Update time zone data files to tzdata release 2009a: introduces Asia/Kathmandu

as the preferred spelling of that zone name, corrects historical DST information for Switzerland and Cuba.
2024-12-27 08:39:28 +08:00 · 2009-01-29 19:59:59 +00:00 · 2009-01-29 19:59:59 +00:00 · 204db566b4
commit 204db566b4
parent 0d65eea3da
5 changed files with 78 additions and 17 deletions
--- a/src/timezone/data/asia
+++ b/src/timezone/data/asia
@ -1,4 +1,4 @@
-# @(#)asia	8.24
+# @(#)asia	8.25
 # <pre>

 # This data is by no means authoritative; if you think you know better,
@ -1474,7 +1474,7 @@ Zone	Asia/Choibalsan	7:38:00 -	LMT	1905 Aug

 # Nepal
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
-Zone	Asia/Katmandu	5:41:16 -	LMT	1920
+Zone	Asia/Kathmandu	5:41:16 -	LMT	1920
 			5:30	-	IST	1986
 			5:45	-	NPT	# Nepal Time

--- a/src/timezone/data/backward
+++ b/src/timezone/data/backward
@ -1,4 +1,4 @@
-# @(#)backward	8.6
+# @(#)backward	8.7

 # This file provides links between current names for time zones
 # and their old names.  Many names changed in late 1993.
@ -24,6 +24,7 @@ Link	America/St_Thomas	America/Virgin
 Link	Asia/Ashgabat		Asia/Ashkhabad
 Link	Asia/Chongqing		Asia/Chungking
 Link	Asia/Dhaka		Asia/Dacca
+Link	Asia/Kathmandu		Asia/Katmandu
 Link	Asia/Kolkata		Asia/Calcutta
 Link	Asia/Macau		Asia/Macao
 Link	Asia/Jerusalem		Asia/Tel_Aviv
--- a/src/timezone/data/europe
+++ b/src/timezone/data/europe
@ -1,4 +1,4 @@
-# @(#)europe	8.18
+# @(#)europe	8.20
 # <pre>

 # This data is by no means authoritative; if you think you know better,
@ -2313,11 +2313,64 @@ Zone Europe/Stockholm	1:12:12 -	LMT	1879 Jan  1
 # mean time in preference to apparent time -- Geneva from 1780 ....
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 # From Whitman (who writes ``Midnight?''):
-Rule	Swiss	1940	only	-	Nov	 2	0:00	1:00	S
-Rule	Swiss	1940	only	-	Dec	31	0:00	0	-
+# Rule	Swiss	1940	only	-	Nov	 2	0:00	1:00	S
+# Rule	Swiss	1940	only	-	Dec	31	0:00	0	-
 # From Shanks & Pottenger:
-Rule	Swiss	1941	1942	-	May	Sun>=1	2:00	1:00	S
-Rule	Swiss	1941	1942	-	Oct	Sun>=1	0:00	0	-
+# Rule	Swiss	1941	1942	-	May	Sun>=1	2:00	1:00	S
+# Rule	Swiss	1941	1942	-	Oct	Sun>=1	0:00	0	-
+
+# From Alois Treindl (2008-12-17):
+# I have researched the DST usage in Switzerland during the 1940ies.
+#
+# As I wrote in an earlier message, I suspected the current tzdata values
+# to be wrong. This is now verified.
+#
+# I have found copies of the original ruling by the Swiss Federal
+# government, in 'Eidgen[o]ssische Gesetzessammlung 1941 and 1942' (Swiss
+# federal law collection)...
+#
+# DST began on Monday 5 May 1941, 1:00 am by shifting the clocks to 2:00 am
+# DST ended on Monday 6 Oct 1941, 2:00 am by shifting the clocks to 1:00 am.
+#
+# DST began on Monday, 4 May 1942 at 01:00 am
+# DST ended on Monday, 5 Oct 1942 at 02:00 am
+#
+# There was no DST in 1940, I have checked the law collection carefully.
+# It is also indicated by the fact that the 1942 entry in the law
+# collection points back to 1941 as a reference, but no reference to any
+# other years are made.
+#
+# Newspaper articles I have read in the archives on 6 May 1941 reported
+# about the introduction of DST (Sommerzeit in German) during the previous
+# night as an absolute novelty, because this was the first time that such
+# a thing had happened in Switzerland.
+#
+# I have also checked 1916, because one book source (Gabriel, Traite de
+# l'heure dans le monde) claims that Switzerland had DST in 1916. This is
+# false, no official document could be found. Probably Gabriel got misled
+# by references to Germany, which introduced DST in 1916 for the first time.
+#
+# The tzdata rules for Switzerland must be changed to:
+# Rule  Swiss   1941    1942    -       May     Mon>=1  1:00    1:00    S
+# Rule  Swiss   1941    1942    -       Oct     Mon>=1  2:00    0       -
+#
+# The 1940 rules must be deleted.
+#
+# One further detail for Switzerland, which is probably out of scope for
+# most users of tzdata:
+# The zone file
+# Zone    Europe/Zurich   0:34:08 -       LMT     1848 Sep 12
+#                          0:29:44 -       BMT     1894 Jun #Bern Mean Time
+#                          1:00    Swiss   CE%sT   1981
+#                          1:00    EU      CE%sT
+# describes all of Switzerland correctly, with the exception of
+# the Cantone Geneve (Geneva, Genf). Between 1848 and 1894 Geneve did not
+# follow Bern Mean Time but kept its own local mean time.
+# To represent this, an extra zone would be needed.
+
+# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
+Rule	Swiss	1941	1942	-	May	Mon>=1	1:00	1:00	S
+Rule	Swiss	1941	1942	-	Oct	Mon>=1	2:00	0	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Europe/Zurich	0:34:08 -	LMT	1848 Sep 12
 			0:29:44	-	BMT	1894 Jun # Bern Mean Time
--- a/src/timezone/data/northamerica
+++ b/src/timezone/data/northamerica
@ -1,4 +1,4 @@
-# @(#)northamerica	8.24
+# @(#)northamerica	8.26
 # <pre>

 # also includes Central America and the Caribbean
@ -1742,9 +1742,13 @@ Zone America/Dawson_Creek -8:00:56 -	LMT	1884
 # The individual that answered the phone confirmed that the clocks did not
 # move at the end of daylight saving on October 29/2006.  He also told me that
 # the clocks did not move this past weekend (March 11/2007)....
-#
-# America/Resolute should use the "Canada" Rule up to October 29/2006.
-# After that it should be fixed on Eastern Standard Time until further notice.
+
+# From Chris Walton (2008-11-13):
+# ...the residents of Resolute believe that they are changing "time zones"
+# twice a year.  In winter months, local time is qualified with "Eastern
+# Time" which is really "Eastern Standard Time (UTC-5)".  In summer
+# months, local time is qualified with "Central Time" which is really
+# "Central Daylight Time (UTC-5)"...

 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 Rule	NT_YK	1918	only	-	Apr	14	2:00	1:00	D
@ -1772,11 +1776,14 @@ Zone America/Iqaluit	0	-	zzz	1942 Aug # Frobisher Bay est.
 			-6:00	Canada	C%sT	2000 Oct 29 2:00
 			-5:00	Canada	E%sT
 # aka Qausuittuq
+# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
+Rule	Resolute 2006	max	-	Nov	Sun>=1	2:00	0	ES
+Rule	Resolute 2007	max	-	Mar	Sun>=8	2:00	0	CD
 Zone America/Resolute	0	-	zzz	1947 Aug 31 # Resolute founded
 			-6:00	NT_YK	C%sT	2000 Oct 29 2:00
 			-5:00	-	EST	2001 Apr  1 3:00
 			-6:00	Canada	C%sT	2006 Oct 29 2:00
-			-5:00	-	EST
+			-5:00	Resolute	%sT
 # aka Kangiqiniq
 Zone America/Rankin_Inlet 0	-	zzz	1957 # Rankin Inlet founded
 			-6:00	NT_YK	C%sT	2000 Oct 29 2:00
@ -2280,7 +2287,7 @@ Rule	Cuba	1996	only	-	Oct	 6	0:00s	0	S
 Rule	Cuba	1997	only	-	Oct	12	0:00s	0	S
 Rule	Cuba	1998	1999	-	Mar	lastSun	0:00s	1:00	D
 Rule	Cuba	1998	2003	-	Oct	lastSun	0:00s	0	S
-Rule	Cuba	2000	2006	-	Apr	Sun>=1	0:00s	1:00	D
+Rule	Cuba	2000	2004	-	Apr	Sun>=1	0:00s	1:00	D
 Rule	Cuba	2006	max	-	Oct	lastSun	0:00s	0	S
 Rule	Cuba	2007	only	-	Mar	Sun>=8	0:00s	1:00	D
 Rule	Cuba	2008	max	-	Mar	Sun>=15	0:00s	1:00	D
--- a/src/timezone/data/zone.tab
+++ b/src/timezone/data/zone.tab
@ -1,4 +1,4 @@
-# @(#)zone.tab	8.21
+# @(#)zone.tab	8.26
 #
 # TZ zone descriptions
 #
@ -116,7 +116,7 @@ CA	+4901-08816	America/Nipigon	Eastern Time - Ontario & Quebec - places that did
 CA	+4823-08915	America/Thunder_Bay	Eastern Time - Thunder Bay, Ontario
 CA	+6344-06828	America/Iqaluit	Eastern Time - east Nunavut - most locations
 CA	+6608-06544	America/Pangnirtung	Eastern Time - Pangnirtung, Nunavut
-CA	+744144-0944945	America/Resolute	Eastern Time - Resolute, Nunavut
+CA	+744144-0944945	America/Resolute	Eastern Standard Time - Resolute, Nunavut
 CA	+484531-0913718	America/Atikokan	Eastern Standard Time - Atikokan, Ontario and Southampton I, Nunavut
 CA	+624900-0920459	America/Rankin_Inlet	Central Time - central Nunavut
 CA	+4953-09709	America/Winnipeg	Central Time - Manitoba & west Ontario
@ -292,7 +292,7 @@ NG	+0627+00324	Africa/Lagos
 NI	+1209-08617	America/Managua
 NL	+5222+00454	Europe/Amsterdam
 NO	+5955+01045	Europe/Oslo
-NP	+2743+08519	Asia/Katmandu
+NP	+2743+08519	Asia/Kathmandu
 NR	-0031+16655	Pacific/Nauru
 NU	-1901-16955	Pacific/Niue
 NZ	-3652+17446	Pacific/Auckland	most locations