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| UTC+00:00 | |
| UTC+03:00 | |
| UTC+06:00 | |
| UTC+07:00 | |
| UTC+08:00 | |
| UTC+10:00 | |
| UTC+12:00 | |
| UTC+13:00 | |
| UTC−06:00 | |
| UTC−03:00 |
Antarctica sits on everyline of longitude because theSouth Pole is on the continent. Theoretically, Antarctica would be located in all time zones; however, areas south of theAntarctic Circle experience extreme day-night cycles near the times of the June and Decembersolstices, making it difficult to determine which time zone would be most appropriate. For practical purposes time zones are usually based onterritorial claims; however, the time zone of their supply base is often utilised (e.g.,McMurdo Station andAmundsen–Scott South Pole Station useNew Zealand time due to their main supply base beingChristchurch, New Zealand).[1] In most areas south of 80 degrees latitude,Coordinated Universal Time (UTC) is assumed despite the limited presence of clocks.
The filezone.tab of thetz database contains the following zones, columns marked with * contain data from the file zone.tab. Only permanently inhabited stations are tracked by the tz database staff. Some summer-only stations with different time might exist.
| Country code* | Coordinates* | Zone name* | Comment* | UTC offset | Area covered | ||
|---|---|---|---|---|---|---|---|
| Standard time | DST | ||||||
| AQ | −6448 | Antarctica | Palmer | −03:00 | No | Palmer Land | |
| AQ | −6734 | Antarctica | Rothera | −03:00 | No | Graham Land | |
| AQ | −720041 | Antarctica | Troll | +00:00 | +02:00[2] | Queen Maud Land | |
| AQ | −690022 | Antarctica | Syowa | +03:00 | No | Queen Maud Land,Enderby Land | |
| AQ | −6736 | Antarctica | Mawson | +05:00 | No | Mac. Robertson Land | |
| AQ | −7824 | Antarctica | Vostok | +05:00 | No | Inland Antarctica,Queen Maud Land | |
| AQ | −6835 | Antarctica | Davis | +07:00 | No | Wilkes Land | |
| AQ | −6617 | Antarctica | Casey | +08:00 | No[3] | Wilkes Land | |
| AQ | −6640 | Antarctica | Dumont-d'Urville | +10:00 | No | Adélie Land,Victoria Land | |
| AU | −5430 | Antarctica | Macquarie Island | +10:00 | +11:00 | Macquarie Island | |
| AQ | −7750 | Antarctica | New Zealand time – McMurdo, South Pole | +12:00 | +13:00 | Ross Dependency | |
| AQ | Antarctica | +12:00 | +13:00 | South Pole | |||
The coordinates are latitude and longitude, and for each there are 2 or 3 digits for degrees, 2 digits for minutes and for some 2 digits for seconds.
For the most part,daylight saving time (DST) is not observed in Antarctica. The majority (95 percent) of the continent is located south of theAntarctic Circle, and themidnight sun phenomenon renders the observation of DST unnecessary. Its usage would also further complicate communication with the claimant countries in the Northern Hemisphere.
However, a few regions such as theRoss Dependency and, formerly,Palmer Land, observe the time and use of DST of the countries they are supplied from,New Zealand andChile, respectively.[1] The areas have DST during the southern summer, when there is the northern winter, including January.
