension bridges on the right. All held in blue nuances. And arrow goes from the first word of the text to the right to the book on the left. The text is also blue except the title of the book which is in red:
 
****New book: Thing Explainer
 
****Up Goer Five-style diagrams of things (explained in the ten-hundred most common words)
 
***Below this image is a line of text with the first word in black and the other are four links to where to order the book:
 
****Order: [https://www.amazon.com/Thing-Explainer-Complicated-Stuff-Simple/dp/0544668251 Amazon], [https://www.barnesandnoble.com/w/thing-explainer-randall-munroe/1121864432?ean=9780544668256#/ Barnes & Noble], [https://www.indiebound.org/book/9780544668256 Indie Bound], [https://www.hudsonbooksellers.com/thingexplainer Hudson]
 
***The image above the order line is a link to the [[Blag]] post [https://blog.xkcd.com/2015/05/13/new-book-thing-explainer/ New book: Thing Explainer].
 
**Already the day after [https://web.archive.org/web/20151125001228/http://xkcd.com/ 2015-11-25], when [[1608: Hoverboard]] was up, an extra line (a link) was added below the above. A line was separating it from the links above:
 
***[http://blog.xkcd.com/2015/11/24/a-puzzle-for-the-uk/ A puzzle for UK readers]
 
****This was to a blag post with A puzzle for the UK because he could not go to UK in person. So this was a kind of bonus for those who could solve it. (We need an entry on that here on xkcd...)
 
**On [https://web.archive.org/web/20151127114432/http://xkcd.com/ 2015-11-27] is still looked like this but then when the next comic, [[1609: Food Combinations]], came out on [https://web.archive.org/web/20151128130851/http://xkcd.com/ 2015-11-28] the line about seeing him in New York was removed.
 
**The version with the puzzle, but without the New York line, was then up until [https://web.archive.org/web/20151201222148/http://xkcd.com/ 2015-12-01] when [[1610: Fire Ants]] was up.
 
**Then on [https://web.archive.org/web/20151202225254/http://www.xkcd.com/ 2015-12-02] the line with the puzzle at the bottom was changed to:
 
***I'm doing a [https://www.facebook.com/AndyWeirAuthor/ live Q&A;] at 2:30pm PT with The Martian author Andy Weir.
 
****The link is to {{w|Andy Weir}}'s Facebook page. And the Q&A can likely not be seen anymore.
 
****Randall has made no less than two comics about the movie {{w|The Martian (film)|The Martian}}, [[1536: The Martian]] and [[1585: Similarities]].
 
***It only lasted that day, and this became the last day with this header text, so it ended while [[1611: Baking Soda and Vinegar]] was up.
 
  
===2015-10-22 - World Polio Day===
+
====2015-09-23 - Book trip and tool====
*[https://web.archive.org/web/20151022200022/http://xkcd.com/ 2015-10-22]
 
**[[1593: Play-By-Play]] was up when the header changed.
 
***Randall mentions World Polio Day and the comic he drew for Bill Gates' blog, [[XKCD Marks the Spot]].
 
***Although he still keeps mentioning the release date for [[Thing Explainer]].
 
**The text:
 
***We've [https://slate.com/technology/2015/08/no-new-polio-in-africa-for-one-year-gates-epidemiologist-on-vaccines-and-surveillance.html almost eradicated polio]. For World Polio Day, I drew a comic
 
***about the eradication efforts. You can see it on [https://www.gatesnotes.com/Health/XKCD-Marks-the-Spot Bill Gates's blog].
 
***My [https://blog.xkcd.com/2015/05/13/new-book-thing-explainer/ new book] of complex diagrams and simple words comes out Nov 24th.
 
****The last line is split from the Polio announcement with a line.
 
**Was there until [[1607: Supreme Court]] was up on [https://web.archive.org/web/20151124065108/http://xkcd.com:80/ 2015-11-24].
 
***That was the day that the book was released, and when the next comic [[1608: Hoverboard]] came out, it was a celebration of the book.
 
 
 
===2015-09-23 - Book trip and tool===
 
 
*[https://web.archive.org/web/20150923044724/http://xkcd.com/ 2015-09-23]:
 
*[https://web.archive.org/web/20150923044724/http://xkcd.com/ 2015-09-23]:
 
**[[1580: Travel Ghost]] was up when the header changed.  
 
**[[1580: Travel Ghost]] was up when the header changed.  
Line 1,231: Line 486:
 
**Was there until [[1593: Play-By-Play]] was up on [https://web.archive.org/web/20151021164208/http://xkcd.com/ 2015-10-21].
 
**Was there until [[1593: Play-By-Play]] was up on [https://web.archive.org/web/20151021164208/http://xkcd.com/ 2015-10-21].
  
===2015-09-06 - New links===
+
====2015-09-06 - New links====
 
*[https://web.archive.org/web/20150906181550/http://xkcd.com/ 2015-09-06]:
 
*[https://web.archive.org/web/20150906181550/http://xkcd.com/ 2015-09-06]:
 
**[[1573: Cyberintelligence]] was still up when the header changed.  
 
**[[1573: Cyberintelligence]] was still up when the header changed.  
Line 1,240: Line 495:
 
**Was there until [[1579: Tech Loops]] was up on [https://web.archive.org/web/20150919220105/http://xkcd.com/ 2015-09-22].
 
**Was there until [[1579: Tech Loops]] was up on [https://web.archive.org/web/20150919220105/http://xkcd.com/ 2015-09-22].
  
===2015-08-09 - Back to previous header===
+
====2015-08-09 - Back to previous header====
 
*[https://web.archive.org/web/20150809230825/http://xkcd.com/ 2015-08-09]:
 
*[https://web.archive.org/web/20150809230825/http://xkcd.com/ 2015-08-09]:
 
**[[1561: Water Phase Diagram]] was still up when the header changed.  
 
**[[1561: Water Phase Diagram]] was still up when the header changed.  
Line 1,247: Line 502:
 
**Stayed like this until [[1573: Cyberintelligence]] was out on [https://web.archive.org/web/20150905154014/https://xkcd.com/ 2015-09-05], but the only change was that the links to preorder changed from four to only two.
 
**Stayed like this until [[1573: Cyberintelligence]] was out on [https://web.archive.org/web/20150905154014/https://xkcd.com/ 2015-09-05], but the only change was that the links to preorder changed from four to only two.
  
===2015-06-06 - Other news===
+
====2015-06-06 - Other news====
 
*[https://web.archive.org/web/20150606084120/http://www.xkcd.com/ 2015-06-06]
 
*[https://web.archive.org/web/20150606084120/http://www.xkcd.com/ 2015-06-06]
**Changed while [[1534: Beer]] was still up.
+
**Changed while [[1534: Beerl]] was still up.
 
***This was just adding some "Other news", but leaving the promotion of [[Thing Explainer]] unchanged as in the [[#2015-05-15 - Thing Explainer details|previous header]], but adding two news stories in text below the link to preorder.
 
***This was just adding some "Other news", but leaving the promotion of [[Thing Explainer]] unchanged as in the [[#2015-05-15 - Thing Explainer details|previous header]], but adding two news stories in text below the link to preorder.
 
**The new text:
 
**The new text:
***In other news, [https://www.youtube.com/watch?v=ygrdAvmr-MA Space Weird Thing] is delightful, and I feel surprisingly invested in [https://web.archive.org/web/20150720074919/https://twitter.com/xkcdbracket @xkcdbracket's] results.  
+
***In other news, [https://www.youtube.com/watch?v=ygrdAvmr-MA Space Weird Thing} is delightful, and I feel surprisingly invested in [https://web.archive.org/web/20150720074919/https://twitter.com/xkcdbracket @xkcdbracket's] results.  
****The link to Space Weird Thing is a YouTube video with a simple words version of {{w|David Bowie|David Bowie's}} [https://www.youtube.com/watch?v=iYYRH4apXDo Space Oddity] music video, using only the top then hundred words. The creators contributes the idea to the [[1133: Up Goer Five]] diagram which also inspired the book Thing Explainer, also promoted in this header text.  
+
****The link to Space Weird Thing is a Youtube video with a simple words version of {{{w|David Bowie|David Bowie's}} [https://www.youtube.com/watch?v=iYYRH4apXDo Space Oddity] music video, using only the top then hundred words. The creators contributes the idea to the [[1133: Up Goer Five]] diagram which also inspired the book Thing Explainer, also proomoted in this header text.  
 
****The other link is referring to [[1529: Bracket]] released 12 days before this update, as a twitter user made a survey going through all the brackets all the way to a winner was found. Seems Randall became interested in who won. See more on the comics page.
 
****The other link is referring to [[1529: Bracket]] released 12 days before this update, as a twitter user made a survey going through all the brackets all the way to a winner was found. Seems Randall became interested in who won. See more on the comics page.
 
**Was there until [[1561: Water Phase Diagram]] was up on [https://web.archive.org/web/20150807181044/http://xkcd.com/ 2015-08-07]. Then it returned back to the previous header with only the promotion of the book.
 
**Was there until [[1561: Water Phase Diagram]] was up on [https://web.archive.org/web/20150807181044/http://xkcd.com/ 2015-08-07]. Then it returned back to the previous header with only the promotion of the book.
  
===2015-05-15 - Thing Explainer details===
+
====2015-05-15 - Thing Explainer details====
 
*[http://web.archive.org/web/20150515060322/http://www.xkcd.com/ 2015-05-15]
 
*[http://web.archive.org/web/20150515060322/http://www.xkcd.com/ 2015-05-15]
 
**[[1525: Emojic 8 Ball]]
 
**[[1525: Emojic 8 Ball]]
Line 1,268: Line 523:
 
****Preorder: [https://www.amazon.com/Thing-Explainer-Complicated-Stuff-Simple/dp/0544668251 Amazon], [https://www.barnesandnoble.com/w/thing-explainer-randall-munroe/1121864432?ean=9780544668256#/ Barnes & Noble], [https://www.indiebound.org/book/9780544668256 Indie Bound], [https://www.hudsonbooksellers.com/thingexplainer Hudson]
 
****Preorder: [https://www.amazon.com/Thing-Explainer-Complicated-Stuff-Simple/dp/0544668251 Amazon], [https://www.barnesandnoble.com/w/thing-explainer-randall-munroe/1121864432?ean=9780544668256#/ Barnes & Noble], [https://www.indiebound.org/book/9780544668256 Indie Bound], [https://www.hudsonbooksellers.com/thingexplainer Hudson]
 
***The image above the preorder line is a link to the [[Blag]] post [https://blog.xkcd.com/2015/05/13/new-book-thing-explainer/ New book: Thing Explainer].
 
***The image above the preorder line is a link to the [[Blag]] post [https://blog.xkcd.com/2015/05/13/new-book-thing-explainer/ New book: Thing Explainer].
**Changed while [[1534: Beer]] was up on [https://web.archive.org/web/20150605082643/http://xkcd.com/ 2015-06-05], but only to add other information. The main promotion of the book stayed the same.
+
**Changed while [[1534: Beerl]] was up on [https://web.archive.org/web/20150605082643/http://xkcd.com/ 2015-06-05], but only to add other information. The main promotion of the book stayed the same.
  
===2015-05-14 - New book Thing Explainer===
+
====2015-05-14 - New book Thing Explainer====
 
*[https://web.archive.org/web/20150514053623/http://www.xkcd.com/ 2015-05-14]  
 
*[https://web.archive.org/web/20150514053623/http://www.xkcd.com/ 2015-05-14]  
 
**[[1524: Dimensions]] was up.
 
**[[1524: Dimensions]] was up.
Line 1,276: Line 531:
 
**The text:
 
**The text:
 
***New book: [https://blog.xkcd.com/2015/05/13/new-book-thing-explainer/ Thing Explainer!]
 
***New book: [https://blog.xkcd.com/2015/05/13/new-book-thing-explainer/ Thing Explainer!]
*The [[:Category:Book promotion|promotion of the book]] stayed up with some changes for [[xkcd_Header_text#2015-12-13_-_Thing_Explainer_is_available|more than 10 month]] first stopping when Randall had [[xkcd_Header_text#2016-04-01_-_The_xkcd_April_1st_comic_is_currently_experiencing_technical_difficulties|problems with his April Fool's comic]] in 2016... It is a record length.
+
*The promotion of the book stayed up with some changes for the rest of the year...
 
**The first came already the day after so this short announcement was only up on this day and ended with the next comic. See above.
 
**The first came already the day after so this short announcement was only up on this day and ended with the next comic. See above.
 
**See more details on the promotion of the book on the Thing Explainer page [[Thing_Explainer#Promotion_at_the_xkcd_home_page|here]].
 
**See more details on the promotion of the book on the Thing Explainer page [[Thing_Explainer#Promotion_at_the_xkcd_home_page|here]].
  
===2015-02-11 - Back to standard text===
+
====2015-02-11 - Back to standard text====
 
*[https://web.archive.org/web/20150211154103/http://xkcd.com/ 2015-02-11]
 
*[https://web.archive.org/web/20150211154103/http://xkcd.com/ 2015-02-11]
**When [[1485: Friendship]] came out the text returned to the standard xkcd header:  
+
**The text returned to the standard xkcd header: xkcd updates every Monday, Wednesday, and Friday.
***xkcd updates every Monday, Wednesday, and Friday.
+
***It stayed like this until [[1523: Microdrones]] was up on [https://web.archive.org/web/20150512184622/http://xkcd.com/ 2019-05-12].
**It stayed like this until [[1523: Microdrones]] was up on [https://web.archive.org/web/20150512184622/http://xkcd.com/ 2015-05-12], so just a day more than three months.
 
  
===2015-02-04 - Valentine cards only===
+
====2015-02-04 - Valentine cards only====
 
*[https://web.archive.org/web/20150204051152/http://xkcd.com/ 2015-02-04]
 
*[https://web.archive.org/web/20150204051152/http://xkcd.com/ 2015-02-04]
 
**[[1482: NowPlaying]] came out as it changed.
 
**[[1482: NowPlaying]] came out as it changed.
Line 1,292: Line 546:
 
***See that [[#2015-01-29 - Valentine cards and shirt|header change]], but only the first picture described.
 
***See that [[#2015-01-29 - Valentine cards and shirt|header change]], but only the first picture described.
 
**Ended while [[1484: Apollo Speeches]] was up on [https://web.archive.org/web/20150210005540/http://xkcd.com/ 2015-02-10].
 
**Ended while [[1484: Apollo Speeches]] was up on [https://web.archive.org/web/20150210005540/http://xkcd.com/ 2015-02-10].
 +
*On [https://web.archive.org/web/20150211154103/http://xkcd.com/ 2015-02-11] the text then returned to the standard xkcd header: xkcd updates every Monday, Wednesday, and Friday.
 +
**It stayed like this until [[1523: Microdrones]] was up on [https://web.archive.org/web/20150512184622/http://xkcd.com/ 2019-05-12].
  
===2015-02-02 - Last day shirt===
+
====2015-02-02 - Last day shirt====
 
*[https://web.archive.org/web/20150202092804/http://xkcd.com/ 2015-02-02]
 
*[https://web.archive.org/web/20150202092804/http://xkcd.com/ 2015-02-02]
 
**[[1481: API]] came out as it changed.
 
**[[1481: API]] came out as it changed.
Line 1,303: Line 559:
 
**Ended before the next comic was up, but still the day after, when it was too late to order: [https://web.archive.org/web/20150203022036/http://xkcd.com/ 2015-02-03].
 
**Ended before the next comic was up, but still the day after, when it was too late to order: [https://web.archive.org/web/20150203022036/http://xkcd.com/ 2015-02-03].
  
===2015-01-29 - Valentine cards and shirt===
+
====2015-01-29 - Valentine cards and shirt====
 
*[http://web.archive.org/web/20150129183442/http://xkcd.com/  2015-01-29]
 
*[http://web.archive.org/web/20150129183442/http://xkcd.com/  2015-01-29]
 
**[[1479: Troubleshooting]] was up when it changed.
 
**[[1479: Troubleshooting]] was up when it changed.
Line 1,321: Line 577:
 
**Ended while [[1480: Super Bowl]] was up on [https://web.archive.org/web/20150201015913/http://xkcd.com/ 2015-02-01].
 
**Ended while [[1480: Super Bowl]] was up on [https://web.archive.org/web/20150201015913/http://xkcd.com/ 2015-02-01].
  
===2015-01-27 - Valentine's Day cards===
+
====2015-01-27 - Valentine's Day cards====
 
*[http://web.archive.org/web/20150127161237/http://xkcd.com/ 2015-01-27]
 
*[http://web.archive.org/web/20150127161237/http://xkcd.com/ 2015-01-27]
 
**[[1478: P-Values]] was up when it changed.
 
**[[1478: P-Values]] was up when it changed.
Line 1,332: Line 588:
 
**Ended while [[1479: Troubleshooting]] was up [https://web.archive.org/web/20150128172147/http://xkcd.com/ 2015-01-28].
 
**Ended while [[1479: Troubleshooting]] was up [https://web.archive.org/web/20150128172147/http://xkcd.com/ 2015-01-28].
  
===2015-01-24 - Get shirts in store===
+
====2015-01-24 - Get shirts in store====
 
*[http://web.archive.org/web/20150124110707/http://xkcd.com/ 2015-01-24]
 
*[http://web.archive.org/web/20150124110707/http://xkcd.com/ 2015-01-24]
 
**[[1477: Star Wars]] came out as it changed.
 
**[[1477: Star Wars]] came out as it changed.
Line 1,343: Line 599:
 
**Ended while [[1478: P-Values]] was up [http://web.archive.org/web/20150126133139/http://xkcd.com/ 2015-01-26].
 
**Ended while [[1478: P-Values]] was up [http://web.archive.org/web/20150126133139/http://xkcd.com/ 2015-01-26].
  
===2014-12-22 - Get shirts in store===
+
====2014-12-22 - Get shirts in store====
 
*[http://web.archive.org/web/20141222233233/http://xkcd.com/ 2014-12-22]
 
*[http://web.archive.org/web/20141222233233/http://xkcd.com/ 2014-12-22]
 
**[[1463: Altitude]] came out as it changed.
 
**[[1463: Altitude]] came out as it changed.
Line 1,353: Line 609:
 
**Ended while [[1476: Ceres]] was up [http://web.archive.org/web/20150123102318/http://xkcd.com/ 2015-01-23].
 
**Ended while [[1476: Ceres]] was up [http://web.archive.org/web/20150123102318/http://xkcd.com/ 2015-01-23].
  
===2014-12-19 - Back to previous header===
+
====2014-12-19 - Back to previous header====
 
*[http://web.archive.org/web/20141219092349/http://www.xkcd.com/ 2014-12-19]:
 
*[http://web.archive.org/web/20141219092349/http://www.xkcd.com/ 2014-12-19]:
 
**[[1462: Blind Trials]] came out as it changed.
 
**[[1462: Blind Trials]] came out as it changed.
Line 1,360: Line 616:
 
**Ended while [[1462: Blind Trials]] was still up [http://web.archive.org/web/20141221172450/http://www.xkcd.com/ 2014-12-21].  
 
**Ended while [[1462: Blind Trials]] was still up [http://web.archive.org/web/20141221172450/http://www.xkcd.com/ 2014-12-21].  
  
===2014-12-18 - Order now===
+
====2014-12-18 - Order now====
 
*[http://web.archive.org/web/20141218090650/http://www.xkcd.com/ 2014-12-18]
 
*[http://web.archive.org/web/20141218090650/http://www.xkcd.com/ 2014-12-18]
 
**[[1461: Payloads]] was still up when it changed.
 
**[[1461: Payloads]] was still up when it changed.
Line 1,373: Line 629:
 
**Ended a day later while [[1461: Payloads]] was still up [http://web.archive.org/web/20141216084107/http://xkcd.com/ 2014-12-16].
 
**Ended a day later while [[1461: Payloads]] was still up [http://web.archive.org/web/20141216084107/http://xkcd.com/ 2014-12-16].
  
===2014-12-17 - Christmas deadline===
+
====2014-12-17 - Christmas deadline====
 
*[http://web.archive.org/web/20141217085320/http://www.xkcd.com/ 2014-12-17]
 
*[http://web.archive.org/web/20141217085320/http://www.xkcd.com/ 2014-12-17]
 
**[[1461: Payloads]] came out as it changed.
 
**[[1461: Payloads]] came out as it changed.
Line 1,384: Line 640:
 
**Ended a day later while [[1461: Payloads]] was still up!
 
**Ended a day later while [[1461: Payloads]] was still up!
  
===2014-12-03 - Christmas shopping===
+
====2014-12-03 - Christmas shopping====
 
*[http://web.archive.org/web/20141203132024/http://www.xkcd.com/ 2014-12-03]
 
*[http://web.archive.org/web/20141203132024/http://www.xkcd.com/ 2014-12-03]
 
**[[1455: Trolley Problem]] came out as it changed.
 
**[[1455: Trolley Problem]] came out as it changed.
Line 1,397: Line 653:
 
**Ended while [[1460: SMFW]] was up [http://web.archive.org/web/20141216084107/http://xkcd.com/ 2014-12-16].
 
**Ended while [[1460: SMFW]] was up [http://web.archive.org/web/20141216084107/http://xkcd.com/ 2014-12-16].
  
===2014-11-29 - Thanks - Emily===
+
====2014-11-29 - Thanks - Emily====
 
*[http://web.archive.org/web/20141129211604/http://xkcd.com/ 2014-11-29]
 
*[http://web.archive.org/web/20141129211604/http://xkcd.com/ 2014-11-29]
 
**[[1453: fMRI]] was still up when it changed.
 
**[[1453: fMRI]] was still up when it changed.
Line 1,407: Line 663:
 
**Ended three days later while [[1454: Done]] was up [http://web.archive.org/web/20141202065133/http://xkcd.com/ 2014-12-02].
 
**Ended three days later while [[1454: Done]] was up [http://web.archive.org/web/20141202065133/http://xkcd.com/ 2014-12-02].
  
===2014-11-27 - Help Emily===
+
====2014-11-27 - Help Emily====
 
*[http://web.archive.org/web/20141127005239/http://xkcd.com/ 2014-11-27]
 
*[http://web.archive.org/web/20141127005239/http://xkcd.com/ 2014-11-27]
 
**[[1452: Jurassic World]] came out as it changed.
 
**[[1452: Jurassic World]] came out as it changed.
Line 1,420: Line 676:
 
***She did thus not get a permanent header as did Becky on the [[#Seven_Years|Seven Years]] comic.
 
***She did thus not get a permanent header as did Becky on the [[#Seven_Years|Seven Years]] comic.
  
===2014-10-02 - what if? bestseller===
+
====2014-10-02 - what if? bestseller====
 
*[http://web.archive.org/web/20141002211139/http://xkcd.com/ 2014-10-02]
 
*[http://web.archive.org/web/20141002211139/http://xkcd.com/ 2014-10-02]
 
**[[1428: Move Fast and Break Things]] was up when it changed from the [[#2014-09-02 - what if? book out|book is out]].
 
**[[1428: Move Fast and Break Things]] was up when it changed from the [[#2014-09-02 - what if? book out|book is out]].
**This was a month after the ''[[What If? (book)|What If?]]'' book came out.
+
**This was a month after the [[what if?]] book came out.
 
***It added a line of red text beneath the previous header to announce that the book was the #1 New York bestseller.
 
***It added a line of red text beneath the previous header to announce that the book was the #1 New York bestseller.
 
**The text was:
 
**The text was:
Line 1,431: Line 687:
 
**Ended while [[1451: Background Screens]] was up [http://web.archive.org/web/20141125234520/http://xkcd.com/ 2014-11-25].
 
**Ended while [[1451: Background Screens]] was up [http://web.archive.org/web/20141125234520/http://xkcd.com/ 2014-11-25].
  
===2014-09-04 - what if? book out===
+
====2014-09-04 - what if? book out====
 
*[http://web.archive.org/web/20140904150600/http://xkcd.com/ 2014-09-04]
 
*[http://web.archive.org/web/20140904150600/http://xkcd.com/ 2014-09-04]
 
**[[1416: Pixels]] was up when it changed from the [[#2014-09-02 - what if? book out today|book is out today]].
 
**[[1416: Pixels]] was up when it changed from the [[#2014-09-02 - what if? book out today|book is out today]].
**This was two days after the ''[[What If? (book)|What If?]]'' book came out.
+
**This was two days after the [[what if?]] book came out.
 
***It only removed to today from the previous header, that had only been up two days.
 
***It only removed to today from the previous header, that had only been up two days.
 
**The text was:
 
**The text was:
Line 1,441: Line 697:
 
**Ended while [[1428: Move Fast and Break Things]] was up [http://web.archive.org/web/20141001130827/http://xkcd.com/ 2014-09-01].
 
**Ended while [[1428: Move Fast and Break Things]] was up [http://web.archive.org/web/20141001130827/http://xkcd.com/ 2014-09-01].
  
===2014-09-02 - what if? book out today===
+
====2014-09-02 - what if? book out today====
 
*[http://web.archive.org/web/20140902125802/http://xkcd.com/ 2014-09-02]
 
*[http://web.archive.org/web/20140902125802/http://xkcd.com/ 2014-09-02]
 
**[[1415: Ballooning]] was up when it changed from the [[#2014-07-23 - what if? book tour|book tour header]].
 
**[[1415: Ballooning]] was up when it changed from the [[#2014-07-23 - what if? book tour|book tour header]].
**This was the day the ''[[What If? (book)|What If?]]'' book came out. [[Cueball]] standing to the left of the text with arms raised shouts this out.. The word Book is underlined and blue to indicate a link.
+
**This was the day the [[what if?]] book came out. [[Cueball]] standing to the left of the text with arms raised shouts this out.. The word Book is underlined and blue to indicate a link.
 
**The text was:
 
**The text was:
 
***My <u>book</u> is out today!
 
***My <u>book</u> is out today!
Line 1,450: Line 706:
 
**Ended while [[1416: Pixels]] was still [http://web.archive.org/web/20140903134518/http://xkcd.com/ 2014-09-03].
 
**Ended while [[1416: Pixels]] was still [http://web.archive.org/web/20140903134518/http://xkcd.com/ 2014-09-03].
  
===2014-07-23 - what if? book tour===
+
====2014-07-23 - what if? book tour====
 
*[http://web.archive.org/web/20140723180600/http://xkcd.com/ 2014-07-23]
 
*[http://web.archive.org/web/20140723180600/http://xkcd.com/ 2014-07-23]
 
**[[1398: Snake Facts]]
 
**[[1398: Snake Facts]]
**This was a promotion of his book tour for the ''[[What If? (book)|What If?]]'' book made by [[Cueball]] standing to the left of the text with arms raised. Several parts of the text was underlined and blue to indicate links.
+
**This was a promotion of his book tour for the [[what if?]] book made by [[Cueball]] standing to the left of the text with arms raised. Several parts of the text was underlined and blue to indicate links.
 
**The text was:
 
**The text was:
 
***I'm going on a <u>book tour!</u> click <u>here</u> for a list of stops.
 
***I'm going on a <u>book tour!</u> click <u>here</u> for a list of stops.
Line 1,459: Line 715:
 
**The entire image was a link to the [[Blag]] post: [https://blog.xkcd.com/2014/07/22/what-if-book-tour/ What If book tour!].
 
**The entire image was a link to the [[Blag]] post: [https://blog.xkcd.com/2014/07/22/what-if-book-tour/ What If book tour!].
 
***Later Randall commented on this lacking ability in the comic: [[1572: xkcd Survey]].
 
***Later Randall commented on this lacking ability in the comic: [[1572: xkcd Survey]].
***He also mentions it in one of the [[#xkcd_Header_text#2019-07-09_-_Drawings_from_How_To|promotions]] for his [[How To]] book.
 
***He much later he again mentions that html is hard, thus explaining why the entire image is a link instead of the actual blue highlighted link in one of the promotions for [[xkcd_Header_text#2022-08-11_-_Preorder_What_if.3F_2_-_with_image|what if? 2]].
 
 
**Ended while [[1415: Ballooning]] was still up [http://web.archive.org/web/20140901113916/http://xkcd.com/ 2014-09-01].
 
**Ended while [[1415: Ballooning]] was still up [http://web.archive.org/web/20140901113916/http://xkcd.com/ 2014-09-01].
  
===2014-03-13 - what if? announced===
+
====2014-03-13 - what if? announced====
 
*[http://web.archive.org/web/20140313070951/http://xkcd.com/ 2014-03-13]
 
*[http://web.archive.org/web/20140313070951/http://xkcd.com/ 2014-03-13]
 
**[[1341: Types of Editors]] was up.
 
**[[1341: Types of Editors]] was up.
**This was the first promotion of Randall's new ''[[What If? (book)|What If?]]'' book which is shown next to two lines of text.
+
**This was the first promotion of Randall's new [[what if?]] book which is shown next to two lines of text.
 
**The text was:
 
**The text was:
 
***News:
 
***News:
Line 1,473: Line 727:
 
**Ended while [[1397: Luke]] was up [http://web.archive.org/web/20140722142115/http://xkcd.com/ 2014-07-22].
 
**Ended while [[1397: Luke]] was up [http://web.archive.org/web/20140722142115/http://xkcd.com/ 2014-07-22].
  
===2014-01-09 - Back to standard text===
+
====Changes not documented yet 1====
*[https://web.archive.org/web/20140109190927/http://www.xkcd.com/ 2014-01-09]
+
*Before the above was up till [http://web.archive.org/web/20140312041127/http://xkcd.com/ 2014-03-12]:
**When [[1314: Photos]] was still up when the text returned to the standard xkcd header:
+
**xkcd updates every Monday, Wednesday, and Friday.  
***xkcd updates every Monday, Wednesday, and Friday.
+
*More changes could be earlier than this.
**It stayed until [https://web.archive.org/web/20140312070248/http://xkcd.com/ 2014-03-12] when [[1340: Unique Date]] was up, a bit more than two months.
 
 
 
===2013-12-21 - Deadline for Christmas shipping has passed===
 
*[https://web.archive.org/web/20131221043417/http://www.xkcd.com/ 2013-12-21]
 
**It changed when [[1306: Sigil Cycle]] came out.
 
**This came up when it was too close to Christmas in 2013 for shipping to arrive in time for Christmas. And Randall makes a note of this, but lets people know that they could still buy presents...
 
**The text was
 
***The deadline for guaranteed Christmas shipping has passed, but if you order something from the [http://store.xkcd.com/ xkcd store], we'll get it to you as fast as possible!
 
**Ended when [[1314: Photos]] was up on [https://web.archive.org/web/20140108181520/http://www.xkcd.com/ 2014-01-08].
 
 
 
===2013-12-06 - Empty header===
 
*[https://web.archive.org/web/20131206213503/http://xkcd.com/ 2013-12-06]
 
**It changed when [[1300: Galilean Moons]] came out.
 
***There just where no header text. This has not happened since. It looks really weird.
 
**Ended when [[1305: Undocumented Feature]] was up on [https://web.archive.org/web/20131220005306/http://xkcd.com/ 2013-12-20].
 
 
 
===Changes not documented yet 3===
 
*More changes will for sure be here between this and the one below.
 
 
 
====Interesting links in the Archive 3====
 
*Just put the link here with a date and maybe a short note:
 
*[https://web.archive.org/web/20131205202730/http://xkcd.com/ 2013-12-05]: Xmas sale before above
 
*[https://web.archive.org/web/20130315162227/http://xkcd.com:80/ 2013-03-15]: Empty follows below
 
 
 
===2013-03-15 - Empty header===
 
*[https://web.archive.org/web/20130315162227/http://xkcd.com:80/ 2013-03-15]
 
**It changed while [[1186: Bumblebees]] was on the front page.
 
***After the text saying a comic would be delayed disappeared no text replaced this.
 
***So the header was left empty!
 
**This lasted until [https://web.archive.org/web/20130318072820/http://xkcd.com/ 2013-03-18] while [[1187: Aspect Ratio]] was up.
 
 
 
===2013-03-13 - Comic will be delayed===
 
*[https://web.archive.org/web/20130313133631/http://xkcd.com/ 2013-03-13]
 
**It changed when [[1184: Circumference Formula]] came out, likely because the next comic was delayed.
 
***But there is a gap of three days before where no archived version exist, so cannot say if there where more than a few hours with this text.
 
**The text:
 
***The comic will be delayed until late morning EDT.
 
**Ended when [[1185: Ineffective Sorts]] was up on [https://web.archive.org/web/20130313175306/http://xkcd.com:80/ 2013-03-13].
 
***That was later same day as the first archived version. But could have been longer as mentioned above.
 
 
 
===2012-11-26 - xkcd store===
 
*[https://web.archive.org/web/20121126235628/http://xkcd.com/1138/ 2012-11-26]
 
**It changed while [[1138: Heatmap]] was up.
 
***Notice that the above link is not from the main page, but from {{xkcd|1138}}.
 
***There was a gap of five days in the archive of the main page.
 
***The first day that it was archived from the front page was on [https://web.archive.org/web/20121201111432/http://xkcd.com/ 2012-12-01], while [[1141: Two Years]] was up.
 
**The standard header text is replaced with an image that makes it seem like a rip is being torn in the white region where the text used to be. Beneath the white material that has now been ripped, some text can partly be seen. It is possible to read it.
 
**The text:
 
***xkcd store
 
****The image is a link to the [http://store.xkcd.com/ xkcd store] (tadaaa!)
 
**Ended when [[1183: Rose Petals]] was up on  [https://web.archive.org/web/20130311073948/http://xkcd.com:80/1183/ 2013-03-11]
 
***The above link is from {{xkcd|1183}}.
 
***Last time the front page was archived with it was though on [https://web.archive.org/web/20130309010403/http://xkcd.com/ 2013-03-09].
 
 
 
===2012-10-24 - Back to standard text===
 
*[https://web.archive.org/web/20121024082017/http://xkcd.com:80/ 2012-10-24]
 
**While [[1124: Law of Drama]] was on the front the header returned to the standard xkcd header:
 
***xkcd updates every Monday, Wednesday, and Friday.
 
**It stayed until [https://web.archive.org/web/20121126035129/http://xkcd.com:80/ 2012-11-26]  when [[1138: Heatmap]] was up, a few days more than a month.
 
 
 
===2012-10-17 - New What-If - Lightning===
 
*[https://web.archive.org/web/20121017232102/http://xkcd.com/1121/ 2012-10-17]
 
**Probably while [[1122: Electoral Precedent]] was up.
 
***But the link above showing it was up on the 2012-10-17 is from the previous comics page {{xkcd|1121}} [[1121: Identity]].
 
***But the first version archived with this header is saved on  [https://web.archive.org/web/20121018082304/http://xkcd.com/ 2012-10-18]
 
**Randall promotes another New What-If article.
 
***See the ''[[what if? (blog)|what if?]]'' article ''{{what if|16|Today's topic: Lightning}}''.
 
**The text
 
***New What-If article:
 
***[http://what-if.xkcd.com/16/ What if lightning struck while you were ...]
 
**This lasted until [https://web.archive.org/web/20121023023404/http://xkcd.com/1121/ 2012-10-23] when [[1124: Law of Drama]] was on the front page
 
***This link is though from {{xkcd|1121}}.
 
***The last this version was archived on the front page was the day before on [https://web.archive.org/web/20121022120008/http://xkcd.com:80/ 2012-10-22].
 
 
 
===2012-10-10 - New What-If - Mariana Trench Explosion===
 
*[https://web.archive.org/web/20121010003837/http://xkcd.com/ 2012-10-10]
 
**[[1118: Microsoft]] was still up at this time.
 
**Randall promotes another New What-If article.
 
***See the ''[[what if? (blog)|what if?]]'' article ''{{what if|15|Mariana Trench Explosion}}''.
 
**The text
 
***New What-If article:
 
***[http://what-if.xkcd.com/15/ What if you set off a nuclear bomb in the Mariana Trench?].
 
**This lasted until [https://web.archive.org/web/20121016055538/http://xkcd.com:80/ 2012-10-16] when [[1121: Identity]] was up.
 
 
 
===2012-10-02 - This week's What-If - Short Answer Section===
 
*[https://web.archive.org/web/20121002231724/http://www.xkcd.com/ 2012-10-02]
 
**[[1115: Sky]] was still up at this time.
 
**Randall promotes another New What-If article.
 
***See the ''[[what if? (blog)|what if?]]'' article ''{{what if|14|Short Answer Section}}''.
 
**The text
 
***In this week's What-If article I [https://what-if.xkcd.com/14/ answer multiple reader questions].
 
**This lasted until [https://web.archive.org/web/20121008112434/http://xkcd.com/ 2012-10-08] when [[1118: Microsoft]] was up.
 
 
 
===2012-09-26 - New What-If - Laser Pointer===
 
*[https://web.archive.org/web/20120926163111/http://xkcd.com/1108/ 2012-09-26]
 
**[[1113: Killed in Action]] was up at this time.
 
***The link above showing it happened on the 26th is from {{xkcd|1108}}
 
***The first day this version was archived on the front page was on [https://web.archive.org/web/20120928003838/http://xkcd.com:80/ 2012-09-28]
 
**Randall promotes another New What-If article.
 
***See the ''[[what if? (blog)|what if?]]'' article ''{{what if|13|Laser Pointer}}''.
 
**The text
 
***New What-If article:
 
***[http://what-if.xkcd.com/13/ If everyone aimed a laser pointer at the Moon at once, would it change color?]
 
**This lasted until [https://web.archive.org/web/20121001080517/http://xkcd.com/ 2012-10-01] when [[1115: Sky]] was up.
 
 
 
===2012-09-18 - what-if.xkcd.com - Raindrop===
 
*[https://web.archive.org/web/20120918143653/http://www.xkcd.com/1108/ 2012-09-18]
 
**[[1109: Refrigerator]] was still up at this time.
 
***The link above showing it happened on the 18th is from {{xkcd|1108}}
 
***The first day this version was archived on the front page was on [https://web.archive.org/web/20120919015232/http://xkcd.com/ 2012-09-19]
 
**Randall promotes another What-If article on the what-if page.
 
***See the the ''[[what if? (blog)|what if?]]'' article ''{{what if|12|Raindrop}}''.
 
**The text
 
***what-if.xkcd.com: [https://what-if.xkcd.com/12/  What if all of a storm's water fell in a single raindrop?].
 
**This lasted until [https://web.archive.org/web/20120925090123/http://xkcd.com:80/ 2012-09-25] when [[1112: Think Logically]] was up.
 
 
 
===Changes not documented yet 2===
 
*The above is the last documented.
 
**There will for sure be more changes earlier than this.
 
 
 
====Interesting links in the Archive 2====
 
*Just put the link here with a date and maybe a short note:
 
*[https://web.archive.org/web/20120917052827/http://xkcd.com:80/ 2012-09-17]: What if Droppings ends.
 
*[https://web.archive.org/web/20120718231719/http://www.xkcd.com/ 2012-07-18] Next stores header text
 
 
 
===2012-07-10 - New: what-if.xkcd.com===
 
*[https://web.archive.org/web/20120710114846/http://xkcd.com/1078/ 2012-07-10]
 
**This was a special change happening over a few days. The above "new" header text from the given date is actually shown on the previous comic [[1078: Knights]].
 
***Another example from [https://web.archive.org/web/20120710072249/http://xkcd.com:80/1070 2012-07-10] is shown for [[1070: Words for Small Sets]].
 
**The comic on the main page released on [https://web.archive.org/web/20120709045709/http://xkcd.com:80/ 2012-07-09] was [[1079: United Shapes]], but that comic had a [[xkcd_Header_text#United_Shapes|unique header text]] upon its release.
 
***So both on the 9th as shown above and on [https://web.archive.org/web/20120710114846/http://xkcd.com/1078/ 2012-07-10] the header text was different on the front than on all other pages.
 
****As can be read in the link above, the new header text actually got incorporated into the unique text, so that after the next comic was released on [https://web.archive.org/web/20120711234408/http://xkcd.com/1079/ 2012-07-11] the current new header text and a smaller version of the original unique header text was now shown on the Unites Shapes page.
 
****{{xkcd|1079|And it was never changed back}}.
 
**The first version of the new text from the 10th was only active one day:
 
***The text:
 
****New site: what-if.xkcd.com, where I abuse science to answer hypothetical questions. I'll answer a new question every Tuesday.
 
*****The link was not an active link. And this was never shown on the front page, but on all other comics.
 
**Already on [https://web.archive.org/web/20120711223349/http://xkcd.com/1078/ 2012-07-11] when [[1080: Visual Field]] was released the new header changed a bit
 
***At this time it most have been shown on the front page, but the link above is again from [[1078: Knights]].
 
****For some reason the front page was not saved on either the 11th or 12th, so no version of the front page with Visual Field exist
 
****The first archived version of the front page with this new header text was from [https://web.archive.org/web/20120713154207/http://xkcd.com/ 2012-07-13] when [[1081: Argument Victory]] was on the front page.
 
**The final text:
 
***New: [http://what-if.xkcd.com/1/ what-if.xkcd.com]: abusing science to answer hypothetical questions.
 
***I'll answer a new reader question every Tuesday.
 
****This time the link was active and directs to the new ''[[what if? (blog)|what if?]]'' blog and its first entry {{what if|1|Relativistic Baseball}}
 
**The whole idea was that Randall released the new what if? blog on the 10th of July 2012. And thus would like to make a promotion of it.
 
***And then he timed it so poorly that the front page had a different header than the rest of the comics.
 
***It was so annoying for him that he actually changed the header for Unites Shapes manually so that page also showed the new link. Maybe even before it left the front page, but that has not been documented in the archive.
 
***And then he forgot about it when the header changed for all the other comics, so it is now a relic of the promotion of his first what if release.
 
**The what if promotion continued for a long time, but the final version from above only lasted until 17th at the latest. There is again no archived versions of the front page from the 15th, 16th or 17th.
 
***The last time it was archived on the front page was [https://web.archive.org/web/20120714062857/http://xkcd.com/ 2012-07-14], when [[1081: Argument Victory]] was still up.
 
***But on [https://web.archive.org/web/20120715070938/http://xkcd.com:80/1081/ 2012-07-15] it was still shown on the page for Argument Victory and same for [https://web.archive.org/web/20120716235458/https://www.xkcd.com/998/ 2012-07-16] on [[998: 2012]]
 
****So seemed it stayed up while [[1082: Geology]] was up on the 16-17/7.
 
 
 
===2012-04-09 - Standard text plus store link===
 
*[https://web.archive.org/web/20120409190952/http://xkcd.com/1026/ 2012-04-09]
 
**It changed when [[1040: Lakes and Oceans]] came up.
 
***The above link to prove this is though from comic {{xkcd|1026}} [[1026: Compare and Contrast]] the first to be found that where archived on the 9th.
 
***The first archived version on the main page is from [https://web.archive.org/web/20120411053543/https://xkcd.com/ 2012-04-11] when [[1041: Whites of Their Eyes]] was up.
 
***There where no archived version of the front page on the 9th or 10th while Lake and Oceans was up. So it was also first on the 11th that this new text could be seen, but only when it had moved to its own page number [https://web.archive.org/web/20120411052948/http://xkcd.com/1040/ 1040].
 
****The change probably came because of this special comic, which may became a [https://store.xkcd.com/collections/posters/products/lakes-oceans-poster poster].
 
**The update was to add a promotion for the store under the standard header text.
 
**The text
 
***XKCD updates every Monday, Wednesday, and Friday.
 
***You can get prints, posters, and t-shirts in the [http://store.xkcd.com/ store].
 
**This lasted until [https://web.archive.org/web/20120709004956/http://www.xkcd.com/ 2012-07-09] when [[1078: Knights]] was up, exactly three months, so although not only the standard text, the standard text was first for three months and three days, see [[#2012-04-05 - Back to standard text|below]].
 
 
 
===2012-04-05 - Back to standard text===
 
*[https://web.archive.org/web/20120405195956/http://www.xkcd.com/1021/ 2012-04-05]
 
**While [[1038: Fountain]] was on the front the header returned to the standard xkcd header:
 
***xkcd updates every Monday, Wednesday, and Friday.
 
**The link above to prove the date is seen on [[1021: Business Plan]].
 
***The first archived version on front page is from [https://web.archive.org/web/20120406111048/http://xkcd.com/ 2012-04-06], when [[1039: RuBisCO]] was up.
 
***A version showing Fountain with this can be found on it's own page {{xkcd|1038}} on [https://web.archive.org/web/20120406085618/http://xkcd.com:80/1038/ 2012-04-06].
 
****When it was archived while on the front page it still had the previous header on [https://web.archive.org/web/20120404210927/http://xkcd.com:80/ 2012-04-05].
 
**It stayed up, unchanged, until [https://web.archive.org/web/20120408200414/http://xkcd.com:80/ 2012-04-08] when [[1039: RuBisCO]] was up. So only three days.
 
***But [[#2012-04-09- Standard text plus store link|the change]] did not remove the standard text but just added a link to the store. And this version, still with the standard text at the top stayed for three more months.
 
 
 
===2012-03-28 - Visiting Newport News===
 
*[https://web.archive.org/web/20120328103319/http://xkcd.com/ 2012-03-28]
 
**[[1035: Cadbury Eggs]] was on the front when it changed.
 
***From the end of March 2012, there is a problem with the archived versions of xkcd, so they do not load properly and do not include the comic picture.
 
**It was to announce a talk Randall gave at his old school.
 
**The text:
 
***I'm [https://blog.xkcd.com/2012/03/22/im-visiting-cnu-on-april-4th/ visiting] Newport News, VA next week, where I'll be speaking at CNU, my old school. If you want to come, reserve a seat [https://web.archive.org/web/20120329214411/http://www.cnu.edu/pcs/xkcd/index.asp here]!
 
****The first link it to a post in the [[Blag]]: [https://blog.xkcd.com/2012/03/22/im-visiting-cnu-on-april-4th/ I’m visiting CNU on April 4th].
 
****The other link is no longer working, but the link above goes to an archived version.
 
**There was a special situation with this header text. For three days it was not on the front page, as the [[:Category:April fools' comics|April fools' comic]] [[1037: Umwelt]] came out and stayed from April 1st to April 3rd on the front page.
 
***This comic had it's own [[#Unique header text|unique header text]] from the start, one that has [[#Umwelt|stayed like this]] since!
 
****So from [https://web.archive.org/web/20120401151639/http://xkcd.com:80/ 2012-04-01] to [https://web.archive.org/web/20120403223453/http://www.xkcd.com/ 2012-04-03] the front page had another header:
 
*****You can get posters, prints, and t-shirts in the [https://store.xkcd.com/ xkcd store].
 
***But all the other comics kept the Visiting header on all three days as shown here:
 
****[https://web.archive.org/web/20120401214214/http://xkcd.com:80/1036/ 2012-04-01] from[[1036: Reviews]].
 
****[https://web.archive.org/web/20120402150258/http://xkcd.com/1019  2012-04-02] from [[1019: First Post]].
 
****[https://web.archive.org/web/20120403164523/http://xkcd.com:80/1036/ 2012-04-03] from [[1036: Reviews]].
 
*****The one from the 2nd of April was hardest to find, but the most important, because that was clearly in the time period where Umwelt was up, thus definitely proving that the other pages had a different header than the front page. This is rare.
 
**It returned to the front page on [https://web.archive.org/web/20120404210927/http://xkcd.com:80/ 2012-04-04] and stayed up until [https://web.archive.org/web/20120405195956/http://www.xkcd.com/1021/ 2012-04-05] when [[1038: Fountain]] was up.
 
***The link from the 5th though is from {{xkcd|1021}} [[1021: Business Plan]], the only comic archived on the 5ht to be found.
 
****The previous link was the last time it was archived while on the front page.
 
 
 
===2012-03-12 - xkcd Holistic Browser===
 
*[https://web.archive.org/web/20120312185125/http://xkcd.com/ 2012-03-12]
 
**[[1028: Communication]] was up at the time.
 
***From here the archive doesn't load the page properly so it is really boring to document. This goes for both first and last day of this text.
 
**The text:
 
***New: [https://web.archive.org/web/20120318153220/http://holistic.xkcd.com/ holistic.xkcd.com], the least useful web navigation tool ever.
 
****The link is now dead, but the link above is to an archived version.
 
****On that page there is the following text:
 
*****The XKCD Holistic Browser
 
*****Because we are all one.
 
*****Type a web address
 
*****and you'll be taken to one
 
*****typed by someone else.
 
*****URL:
 
*****Warning: This allows strangers to direct your browser!
 
*****They may send you to pages containing
 
*****porn, viruses, or Justin Bieber fanfiction.
 
*****At the very least, turn on private browsing.
 
**During the time this header was active the comic [[1031: s/keyboard/leopard/]] came out.
 
***It had its own [[xkcd_Header_text#Unique_header_text|unique header text]] which thus replaced this text on the front page for two days.
 
***But it did not replace it on all the other pages so this was the active header text during the entire period, see more here: [[xkcd_Header_text#s.2Fkeyboard.2Fleopard.2F|s/keyboard/leopard/]]
 
**This lasted till [https://web.archive.org/web/20120327050311/http://xkcd.com/1033 2012-03-27] while [[1034: Share Buttons]] was up.
 
**But the last archived version with this on the front page was the day before [https://web.archive.org/web/20120326180811/http://xkcd.com// 2012-03-26].
 
***The link from 27th is from an archived version of [[1033: Formal Logic]].
 
 
 
===Changes not documented yet 1===
 
*The above is the last documented.
 
**There will for sure be more changes earlier than this.
 
*[https://web.archive.org/web/20120311135259/http://xkcd.com/ 2012-03-11] Text before. For next entry below...
 
  
[[Category:Problematic pages]]
+
[[Category:Meta]]
[[Category:Design of xkcd.com]]
 
{{xkcdmeta}}
 

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