Time in Antarctica
Antarctica sits on every line of longitude, due to the South Pole being situated near the middle of the continent. Theoretically Antarctica would be located in all time zones, however areas south of the Antarctic Circle experience extreme day-night cycles near the times of the June and December solstices, making it difficult to determine which time zone would be appropriate. For practical purposes time zones are usually based on territorial claims, however many stations use the time of the country they are owned by or the time zone of their supply base (e.g. McMurdo Station and Amundsen–Scott South Pole Station use New Zealand time due to their main supply base being Christchurch, New Zealand). Many areas have no time zone since nothing is decided and there are not even any temporary settlements that have any clocks. They are simply labeled with UTC time.
The file zone.tab of the tz 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
|AQ||-6448-06406||Antarctica/Palmer||Palmer Station, Anvers Island||−04:00||yes||Palmer Land|
|AQ||-6734-06808||Antarctica/Rothera||Rothera Station, Adelaide Island||−03:00||no||Graham Land|
|AQ||-7824+10654||Antarctica/Vostok||Vostok Station, Lake Vostok||+06:00||no||Inland Antarctica, Queen Maud Land|
|AQ||-690022+0393524||Antarctica/Syowa||Syowa Station, E Ongul I||+03:00||no||Queen Maud Land, Enderby Land|
|AQ||-6736+06253||Antarctica/Mawson||Mawson Station, Holme Bay||+05:00||no||Mac. Robertson Land|
|AQ||-6835+07758||Antarctica/Davis||Davis Station, Vestfold Hills||+07:00||no||Wilkes Land|
|AQ||-6617+11031||Antarctica/Casey||Casey Station, Bailey Peninsula||+08:00||no||Wilkes Land|
|AQ||-6640+14001||Antarctica/DumontDUrville||Dumont-d'Urville Station, Terre Adelie||+10:00||no||Adélie Land, Victoria Land|
|AQ||-7750+16636||Antarctica/McMurdo||McMurdo, South Pole, Scott (New Zealand time)||+12:00||yes||Ross Dependency|
|Active stations using time zones not in the tz database|
|-7201+0232||Troll station||+00:00||no?||Queen Maud Land|
The coordinates are latitude and longitude, and for each there are 2 or 3 digits for degrees and 2 digits for minutes, and for some 2 digits for seconds.
Daylight saving time
For the most part, daylight saving time (DST) is not observed in Antarctica due to the fact that 95 percent of the continent is located south of the Antarctic Circle and the midnight sun phenomenon renders the use of DST unnecessary, and it would further complicate communication with the claimant countries in the northern hemisphere.
However a few regions such as the Ross Dependency and Palmer Land observe the time and use of DST of the countries they are supplied from, Chile and New Zealand. The areas have DST during the southern summer, when there is the northern winter, including January.
- "Local Time → Antarctica @ Time Genie". Timegenie.com. Retrieved 2013-07-24.
- "Current local time in Antarctica – South Pole". Timeanddate.com. 2013-04-07. Retrieved 2013-07-24.
- Forskingsstasjonen Troll (Norwegian Polar Institute) (The Norwegian text under the webcamera says "The time zone where Troll is located, is 2 hours behind Norwegian time". That has to refer to DST in Norway since the webcamera with clock is regularly updated, showing UTC+0, which also matches the map and the longitude)