103103# - 2018 Oct 7 4:00 - 2019 Mar 17 3:00 - 2019 Oct 4 3:00 - 2020 Mar 8 3:00
104104# and now - 2020 Oct 4 0:01
105105
106+ # From Paul Eggert (2023-12-20):
107+ # Transitions from 2021 on are taken from:
108+ # https://www.timeanddate.com/time/zone/antarctica/casey
109+ # retrieved at various dates.
110+
106111# Zone NAME STDOFF RULES FORMAT [UNTIL]
107112Zone Antarctica/Casey 0 - -00 1969
108113 8:00 - +08 2009 Oct 18 2:00
@@ -116,7 +121,12 @@ Zone Antarctica/Casey 0 - -00 1969
116121 8:00 - +08 2019 Oct 4 3:00
117122 11:00 - +11 2020 Mar 8 3:00
118123 8:00 - +08 2020 Oct 4 0:01
119- 11:00 - +11
124+ 11:00 - +11 2021 Mar 14 0:00
125+ 8:00 - +08 2021 Oct 3 0:01
126+ 11:00 - +11 2022 Mar 13 0:00
127+ 8:00 - +08 2022 Oct 2 0:01
128+ 11:00 - +11 2023 Mar 9 3:00
129+ 8:00 - +08
120130Zone Antarctica/Davis 0 - -00 1957 Jan 13
121131 7:00 - +07 1964 Nov
122132 0 - -00 1969 Feb
@@ -263,7 +273,50 @@ Zone Antarctica/Troll 0 - -00 2005 Feb 12
263273# year-round from 1960/61 to 1992
264274
265275# Vostok, since 1957-12-16, temporarily closed 1994-02/1994-11
266- # See Asia/Urumqi.
276+ # From Craig Mundell (1994-12-15):
277+ # http://quest.arc.nasa.gov/antarctica/QA/computers/Directions,Time,ZIP
278+ # Vostok, which is one of the Russian stations, is set on the same
279+ # time as Moscow, Russia.
280+ #
281+ # From Lee Hotz (2001-03-08):
282+ # I queried the folks at Columbia who spent the summer at Vostok and this is
283+ # what they had to say about time there:
284+ # "in the US Camp (East Camp) we have been on New Zealand (McMurdo)
285+ # time, which is 12 hours ahead of GMT. The Russian Station Vostok was
286+ # 6 hours behind that (although only 2 miles away, i.e. 6 hours ahead
287+ # of GMT). This is a time zone I think two hours east of Moscow. The
288+ # natural time zone is in between the two: 8 hours ahead of GMT."
289+ #
290+ # From Paul Eggert (2001-05-04):
291+ # This seems to be hopelessly confusing, so I asked Lee Hotz about it
292+ # in person. He said that some Antarctic locations set their local
293+ # time so that noon is the warmest part of the day, and that this
294+ # changes during the year and does not necessarily correspond to mean
295+ # solar noon. So the Vostok time might have been whatever the clocks
296+ # happened to be during their visit. So we still don't really know what time
297+ # it is at Vostok.
298+ #
299+ # From Zakhary V. Akulov (2023-12-17 22:00:48 +0700):
300+ # ... from December, 18, 2023 00:00 by my decision the local time of
301+ # the Antarctic research base Vostok will correspond to UTC+5.
302+ # (2023-12-19): We constantly interact with Progress base, with company who
303+ # builds new wintering station, with sledge convoys, with aviation - they all
304+ # use UTC+5. Besides, difference between Moscow time is just 2 hours now, not 4.
305+ # (2023-12-19, in response to the question "Has local time at Vostok
306+ # been UTC+6 ever since 1957, or has it changed before?"): No. At least
307+ # since my antarctic career start, 10 years ago, Vostok base has UTC+7.
308+ # (In response to a 2023-12-18 question "from 02:00 to 00:00 today"): This.
309+ #
310+ # From Paul Eggert (2023-12-18):
311+ # For lack of better info, guess Vostok was at +07 from founding through today,
312+ # except when closed.
313+
314+ # Zone NAME STDOFF RULES FORMAT [UNTIL]
315+ Zone Antarctica/Vostok 0 - -00 1957 Dec 16
316+ 7:00 - +07 1994 Feb
317+ 0 - -00 1994 Nov
318+ 7:00 - +07 2023 Dec 18 2:00
319+ 5:00 - +05
267320
268321# S Africa - year-round bases
269322# Marion Island, -4653+03752
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