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-rw-r--r--contrib/tzdata/antarctica45
1 files changed, 36 insertions, 9 deletions
diff --git a/contrib/tzdata/antarctica b/contrib/tzdata/antarctica
index 70a5422a9e0a..763c27253c99 100644
--- a/contrib/tzdata/antarctica
+++ b/contrib/tzdata/antarctica
@@ -80,6 +80,11 @@
# - 2018 Oct 7 4:00 - 2019 Mar 17 3:00 - 2019 Oct 4 3:00 - 2020 Mar 8 3:00
# and now - 2020 Oct 4 0:01
+# From Paul Eggert (2023-12-20):
+# Transitions from 2021 on are taken from:
+# https://www.timeanddate.com/time/zone/antarctica/casey
+# retrieved at various dates.
+
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Antarctica/Casey 0 - -00 1969
8:00 - +08 2009 Oct 18 2:00
@@ -93,7 +98,12 @@ Zone Antarctica/Casey 0 - -00 1969
8:00 - +08 2019 Oct 4 3:00
11:00 - +11 2020 Mar 8 3:00
8:00 - +08 2020 Oct 4 0:01
- 11:00 - +11
+ 11:00 - +11 2021 Mar 14 0:00
+ 8:00 - +08 2021 Oct 3 0:01
+ 11:00 - +11 2022 Mar 13 0:00
+ 8:00 - +08 2022 Oct 2 0:01
+ 11:00 - +11 2023 Mar 9 3:00
+ 8:00 - +08
Zone Antarctica/Davis 0 - -00 1957 Jan 13
7:00 - +07 1964 Nov
0 - -00 1969 Feb
@@ -157,9 +167,7 @@ Zone Antarctica/Mawson 0 - -00 1954 Feb 13
# St Paul Island - near Amsterdam, uninhabited
# fishing stations operated variously 1819/1931
#
-# Zone NAME STDOFF RULES FORMAT [UNTIL]
-Zone Indian/Kerguelen 0 - -00 1950 # Port-aux-Français
- 5:00 - +05
+# Kerguelen - see Indian/Maldives.
#
# year-round base in the main continent
# Dumont d'Urville - see Pacific/Port_Moresby.
@@ -263,10 +271,29 @@ Zone Antarctica/Troll 0 - -00 2005 Feb 12
# changes during the year and does not necessarily correspond to mean
# solar noon. So the Vostok time might have been whatever the clocks
# happened to be during their visit. So we still don't really know what time
-# it is at Vostok. But we'll guess +06.
-#
+# it is at Vostok.
+#
+# From Zakhary V. Akulov (2023-12-17 22:00:48 +0700):
+# ... from December, 18, 2023 00:00 by my decision the local time of
+# the Antarctic research base Vostok will correspond to UTC+5.
+# (2023-12-19): We constantly interact with Progress base, with company who
+# builds new wintering station, with sledge convoys, with aviation - they all
+# use UTC+5. Besides, difference between Moscow time is just 2 hours now, not 4.
+# (2023-12-19, in response to the question "Has local time at Vostok
+# been UTC+6 ever since 1957, or has it changed before?"): No. At least
+# since my antarctic career start, 10 years ago, Vostok base has UTC+7.
+# (In response to a 2023-12-18 question "from 02:00 to 00:00 today"): This.
+#
+# From Paul Eggert (2023-12-18):
+# For lack of better info, guess Vostok was at +07 from founding through today,
+# except when closed.
+
+# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Antarctica/Vostok 0 - -00 1957 Dec 16
- 6:00 - +06
+ 7:00 - +07 1994 Feb
+ 0 - -00 1994 Nov
+ 7:00 - +07 2023 Dec 18 2:00
+ 5:00 - +05
# S Africa - year-round bases
# Marion Island, -4653+03752
@@ -318,7 +345,7 @@ Zone Antarctica/Rothera 0 - -00 1976 Dec 1
# but that he found it more convenient to keep GMT+12
# as supplies for the station were coming from McMurdo Sound,
# which was on GMT+12 because New Zealand was on GMT+12 all year
-# at that time (1957). (Source: Siple's book 90 Degrees South.)
+# at that time (1957). (Source: Siple's book 90° South.)
#
# From Susan Smith
# http://www.cybertours.com/whs/pole10.html
@@ -332,4 +359,4 @@ Zone Antarctica/Rothera 0 - -00 1976 Dec 1
# we have to go around and set them back 5 minutes or so.
# Maybe if we let them run fast all of the time, we'd get to leave here sooner!!
#
-# See 'australasia' for Antarctica/McMurdo.
+# See Pacific/Auckland.