xref: /freebsd/contrib/tzdata/antarctica (revision 46226b0162ba03986b1de2c790804b37dd8e64d6)
1# tzdb data for Antarctica and environs
2
3# This file is in the public domain, so clarified as of
4# 2009-05-17 by Arthur David Olson.
5
6# From Paul Eggert (1999-11-15):
7# To keep things manageable, we list only locations occupied year-round; see
8# COMNAP - Stations and Bases
9# http://www.comnap.aq/comnap/comnap.nsf/P/Stations/
10# and
11# Summary of the Peri-Antarctic Islands (1998-07-23)
12# http://www.spri.cam.ac.uk/bob/periant.htm
13# for information.
14# Unless otherwise specified, we have no time zone information.
15
16# FORMAT is '-00' and STDOFF is 0 for locations while uninhabited.
17
18# Argentina - year-round bases
19# Belgrano II, Confin Coast, -770227-0343737, since 1972-02-05
20# Carlini, Potter Cove, King George Island, -6414-0602320, since 1982-01
21# Esperanza, Hope Bay, -6323-05659, since 1952-12-17
22# Marambio, -6414-05637, since 1969-10-29
23# Orcadas, Laurie I, -6016-04444, since 1904-02-22
24# San Martín, Barry I, -6808-06706, since 1951-03-21
25#	(except 1960-03 / 1976-03-21)
26
27# Australia - territories
28# Heard Island, McDonald Islands (uninhabited)
29#	previously sealers and scientific personnel wintered
30#	Margaret Turner reports
31#	https://web.archive.org/web/20021204222245/http://www.dstc.qut.edu.au/DST/marg/daylight.html
32#	(1999-09-30) that they're UT +05, with no DST;
33#	presumably this is when they have visitors.
34#
35# year-round bases
36# Casey, Bailey Peninsula, -6617+11032, since 1969
37# Davis, Vestfold Hills, -6835+07759, since 1957-01-13
38#	(except 1964-11 - 1969-02)
39# Mawson, Holme Bay, -6736+06253, since 1954-02-13
40
41# From Steffen Thorsen (2009-03-11):
42# Three Australian stations in Antarctica have changed their time zone:
43# Casey moved from UTC+8 to UTC+11
44# Davis moved from UTC+7 to UTC+5
45# Mawson moved from UTC+6 to UTC+5
46# The changes occurred on 2009-10-18 at 02:00 (local times).
47#
48# Government source: (Australian Antarctic Division)
49# http://www.aad.gov.au/default.asp?casid=37079
50#
51# We have more background information here:
52# https://www.timeanddate.com/news/time/antarctica-new-times.html
53
54# From Steffen Thorsen (2010-03-10):
55# We got these changes from the Australian Antarctic Division: ...
56#
57# - Casey station reverted to its normal time of UTC+8 on 5 March 2010.
58# The change to UTC+11 is being considered as a regular summer thing but
59# has not been decided yet.
60#
61# - Davis station will revert to its normal time of UTC+7 at 10 March 2010
62# 20:00 UTC.
63#
64# - Mawson station stays on UTC+5.
65#
66# Background:
67# https://www.timeanddate.com/news/time/antartica-time-changes-2010.html
68
69# From Steffen Thorsen (2016-10-28):
70# Australian Antarctica Division informed us that Casey changed time
71# zone to UTC+11 in "the morning of 22nd October 2016".
72
73# From Steffen Thorsen (2020-10-02, as corrected):
74# Based on information we have received from the Australian Antarctic
75# Division, Casey station and Macquarie Island station will move to Tasmanian
76# daylight savings time on Sunday 4 October. This will take effect from 0001
77# hrs on Sunday 4 October 2020 and will mean Casey and Macquarie Island will
78# be on the same time zone as Hobart.  Some past dates too for this 3 hour
79# time change back and forth between UTC+8 and UTC+11 for Casey:
80# - 2018 Oct  7 4:00 - 2019 Mar 17 3:00 - 2019 Oct  4 3:00 - 2020 Mar  8 3:00
81# and now - 2020 Oct  4 0:01
82
83# From Paul Eggert (2023-12-20):
84# Transitions from 2021 on are taken from:
85# https://www.timeanddate.com/time/zone/antarctica/casey
86# retrieved at various dates.
87
88# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
89Zone Antarctica/Casey	 0	-	-00	1969
90			 8:00	-	%z	2009 Oct 18  2:00
91			11:00	-	%z	2010 Mar  5  2:00
92			 8:00	-	%z	2011 Oct 28  2:00
93			11:00	-	%z	2012 Feb 21 17:00u
94			 8:00	-	%z	2016 Oct 22
95			11:00	-	%z	2018 Mar 11  4:00
96			 8:00	-	%z	2018 Oct  7  4:00
97			11:00	-	%z	2019 Mar 17  3:00
98			 8:00	-	%z	2019 Oct  4  3:00
99			11:00	-	%z	2020 Mar  8  3:00
100			 8:00	-	%z	2020 Oct  4  0:01
101			11:00	-	%z	2021 Mar 14  0:00
102			 8:00	-	%z	2021 Oct  3  0:01
103			11:00	-	%z	2022 Mar 13  0:00
104			 8:00	-	%z	2022 Oct  2  0:01
105			11:00	-	%z	2023 Mar  9  3:00
106			 8:00	-	%z
107Zone Antarctica/Davis	0	-	-00	1957 Jan 13
108			7:00	-	%z	1964 Nov
109			0	-	-00	1969 Feb
110			7:00	-	%z	2009 Oct 18  2:00
111			5:00	-	%z	2010 Mar 10 20:00u
112			7:00	-	%z	2011 Oct 28  2:00
113			5:00	-	%z	2012 Feb 21 20:00u
114			7:00	-	%z
115Zone Antarctica/Mawson	0	-	-00	1954 Feb 13
116			6:00	-	%z	2009 Oct 18  2:00
117			5:00	-	%z
118# References:
119# Casey Weather (1998-02-26)
120# http://www.antdiv.gov.au/aad/exop/sfo/casey/casey_aws.html
121# Davis Station, Antarctica (1998-02-26)
122# http://www.antdiv.gov.au/aad/exop/sfo/davis/video.html
123# Mawson Station, Antarctica (1998-02-25)
124# http://www.antdiv.gov.au/aad/exop/sfo/mawson/video.html
125
126# Belgium - year-round base
127# Princess Elisabeth, Queen Maud Land, -713412+0231200, since 2007
128
129# Brazil - year-round base
130# Ferraz, King George Island, -6205+05824, since 1983/4
131
132# Bulgaria - year-round base
133# St. Kliment Ohridski, Livingston Island, -623829-0602153, since 1988
134
135# Chile - year-round bases and towns
136# Escudero, South Shetland Is, -621157-0585735, since 1994
137# Frei Montalva, King George Island, -6214-05848, since 1969-03-07
138# O'Higgins, Antarctic Peninsula, -6319-05704, since 1948-02
139# Prat, -6230-05941
140# Villa Las Estrellas (a town), around the Frei base, since 1984-04-09
141# These locations employ Region of Magallanes time; use
142# TZ='America/Punta_Arenas'.
143
144# China - year-round bases
145# Great Wall, King George Island, -6213-05858, since 1985-02-20
146# Zhongshan, Larsemann Hills, Prydz Bay, -6922+07623, since 1989-02-26
147
148# France - year-round bases (also see "France & Italy")
149#
150# From Antoine Leca (1997-01-20):
151# Time data entries are from Nicole Pailleau at the IFRTP
152# (French Institute for Polar Research and Technology).
153# She confirms that French Southern Territories and Terre Adélie bases
154# don't observe daylight saving time, even if Terre Adélie supplies came
155# from Tasmania.
156#
157# French Southern Territories with year-round inhabitants
158#
159# Alfred Faure, Possession Island, Crozet Islands, -462551+0515152, since 1964;
160#	sealing & whaling stations operated variously 1802/1911+;
161#	see Asia/Dubai.
162#
163# Martin-de-Viviès, Amsterdam Island, -374105+0773155, since 1950
164# Port-aux-Français, Kerguelen Islands, -492110+0701303, since 1951;
165#	whaling & sealing station operated 1908/1914, 1920/1929, and 1951/1956
166#
167# St Paul Island - near Amsterdam, uninhabited
168#	fishing stations operated variously 1819/1931
169#
170# Kerguelen - see Indian/Maldives.
171#
172# year-round base in the main continent
173# Dumont d'Urville - see Pacific/Port_Moresby.
174
175# France & Italy - year-round base
176# Concordia, -750600+1232000, since 2005
177# https://en.wikipedia.org/wiki/Concordia_Station
178# Can use Asia/Singapore, which it has agreed with since inception.
179
180# Germany - year-round base
181# Neumayer III, -704080-0081602, since 2009
182
183# India - year-round bases
184# Bharati, -692428+0761114, since 2012
185# Maitri, -704558+0114356, since 1989
186
187# Italy - year-round base (also see "France & Italy")
188# Zuchelli, Terra Nova Bay, -744140+1640647, since 1986
189
190# Japan - year-round bases
191# See Asia/Riyadh.
192
193# S Korea - year-round base
194# Jang Bogo, Terra Nova Bay, -743700+1641205 since 2014
195# King Sejong, King George Island, -6213-05847, since 1988
196
197# New Zealand - claims
198# Balleny Islands (never inhabited)
199# Scott Island (never inhabited)
200#
201# year-round base
202# Scott Base, Ross Island, since 1957-01.
203# See Pacific/Auckland.
204
205# Norway - territories
206# Bouvet (never inhabited)
207#
208# claims
209# Peter I Island (never inhabited)
210#
211# year-round base
212# Troll, Queen Maud Land, -720041+0023206, since 2005-02-12
213#
214# From Paul-Inge Flakstad (2014-03-10):
215# I recently had a long dialog about this with the developer of timegenie.com.
216# In the absence of specific dates, he decided to choose some likely ones:
217#   GMT +1 - From March 1 to the last Sunday in March
218#   GMT +2 - From the last Sunday in March until the last Sunday in October
219#   GMT +1 - From the last Sunday in October until November 7
220#   GMT +0 - From November 7 until March 1
221# The dates for switching to and from UTC+0 will probably not be absolutely
222# correct, but they should be quite close to the actual dates.
223#
224# From Paul Eggert (2014-03-21):
225# The CET-switching Troll rules require zic from tz 2014b or later, so as
226# suggested by Bengt-Inge Larsson comment them out for now, and approximate
227# with only UTC and CEST.  Uncomment them when 2014b is more prevalent.
228#
229# Rule	NAME	FROM	TO	-	IN	ON	AT	SAVE	LETTER/S
230#Rule	Troll	2005	max	-	Mar	 1	1:00u	1:00	+01
231Rule	Troll	2005	max	-	Mar	lastSun	1:00u	2:00	+02
232#Rule	Troll	2005	max	-	Oct	lastSun	1:00u	1:00	+01
233#Rule	Troll	2004	max	-	Nov	 7	1:00u	0:00	+00
234# Remove the following line when uncommenting the above '#Rule' lines.
235Rule	Troll	2004	max	-	Oct	lastSun	1:00u	0:00	+00
236# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
237Zone Antarctica/Troll	0	-	-00	2005 Feb 12
238			0:00	Troll	%s
239
240# Poland - year-round base
241# Arctowski, King George Island, -620945-0582745, since 1977
242
243# Romania - year-bound base
244# Law-Racoviță, Larsemann Hills, -692319+0762251, since 1986
245
246# Russia - year-round bases
247# Bellingshausen, King George Island, -621159-0585337, since 1968-02-22
248# Mirny, Davis coast, -6633+09301, since 1956-02
249# Molodezhnaya, Alasheyev Bay, -6740+04551,
250#	year-round from 1962-02 to 1999-07-01
251# Novolazarevskaya, Queen Maud Land, -7046+01150,
252#	year-round from 1960/61 to 1992
253
254# Vostok, since 1957-12-16, temporarily closed 1994-02/1994-11
255# From Craig Mundell (1994-12-15):
256# http://quest.arc.nasa.gov/antarctica/QA/computers/Directions,Time,ZIP
257# Vostok, which is one of the Russian stations, is set on the same
258# time as Moscow, Russia.
259#
260# From Lee Hotz (2001-03-08):
261# I queried the folks at Columbia who spent the summer at Vostok and this is
262# what they had to say about time there:
263# "in the US Camp (East Camp) we have been on New Zealand (McMurdo)
264# time, which is 12 hours ahead of GMT. The Russian Station Vostok was
265# 6 hours behind that (although only 2 miles away, i.e. 6 hours ahead
266# of GMT). This is a time zone I think two hours east of Moscow. The
267# natural time zone is in between the two: 8 hours ahead of GMT."
268#
269# From Paul Eggert (2001-05-04):
270# This seems to be hopelessly confusing, so I asked Lee Hotz about it
271# in person.  He said that some Antarctic locations set their local
272# time so that noon is the warmest part of the day, and that this
273# changes during the year and does not necessarily correspond to mean
274# solar noon.  So the Vostok time might have been whatever the clocks
275# happened to be during their visit.  So we still don't really know what time
276# it is at Vostok.
277#
278# From Zakhary V. Akulov (2023-12-17 22:00:48 +0700):
279# ... from December, 18, 2023 00:00 by my decision the local time of
280# the Antarctic research base Vostok will correspond to UTC+5.
281# (2023-12-19): We constantly interact with Progress base, with company who
282# builds new wintering station, with sledge convoys, with aviation - they all
283# use UTC+5. Besides, difference between Moscow time is just 2 hours now, not 4.
284# (2023-12-19, in response to the question "Has local time at Vostok
285# been UTC+6 ever since 1957, or has it changed before?"): No. At least
286# since my antarctic career start, 10 years ago, Vostok base has UTC+7.
287# (In response to a 2023-12-18 question "from 02:00 to 00:00 today"): This.
288#
289# From Paul Eggert (2023-12-18):
290# For lack of better info, guess Vostok was at +07 from founding through today,
291# except when closed.
292
293# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
294Zone Antarctica/Vostok	0	-	-00	1957 Dec 16
295			7:00	-	%z	1994 Feb
296			0	-	-00	1994 Nov
297			7:00	-	%z	2023 Dec 18  2:00
298			5:00	-	%z
299
300# S Africa - year-round bases
301# Marion Island, -4653+03752
302# SANAE IV, Vesleskarvet, Queen Maud Land, -714022-0025026, since 1997
303
304# Ukraine - year-round base
305# Vernadsky (formerly Faraday), Galindez Island, -651445-0641526, since 1954
306
307# United Kingdom
308#
309# British Antarctic Territories (BAT) claims
310# South Orkney Islands
311#	scientific station from 1903
312#	whaling station at Signy I 1920/1926
313# South Shetland Islands
314#
315# year-round bases
316# Bird Island, South Georgia, -5400-03803, since 1983
317# Deception Island, -6259-06034, whaling station 1912/1931,
318#	scientific station 1943/1967,
319#	previously sealers and a scientific expedition wintered by accident,
320#	and a garrison was deployed briefly
321# Halley, Coates Land, -7535-02604, since 1956-01-06
322#	Halley is on a moving ice shelf and is periodically relocated
323#	so that it is never more than 10km from its nominal location.
324# Rothera, Adelaide Island, -6734-6808, since 1976-12-01
325#
326# From Paul Eggert (2002-10-22)
327# <http://webexhibits.org/daylightsaving/g.html> says Rothera is -03 all year.
328#
329# Zone	NAME		STDOFF	RULES	FORMAT	[UNTIL]
330Zone Antarctica/Rothera	0	-	-00	1976 Dec  1
331			-3:00	-	%z
332
333# Uruguay - year round base
334# Artigas, King George Island, -621104-0585107
335
336# USA - year-round bases
337#
338# Palmer, Anvers Island, since 1965 (moved 2 miles in 1968)
339# See 'southamerica' for Antarctica/Palmer, since it uses South American DST.
340#
341# McMurdo Station, Ross Island, since 1955-12
342# Amundsen-Scott South Pole Station, continuously occupied since 1956-11-20
343#
344# From Chris Carrier (1996-06-27):
345# Siple, the first commander of the South Pole station,
346# stated that he would have liked to have kept GMT at the station,
347# but that he found it more convenient to keep GMT+12
348# as supplies for the station were coming from McMurdo Sound,
349# which was on GMT+12 because New Zealand was on GMT+12 all year
350# at that time (1957).  (Source: Siple's book 90° South.)
351#
352# From Susan Smith
353# http://www.cybertours.com/whs/pole10.html
354# (1995-11-13 16:24:56 +1300, no longer available):
355# We use the same time as McMurdo does.
356# And they use the same time as Christchurch, NZ does....
357# One last quirk about South Pole time.
358# All the electric clocks are usually wrong.
359# Something about the generators running at 60.1hertz or something
360# makes all of the clocks run fast.  So every couple of days,
361# we have to go around and set them back 5 minutes or so.
362# Maybe if we let them run fast all of the time, we'd get to leave here sooner!!
363#
364# See Pacific/Auckland.
365