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+ | <div class="plainlinks"> | ||
{{comic | {{comic | ||
| number = 1335 | | number = 1335 | ||
+ | | before = ''Explainxkcd note: The image below is accelerated to show a full day's spin in approximately 10 seconds. The actual comic completes one revolution per day. <br/>For the current state, see [http://xkcd.com/now/ http://xkcd.com/now]'' | ||
| date = February 26, 2014 | | date = February 26, 2014 | ||
| title = Now | | title = Now | ||
| image = now.gif | | image = now.gif | ||
− | | titletext = This image stays roughly in sync with the day (assuming the Earth continues spinning). Shortcut: xkcd.com/now | + | | titletext = This image stays roughly in sync with the day (assuming the Earth continues spinning). Shortcut: [http://xkcd.com/now xkcd.com/now] |
}} | }} | ||
− | + | </div> | |
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==Explanation== | ==Explanation== | ||
− | The picture is divided in 24 segments representing the 24 hours of the day. | + | The picture is divided in 24 segments representing the 24 hours of the day. The break between segments is not visible at noon or midnight because of the words, but presumably exists. |
− | The picture rotates by 3.75 {{w|degree (angle)|degrees}} every 15 minutes, as does the Earth so that it is constantly up to date in showing which regions are currently at which times of day. The picture change seems to happen | + | The picture rotates by 3.75 {{w|degree (angle)|degrees}} every 15 minutes, as does the Earth, so that it is constantly up to date in showing which regions are currently at which times of day. The picture change seems to happen half-way through a 15-minute time increment (that is, at 7½, 22½, 37½, and 52½ minutes after each hour), so that the picture is always correct for the nearest multiple of 15 minutes. |
− | The map projection of the earth in the middle of the picture shows an {{w|azimuthal equidistant projection}} with the {{w|South Pole}} in the center. This is unusual, as | + | The map projection of the earth in the middle of the picture shows an {{w|azimuthal equidistant projection}} with the {{w|South Pole}} in the center. This is unusual, as the projection typically puts the north pole in the center, but necessary in order for it to rotate clockwise. [[Randall]] was playing on projections before in [[977: Map Projections]]. |
− | The list of cities and countries doesn't match the map exactly - notice how the continent of Australia is shifted | + | The list of cities and countries doesn't match the map exactly - notice how the continent of Australia is shifted far to the left of the words "most Australian cities". This is because the map is centered relative to the {{w|time zone}}s and the local variations therein. The map shows the current (February 2014) configuration of time zones with respect to {{w|daylight saving time}} (also known as summer time), which is being observed at the time of the comic's initial release in parts of Australia, New Zealand, Brazil, and other countries not named in this comic. If the map is to stay accurate through the year, the location of place names will have to move over the next few months as parts of the southern hemisphere go off DST and parts of the northern hemisphere go onto it, but we don't yet know whether Randall will bother to include this. |
− | In many countries "{{w|business hours}}" are considered to be from 9 am to 5 pm. With some exceptions, including emergencies, it is generally considered rude to place a {{w|telephone}} call to someone's residence when most people are asleep; Randall portrays this period as extending from 10 pm to 8 am. This may be a reference to the 10 pm "cutoff" time [http://www.youtube.com/watch?v=L0WeQJW-H3Y discussed] in an episode of "Curb Your Enthusiasm." | + | In many countries "{{w|business hours}}" are considered to be from 9 am to 5 pm. With some exceptions, including emergencies, it is generally considered rude to place a {{w|telephone}} call to someone's residence during the hours when most people are asleep; Randall portrays this time period as extending from 10 pm to 8 am. This may be a reference to the 10 pm "cutoff" time [http://www.youtube.com/watch?v=L0WeQJW-H3Y discussed] in an episode of "Curb Your Enthusiasm." |
− | + | On midnight at UTC we can see this situation: | |
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*00:00 UTC {{w|Greenwich Mean Time}} | *00:00 UTC {{w|Greenwich Mean Time}} | ||
::UK, Portugal | ::UK, Portugal | ||
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*02:00 UTC {{w|Eastern European Time}} | *02:00 UTC {{w|Eastern European Time}} | ||
::Eastern Europe, many countries like Bulgaria, Romania or Greece | ::Eastern Europe, many countries like Bulgaria, Romania or Greece | ||
− | ::The {{w|Levant}} | + | ::The {{w|Levant}} |
::Egypt | ::Egypt | ||
*03:00 UTC {{w|UTC+03:00}} (East Africa Time, Eastern Europe Forward Time, and Arabia Standard Time) | *03:00 UTC {{w|UTC+03:00}} (East Africa Time, Eastern Europe Forward Time, and Arabia Standard Time) | ||
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::Iraq, Kuwait, Saudi Arabia, and more. | ::Iraq, Kuwait, Saudi Arabia, and more. | ||
::Iran is at {{w|Iran Standard Time}}, using an offset of UTC+03:30 | ::Iran is at {{w|Iran Standard Time}}, using an offset of UTC+03:30 | ||
− | *04:00 UTC {{w|UTC+04:00}} | + | *04:00 UTC {{w|UTC+04:00}} |
− | ::{{w|Moscow Time}} | + | ::{{w|Moscow Time}} |
::United Arab Emirates, Mauritius, and more | ::United Arab Emirates, Mauritius, and more | ||
::Afghanistan is at {{w|Time in Afghanistan}}, using an offset of UTC+04:30 | ::Afghanistan is at {{w|Time in Afghanistan}}, using an offset of UTC+04:30 | ||
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::Line Islands, belonging to Kiribati | ::Line Islands, belonging to Kiribati | ||
*15:00 UTC {{w|UTC−09:00}} | *15:00 UTC {{w|UTC−09:00}} | ||
− | ::{{W|Time in Alaska|Alaska}} (some islands of Alaska is at -10:00 and a few city's are at -08:00) | + | ::{{W|Time in Alaska|Alaska}} (some islands of Alaska is at -10:00 and a few city's are at -08:00) |
::French Polynesia | ::French Polynesia | ||
*16:00 UTC {{w|UTC−08:00}} or {{w|Pacific Time Zone}} | *16:00 UTC {{w|UTC−08:00}} or {{w|Pacific Time Zone}} | ||
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::But also Cuba, Haiti, Panama and much more countries | ::But also Cuba, Haiti, Panama and much more countries | ||
*20:00 UTC {{w|UTC−04:00}} or {{w|Atlantic Time Zone}} | *20:00 UTC {{w|UTC−04:00}} or {{w|Atlantic Time Zone}} | ||
− | ::Canadian Maritimes: New Brunswick, Prince Edward Island, Nova Scotia. (Newfoundland uses {{w|UTC-03:30}}) | + | ::Canadian Maritimes: New Brunswick, Prince Edward Island, Nova Scotia. (Newfoundland uses {{w|UTC-03:30}} ) |
::Chile | ::Chile | ||
::Greenland | ::Greenland | ||
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:[The comic is a moving circle with a static outer ring.] | :[The comic is a moving circle with a static outer ring.] | ||
− | :[The outermost part of the static ring is divided in 22 segments representing the 24 hours of the day. The Noon (11 AM - 1 PM) and Midnight (11 PM - 1 AM) segments cover two hours which are not segmented. The ring is divided so it is yellow from 6 AM to 6 PM and dark grey on the other half | + | :[The outermost part of the static ring is divided in 22 segments representing the 24 hours of the day. The Noon (11 AM - 1 PM) and Midnight (11 PM - 1 AM) segments cover two hours which are not segmented. The ring is divided so it is yellow from 6 AM to 6 PM and dark grey on the other half] |
::Noon - 6 PM - Midnight - 6 AM | ::Noon - 6 PM - Midnight - 6 AM | ||
:[The innermost part of the static ring is light grey and divided in two sections that cower from 9 AM to 5 PM and from 10 PM to 8 AM respectively. They contain descriptions of the time intervals.] | :[The innermost part of the static ring is light grey and divided in two sections that cower from 9 AM to 5 PM and from 10 PM to 8 AM respectively. They contain descriptions of the time intervals.] | ||
− | ::Business hours (9-5) | + | ::Business hours (9-5) |
::Rude to call | ::Rude to call | ||
− | :[The rest of the image consist of a rotating part | + | :[The rest of the image consist of a rotating part] |
:[On the innermost part of the circle is the Earth as seen from the south pole. Each continent has a different color. The colors are | :[On the innermost part of the circle is the Earth as seen from the south pole. Each continent has a different color. The colors are | ||
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::North America | ::North America | ||
− | :[On the outermost ring of the moving circle are written names of regions, countries and cities of the Earth over the part of the map in which time zone they belong. All the text is color coded to match the color of the continent they belong to as given on the central map. The text is written in four lines. Below the names are sorted by color and reading from left to right first - and only sorting top to bottom if needed | + | :[On the outermost ring of the moving circle are written names of regions, countries and cities of the Earth over the part of the map in which time zone they belong. All the text is color coded to match the color of the continent they belong to as given on the central map. The text is written in four lines. Below the names are sorted by color and reading from left to right first - and only sorting top to bottom if needed] |
:[Europe - Red text:] | :[Europe - Red text:] | ||
− | ::UK - Most of Europe - Eastern Europe | + | ::UK - Most of Europe - Eastern Europe |
:[Africa - Cyan text:] | :[Africa - Cyan text:] | ||
− | ::West Africa - Nigeria - Egypt - East Africa | + | ::West Africa - Nigeria - Egypt - East Africa |
:[Asia - Green text:] | :[Asia - Green text:] | ||
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==Implementations== | ==Implementations== | ||
− | There are currently several implementations | + | There are currently several implementations for different platforms displaying the Now clock: |
− | + | ===Windows=== | |
− | Windows | + | Automatical wallpaper updating [https://github.com/leipert/xkcd-now-clock]. |
− | + | ===Android=== | |
− | + | An Android widget [https://play.google.com/store/apps/details?id=net.phillab.xkcd_now]. | |
− | + | ===Web=== | |
− | + | A website additionally displaying time zones [http://www.xkcdnow.com/]. | |
− | + | ===Generic=== | |
− | Android | + | An [https://github.com/BruceJohnJennerLawso/xkcd-Now/releases/tag/1.02 offline version of the comic] made using C++ and SFML. |
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{{comic discussion}} | {{comic discussion}} | ||
[[Category:Comics with color]] | [[Category:Comics with color]] | ||
[[Category:Dynamic comics]] | [[Category:Dynamic comics]] | ||
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