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Antarctica sits on every line of longitude because the South Pole is on 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, the time zone of their supply base is often utilised (e.g., McMurdo Station and Amundsen–Scott South Pole Station use New Zealand time due to their main supply base being Christchurch, New Zealand). In most areas south of 80 degrees latitude, Coordinated Universal Time is assumed despite the limited presence of clocks.

TZ database

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.

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.

Daylight saving time

For the most part, daylight saving time (DST) is not observed in Antarctica. The majority (95 percent) of the continent is located south of the Antarctic Circle, and the midnight 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 the Ross Dependency and, formerly, Palmer Land, observe the time and use of DST of the countries they are supplied from, New Zealand and Chile, respectively. The areas have DST during the southern summer, when there is the northern winter, including January.

References

1. ^ "Local Time → Antarctica @ Time Genie". Timegenie.com. Retrieved 2013-07-24.
2. Forskingsstasjonen Troll (Norwegian Polar Institute) (The Norwegian text under the webcamera says "The time zone where Troll is located, UTC+0, is 1 hours behind Norwegian time". Contacts with the Norwegian Polar Institute has revealed that they use UTC+2 (Norwegian DST) during the dark winter, for communication simplicity, since no airplanes fly anyway then)
3. "Time Zone & Clock Changes in Casey, Antarctica".

External links

• Claims
• Day-Night Cycle

v t e Antarctica
Geography	Antarctic sea ice Climate Climate change Heat waves Ice shelves Geology Glaciers Mountains Tundra Volcanoes Regions Biogeographic realm Antarctic Peninsula East Antarctica ice sheet shield Extreme points Floristic Kingdom Islands South Pole South magnetic pole West Antarctica ice sheet Bodies of Water Antarctic/Southern Ocean Lake CECs Lake Mercer Lake Vostok List of rivers McMurdo Sound Ross Sea Weddell Sea Life Flora Microorganisms Wildlife Birds Mammals Krill
History	Expeditions Heroic Age World War II Colonization COVID-19 pandemic Years
Politics	Council of Managers of National Antarctic Programs Military activity National programs Territorial claims Treaty System
Society	Antarctica Day Antarctic English Crime Demographics Economy Field camps Firefighting Flags Gateway cities Midwinter Day Protected areas Religion Research stations Telecommunications Time Tourism Transport Women
Famous explorers	Roald Amundsen Richard E. Byrd Douglas Mawson Ui-te-Rangiora (legendary) James Clark Ross Robert Falcon Scott Ernest Shackleton
Category Commons Index

• Time by continent
• Geography of Antarctica
• Government of Antarctica
• Culture of Antarctica
• Time zones