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Time in Antarctica is divided into 25 time zones, each corresponding roughly to 15 degrees of longitude, except for Yankee and McMurdo time zones, which are 7.5 degrees each.

Antarctic Time Zones[]

Time zones are named according to NATO military designations, with the following exceptions: "India" is replaced with "Ivan", "Lima" is replaced with "Liberty", and "Quebec" is replaced with "Quincy". This is to avoid the confusion that results from using actual place names. "Mike" is replaced with "McMurdo" domestically, although the former is used in international contexts, as well as to specify UTC+13 (Mike+1, as used at McMurdo and Scott research bases during the summer).

Zones used in Federation settlements[]

The following time zones are observed within urban and permanently-inhabited areas of the Federation:

Zones not used in Federation settlements[]

The following time zones are only observed along the Transantarctic Highway System and at way stations and road houses:

  • Sierra Time Zone: (ST; UTC-6)
  • Tango Time Zone: (TT; UTC-7)
  • Uniform Time Zone: (UT; UTC-8)
  • Whiskey Time Zone: (WT; UTC-10)
  • X-Ray Time Zone: (XT; UTC-11)

Daylight saving time[]

Daylight saving time is technically observed in the following areas:

  • Alyeska (all boroughs except the unorganized borough)
  • Amundsen (all settlements except Peary)
  • Bellinsgauzenia (Amery, Charles, and Ingrid oblasts, Devonport)
  • New South Greenland (Adelaides Borough and Ellsworth)
  • Polaria (Gottleib)
  • Victoria Land (All areas except Balto and Les Anges)

The areas listed above all observe a time zone that is one hour or more ahead of mean solar time, and thus observe daylight saving time year round. The seasonal practice of advancing the clocks one hour forward or backward is unnecessary in Antarctica, due to the fact that most of the continent receives daylight or darkness 24 hours per day, depending on season. Foreign research stations use this practice only to remain in sync with supply stations off-continent.

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