Update to tzdata version 2015a.

http://mm.icann.org/pipermail/tz-announce/2015-January/000028.html

Author: philr

data/NEWS

@@ -1,5 +1,57 @@
 News for the tz database
 
+Release 2015a - 2015-01-29 22:35:20 -0800
+
+  Changes affecting future time stamps
+
+    The Mexican state of Quintana Roo, represented by America/Cancun,
+    will shift from Central Time with DST to Eastern Time without DST
+    on 2015-02-01 at 02:00.  (Thanks to Steffen Thorsen and Gwillim Law.)
+
+    Chile will not change clocks in April or thereafter; its new standard time
+    will be its old daylight saving time.  This affects America/Santiago,
+    Pacific/Easter, and Antarctica/Palmer.  (Thanks to Juan Correa.)
+
+    New leap second 2015-06-30 23:59:60 UTC as per IERS Bulletin C 49.
+    (Thanks to Tim Parenti.)
+
+  Changes affecting past time stamps
+
+    Iceland observed DST in 1919 and 1921, and its 1939 fallback
+    transition was Oct. 29, not Nov. 29.  Remove incorrect data from
+    Shanks about time in Iceland between 1837 and 1908.
+
+    Some more zones have been turned into links, when they differed
+    from existing zones only for older time stamps.  As usual,
+    these changes affect UTC offsets in pre-1970 time stamps only.
+    Their old contents have been moved to the 'backzone' file.
+    The affected zones are: Asia/Aden, Asia/Bahrain, Asia/Kuwait,
+    and Asia/Muscat.
+
+  Changes affecting code
+
+    tzalloc now scrubs time zone abbreviations compatibly with the way
+    that tzset always has, by replacing invalid bytes with '_' and by
+    shortening too-long abbreviations.
+
+    tzselect ports to POSIX awk implementations, no longer mishandles
+    POSIX TZ settings when GNU awk is used, and reports POSIX TZ
+    settings to the user.  (Thanks to Stefan Kuhn.)
+
+  Changes affecting build procedure
+
+    'make check' now checks for links to links in the data.
+    One such link (for Africa/Asmera) has been fixed.
+    (Thanks to Stephen Colebourne for pointing out the problem.)
+
+  Changes affecting commentary
+
+    The leapseconds file commentary now mentions the expiration date.
+    (Problem reported by Martin Burnicki.)
+
+    Update Mexican Library of Congress URL.
+
+
 Release 2014j - 2014-11-10 17:37:11 -0800
 
   Changes affecting current and future time stamps

data/SOURCE

@@ -1,2 +1,2 @@
 The files in this directory were obtained from the IANA Time Zone Database
-http://www.iana.org/time-zones, version 2014j.
+http://www.iana.org/time-zones, version 2015a.

data/antarctica

@@ -47,8 +47,8 @@ Rule	ChileAQ	2009	only	-	Mar	Sun>=9	3:00u	0	-
 Rule	ChileAQ	2010	only	-	Apr	Sun>=1	3:00u	0	-
 Rule	ChileAQ	2011	only	-	May	Sun>=2	3:00u	0	-
 Rule	ChileAQ	2011	only	-	Aug	Sun>=16	4:00u	1:00	S
-Rule	ChileAQ	2012	max	-	Apr	Sun>=23	3:00u	0	-
-Rule	ChileAQ	2012	max	-	Sep	Sun>=2	4:00u	1:00	S
+Rule	ChileAQ	2012	2015	-	Apr	Sun>=23	3:00u	0	-
+Rule	ChileAQ	2012	2014	-	Sep	Sun>=2	4:00u	1:00	S
 
 # Argentina - year-round bases
 # Belgrano II, Confin Coast, -770227-0343737, since 1972-02-05
@@ -354,9 +354,10 @@ Zone Antarctica/Rothera	0	-	zzz	1976 Dec  1
 #
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone Antarctica/Palmer	0	-	zzz	1965
-			-4:00	ArgAQ	AR%sT	1969 Oct 5
+			-4:00	ArgAQ	AR%sT	1969 Oct  5
 			-3:00	ArgAQ	AR%sT	1982 May
-			-4:00	ChileAQ	CL%sT
+			-4:00	ChileAQ	CL%sT	2015 Apr 26 3:00u
+			-3:00	-	CLT
 #
 #
 # McMurdo Station, Ross Island, since 1955-12

data/asia

@@ -145,10 +145,7 @@ Zone	Asia/Baku	3:19:24 -	LMT	1924 May  2
 			4:00	Azer	AZ%sT
 
 # Bahrain
-# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
-Zone	Asia/Bahrain	3:22:20 -	LMT	1920     # Manamah
-			4:00	-	GST	1972 Jun
-			3:00	-	AST
+# See Asia/Qatar.
 
 # Bangladesh
 # From Alexander Krivenyshev (2009-05-13):
@@ -1731,9 +1728,7 @@ Zone	Asia/Pyongyang	8:23:00 -	LMT	1908 Apr  1
 ###############################################################################
 
 # Kuwait
-# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
-Zone	Asia/Kuwait	3:11:56 -	LMT	1950
-			3:00	-	AST
+# See Asia/Riyadh.
 
 # Laos
 # See Asia/Bangkok.
@@ -1954,12 +1949,7 @@ Zone	Asia/Kathmandu	5:41:16 -	LMT	1920
 			5:45	-	NPT	# Nepal Time
 
 # Oman
-
-# Milne says 3:54:24 was the meridian of the Muscat Tidal Observatory.
-
-# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
-Zone	Asia/Muscat	3:54:24 -	LMT	1920
-			4:00	-	GST
+# See Asia/Dubai.
 
 # Pakistan
 
@@ -2453,6 +2443,7 @@ Zone	Asia/Manila	-15:56:00 -	LMT	1844 Dec 31
 Zone	Asia/Qatar	3:26:08 -	LMT	1920     # Al Dawhah / Doha
 			4:00	-	GST	1972 Jun
 			3:00	-	AST
+Link Asia/Qatar Asia/Bahrain
 
 # Saudi Arabia
 #
@@ -2479,6 +2470,8 @@ Zone	Asia/Qatar	3:26:08 -	LMT	1920     # Al Dawhah / Doha
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Asia/Riyadh	3:06:52 -	LMT	1947 Mar 14
 			3:00	-	AST
+Link Asia/Riyadh Asia/Aden	# Yemen
+Link Asia/Riyadh Asia/Kuwait
 
 # Singapore
 # taken from Mok Ly Yng (2003-10-30)
@@ -2767,6 +2760,7 @@ Zone	Asia/Ashgabat	3:53:32 -	LMT	1924 May  2 # or Ashkhabad
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Asia/Dubai	3:41:12 -	LMT	1920
 			4:00	-	GST
+Link Asia/Dubai Asia/Muscat	# Oman
 
 # Uzbekistan
 # Byalokoz 1919 says Uzbekistan was 4:27:53.
@@ -2851,10 +2845,4 @@ Zone Asia/Ho_Chi_Minh	7:06:40 -	LMT	1906 Jul  1
 			7:00	-	ICT
 
 # Yemen
-
-# Milne says 2:59:54 was the meridian of the saluting battery at Aden,
-# and that Yemen was at 1:55:56, the meridian of the Hagia Sophia.
-
-# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
-Zone	Asia/Aden	2:59:54	-	LMT	1950
-			3:00	-	AST
+# See Asia/Riyadh.

data/backward

@@ -5,7 +5,7 @@
 # and their old names.  Many names changed in late 1993.
 
 # Link	TARGET			LINK-NAME
-Link	Africa/Asmara		Africa/Asmera
+Link	Africa/Nairobi		Africa/Asmera
 Link	Africa/Abidjan		Africa/Timbuktu
 Link	America/Argentina/Catamarca	America/Argentina/ComodRivadavia
 Link	America/Adak		America/Atka

data/backzone

@@ -60,6 +60,7 @@ Zone	Africa/Asmara	2:35:32 -	LMT	1870
 			2:35:32	-	AMT	1890        # Asmara Mean Time
 			2:35:20	-	ADMT	1936 May  5 # Adis Dera MT
 			3:00	-	EAT
+Link Africa/Asmara Africa/Asmera
 
 # Mali (southern)
 Zone	Africa/Bamako	-0:32:00 -	LMT	1912
@@ -348,6 +349,17 @@ Zone Antarctica/McMurdo	0	-	zzz	1956
 			12:00	NZ	NZ%sT
 Link Antarctica/McMurdo Antarctica/South_Pole
 
+# Yemen
+# Milne says 2:59:54 was the meridian of the saluting battery at Aden,
+# and that Yemen was at 1:55:56, the meridian of the Hagia Sophia.
+Zone	Asia/Aden	2:59:54	-	LMT	1950
+			3:00	-	AST
+
+# Bahrain
+Zone	Asia/Bahrain	3:22:20 -	LMT	1920     # Manamah
+			4:00	-	GST	1972 Jun
+			3:00	-	AST
+
 # India
 #
 # From Paul Eggert (2014-09-06):
@@ -403,6 +415,16 @@ Zone	Asia/Kashgar	5:03:56	-	LMT	1928     # or Kashi or Kaxgar
 			5:00	-	KAST	1980 May
 			8:00	PRC	C%sT
 
+# Kuwait
+Zone	Asia/Kuwait	3:11:56 -	LMT	1950
+			3:00	-	AST
+
+
+# Oman
+# Milne says 3:54:24 was the meridian of the Muscat Tidal Observatory.
+Zone	Asia/Muscat	3:54:24 -	LMT	1920
+			4:00	-	GST
+
 # India
 # From Paul Eggert (2014-08-11), after a heads-up from Stephen Colebourne:
 # According to a Portuguese decree (1911-05-26)
@@ -494,7 +516,7 @@ Zone	Europe/Guernsey	-0:09:19 -	LMT	1913 Jun 18
 #
 # AT4 of 1883 - The Statutory Time et cetera Act 1883 -
 # LMT Location - 54.1508N -4.4814E - Tynwald Hill ( Manx parliament )
-Zone    Europe/Isle_of_Man -0:17:55 -    LMT 1883 March 30  0:00s
+Zone Europe/Isle_of_Man	-0:17:55 -	LMT	1883 Mar 30  0:00s
 			 0:00	GB-Eire	%s	1968 Oct 27
 			 1:00	-	BST	1971 Oct 31  2:00u
 			 0:00	GB-Eire	%s	1996

data/checklinks.awk

@@ -0,0 +1,19 @@
+# Check links in tz tables.
+
+# Contributed by Paul Eggert.
+
+/^Link/ { used[$2] = 1 }
+/^Zone/ { defined[$2] = 1 }
+
+END {
+    status = 0
+
+    for (tz in used) {
+	if (!defined[tz]) {
+	    printf "%s: Link to non-zone\n", tz
+	    status = 1
+	}
+    }
+
+    exit status
+}

data/checktab.awk

@@ -17,10 +17,6 @@ BEGIN {
 	if (zone_table == "zone1970.tab") {
 	  tztab["America/Antigua"] = 1
 	  tztab["America/Cayman"] = 1
-	  tztab["Asia/Aden"] = 1
-	  tztab["Asia/Bahrain"] = 1
-	  tztab["Asia/Kuwait"] = 1
-	  tztab["Asia/Muscat"] = 1
 	  tztab["Pacific/Midway"] = 1
 	  tztab["Pacific/Saipan"] = 1
 	}

data/europe

@@ -1407,35 +1407,32 @@ Zone	Europe/Budapest	1:16:20 -	LMT	1890 Oct
 # might be a reference to the Julian calendar as opposed to Gregorian, or it
 # might mean something else (???).
 #
-# From Paul Eggert (2006-03-22):
-# The Iceland Almanak, Shanks & Pottenger, and Whitman disagree on many points.
-# We go with the Almanak, except for one claim from Shanks & Pottenger, namely
-# that Reykavik was 21W57 from 1837 to 1908, local mean time before that.
+# From Paul Eggert (2014-11-22):
+# The information below is taken from the 1988 Almanak; see
+# http://www.almanak.hi.is/klukkan.html
 #
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
-Rule	Iceland	1917	1918	-	Feb	19	23:00	1:00	S
+Rule	Iceland	1917	1919	-	Feb	19	23:00	1:00	S
 Rule	Iceland	1917	only	-	Oct	21	 1:00	0	-
-Rule	Iceland	1918	only	-	Nov	16	 1:00	0	-
+Rule	Iceland	1918	1919	-	Nov	16	 1:00	0	-
+Rule	Iceland	1921	only	-	Mar	19	23:00	1:00	S
+Rule	Iceland	1921	only	-	Jun	23	 1:00	0	-
 Rule	Iceland	1939	only	-	Apr	29	23:00	1:00	S
-Rule	Iceland	1939	only	-	Nov	29	 2:00	0	-
+Rule	Iceland	1939	only	-	Oct	29	 2:00	0	-
 Rule	Iceland	1940	only	-	Feb	25	 2:00	1:00	S
-Rule	Iceland	1940	only	-	Nov	 3	 2:00	0	-
-Rule	Iceland	1941	only	-	Mar	 2	 1:00s	1:00	S
-Rule	Iceland	1941	only	-	Nov	 2	 1:00s	0	-
-Rule	Iceland	1942	only	-	Mar	 8	 1:00s	1:00	S
-Rule	Iceland	1942	only	-	Oct	25	 1:00s	0	-
+Rule	Iceland	1940	1941	-	Nov	Sun>=2	 1:00s	0	-
+Rule	Iceland	1941	1942	-	Mar	Sun>=2	 1:00s	1:00	S
 # 1943-1946 - first Sunday in March until first Sunday in winter
 Rule	Iceland	1943	1946	-	Mar	Sun>=1	 1:00s	1:00	S
-Rule	Iceland	1943	1948	-	Oct	Sun>=22	 1:00s	0	-
+Rule	Iceland	1942	1948	-	Oct	Sun>=22	 1:00s	0	-
 # 1947-1967 - first Sunday in April until first Sunday in winter
 Rule	Iceland	1947	1967	-	Apr	Sun>=1	 1:00s	1:00	S
-# 1949 Oct transition delayed by 1 week
+# 1949 and 1967 Oct transitions delayed by 1 week
 Rule	Iceland	1949	only	-	Oct	30	 1:00s	0	-
 Rule	Iceland	1950	1966	-	Oct	Sun>=22	 1:00s	0	-
 Rule	Iceland	1967	only	-	Oct	29	 1:00s	0	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
-Zone Atlantic/Reykjavik	-1:27:24 -	LMT	1837
-			-1:27:48 -	RMT	1908 # Reykjavik Mean Time?
+Zone Atlantic/Reykjavik	-1:28	-	LMT	1908
 			-1:00	Iceland	IS%sT	1968 Apr  7  1:00s
 			 0:00	-	GMT
 

data/leap-seconds.list

@@ -47,7 +47,7 @@
 #	and can be ignored for many purposes. These differences
 #	are tabulated in Circular T, which is published monthly
 #	by the International Bureau of Weights and Measures
-#	(BIPM). See www.bipm.fr for more information.
+#	(BIPM). See www.bipm.org for more information.
 #
 #	3. The current definition of the relationship between UTC
 #	and TAI dates from 1 January 1972. A number of different
@@ -127,22 +127,31 @@
 #	with, since the difficulty of unambiguously representing the epoch
 #	during the leap second does not arise.
 #
+#	Some systems implement leap seconds by amortizing the leap second
+#	over the last few minutes of the day. The frequency of the local
+#	clock is decreased (or increased) to realize the positive (or
+#	negative) leap second. This method removes the time step described
+#	above. Although the long-term behavior of the time scale is correct 
+#	in this case, this method introduces an error during the adjustment 
+#	period both in time and in frequency with respect to the official 
+#	defintion of UTC.
+#
 #	Questions or comments to:
 #		Judah Levine
 #		Time and Frequency Division
 #		NIST
 #		Boulder, Colorado
 #		[email protected]
 #
-#	Last Update of leap second values:   11 January 2012
+#	Last Update of leap second values:   5 January 2015
 #
 #	The following line shows this last update date in NTP timestamp
 #	format. This is the date on which the most recent change to
 #	the leap second data was added to the file. This line can
 #	be identified by the unique pair of characters in the first two
 #	columns as shown below.
 #
-#$	 3535228800
+#$	 3629404800
 #
 #	The NTP timestamps are in units of seconds since the NTP epoch,
 #	which is 1 January 1900, 00:00:00. The Modified Julian Day number
@@ -190,10 +199,10 @@
 #	current -- the update time stamp, the data and the name of the file
 #	will not change.
 #
-#	Updated through IERS Bulletin C48
-#	File expires on:  28 June 2015
+#	Updated through IERS Bulletin C49
+#	File expires on:  28 December 2015
 #
-#@	3644438400
+#@	3660249600
 #
 2272060800	10	# 1 Jan 1972
 2287785600	11	# 1 Jul 1972
@@ -221,6 +230,7 @@
 3345062400	33	# 1 Jan 2006
 3439756800	34	# 1 Jan 2009
 3550089600	35	# 1 Jul 2012
+3644697600	36	# 1 Jul 2015
 #
 #	the following special comment contains the
 #	hash value of the data in this file computed
@@ -236,4 +246,4 @@
 #	the hash line is also ignored in the
 #	computation.
 #
-#h	a4862ccd c6f43c6 964f3604 85944a26 b5cfad4e
+#h	45e70fa7 a9df2033 f4a49ab0 ec648273 7b6c22c

data/leapseconds

@@ -54,3 +54,7 @@ Leap	1998	Dec	31	23:59:60	+	S
 Leap	2005	Dec	31	23:59:60	+	S
 Leap	2008	Dec	31	23:59:60	+	S
 Leap	2012	Jun	30	23:59:60	+	S
+Leap	2015	Jun	30	23:59:60	+	S
+
+#	Updated through IERS Bulletin C49
+#	File expires on:  28 December 2015

data/leapseconds.awk

@@ -37,6 +37,11 @@ BEGIN {
 }
 
 /^ *$/ { next }
+
+/^#\tUpdated through/ || /^#\tFile expires on:/ {
+    last_lines = last_lines $0 "\n"
+}
+
 /^#/ { next }
 
 {
@@ -64,3 +69,7 @@ BEGIN {
     }
     old_TAI_minus_UTC = TAI_minus_UTC
 }
+
+END {
+    printf "\n%s", last_lines
+}