Update to tzdata version 2015b.

http://mm.icann.org/pipermail/tz-announce/2015-March/000029.html

data/NEWS

@@ -1,5 +1,53 @@
 News for the tz database
 
+Release 2015b - 2015-03-19 23:28:11 -0700
+
+  Changes affecting future time stamps
+
+    Mongolia will start observing DST again this year, from the last
+    Saturday in March at 02:00 to the last Saturday in September at 00:00.
+    (Thanks to Ganbold Tsagaankhuu.)
+
+    Palestine will start DST on March 28, not March 27.  Also,
+    correct the fall 2014 transition from September 26 to October 24.
+    Adjust future predictions accordingly.  (Thanks to Steffen Thorsen.)
+
+  Changes affecting past time stamps
+
+    The 1982 zone shift in Pacific/Easter has been corrected, fixing a 2015a
+    regression.  (Thanks to Stuart Bishop for reporting the problem.)
+
+    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: America/Antigua, America/Cayman,
+    Pacific/Midway, and Pacific/Saipan.
+
+  Changes affecting time zone abbreviations
+
+    Correct the 1992-2010 DST abbreviation in Volgograd from "MSK" to "MSD".
+    (Thanks to Hank W.)
+
+  Changes affecting code
+
+    Fix integer overflow bug in reference 'mktime' implementation.
+    (Problem reported by Jörg Richter.)
+
+    Allow -Dtime_tz=time_t compilations, and allow -Dtime_tz=... libraries
+    to be used in the same executable as standard-library time_t functions.
+    (Problems reported by Bradley White.)
+
+  Changes affecting commentary
+
+    Cite the recent Mexican decree changing Quintana Roo's time zone.
+    (Thanks to Carlos Raúl Perasso.)
+
+    Likewise for the recent Chilean decree.  (Thanks to Eduardo Romero Urra.)
+
+    Update info about Mars time.
+
+
 Release 2015a - 2015-01-29 22:35:20 -0800
 
   Changes affecting 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 2015a.
+http://www.iana.org/time-zones, version 2015b.

data/Theory

@@ -717,9 +717,11 @@ Mittelalters und der Neuzeit_, herausgegeben von Dr. O. Grotefend
 
 ----- Time and time zones on Mars -----
 
-Some people have adjusted their work schedules to fit Mars time.
-Dozens of special Mars watches were built for Jet Propulsion
-Laboratory workers who kept Mars time during the Mars Exploration
+Some people's work schedules use Mars time.  Jet Propulsion Laboratory
+(JPL) coordinators have kept Mars time on and off at least since 1997
+for the Mars Pathfinder mission.  Some of their family members have
+also adapted to Mars time.  Dozens of special Mars watches were built
+for JPL workers who kept Mars time during the Mars Exploration
 Rovers mission (2004).  These timepieces look like normal Seikos and
 Citizens but use Mars seconds rather than terrestrial seconds.
 
@@ -760,6 +762,8 @@ Jia-Rui Chong, "Workdays Fit for a Martian", Los Angeles Times
 <http://articles.latimes.com/2004/jan/14/science/sci-marstime14>
 (2004-01-14), pp A1, A20-A21.
 
+Tom Chmielewski, "Jet Lag Is Worse on Mars", The Atlantic (2015-02-26)
+<http://www.theatlantic.com/technology/archive/2015/02/jet-lag-is-worse-on-mars/386033/>
 
 -----
 Local Variables:

data/asia

@@ -1904,6 +1904,13 @@ Zone	Indian/Maldives	4:54:00 -	LMT	1880 # Male
 # was at the start of 2008-03-31 (the day of Steffen Thorsen's report);
 # this is almost surely wrong.
 
+# From Ganbold Tsagaankhuu (2015-03-10):
+# It seems like yesterday Mongolian Government meeting has concluded to use
+# daylight saving time in Mongolia....  Starting at 2:00AM of last Saturday of
+# March 2015, daylight saving time starts.  And 00:00AM of last Saturday of
+# September daylight saving time ends.  Source:
+# http://zasag.mn/news/view/8969
+
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 Rule	Mongol	1983	1984	-	Apr	1	0:00	1:00	S
 Rule	Mongol	1983	only	-	Oct	1	0:00	0	-
@@ -1924,6 +1931,8 @@ Rule	Mongol	1984	1998	-	Sep	lastSun	0:00	0	-
 Rule	Mongol	2001	only	-	Apr	lastSat	2:00	1:00	S
 Rule	Mongol	2001	2006	-	Sep	lastSat	2:00	0	-
 Rule	Mongol	2002	2006	-	Mar	lastSat	2:00	1:00	S
+Rule	Mongol	2015	max	-	Mar	lastSat	2:00	1:00	S
+Rule	Mongol	2015	max	-	Sep	lastSat	0:00	0	-
 
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 # Hovd, a.k.a. Chovd, Dund-Us, Dzhargalant, Khovd, Jirgalanta
@@ -2342,13 +2351,19 @@ Zone	Asia/Karachi	4:28:12 -	LMT	1907
 # official source...:
 # http://www.palestinecabinet.gov.ps/ar/Views/ViewDetails.aspx?pid=1252
 
-# From Paul Eggert (2013-09-24):
-# For future dates, guess the last Thursday in March at 24:00 through
-# the first Friday on or after September 21 at 00:00.  This is consistent with
-# the predictions in today's editions of the following URLs,
-# which are for Gaza and Hebron respectively:
-# http://www.timeanddate.com/worldclock/timezone.html?n=702
-# http://www.timeanddate.com/worldclock/timezone.html?n=2364
+# From Steffen Thorsen (2015-03-03):
+# Sources such as http://www.alquds.com/news/article/view/id/548257
+# and http://www.raya.ps/ar/news/890705.html say Palestine areas will
+# start DST on 2015-03-28 00:00 which is one day later than expected.
+#
+# From Paul Eggert (2015-03-03):
+# http://www.timeanddate.com/time/change/west-bank/ramallah?year=2014
+# says that the fall 2014 transition was Oct 23 at 24:00.
+# For future dates, guess the last Friday in March at 24:00 through
+# the first Friday on or after October 21 at 00:00.  This is consistent with
+# the predictions in today's editions of the following URLs:
+# http://www.timeanddate.com/time/change/gaza-strip/gaza
+# http://www.timeanddate.com/time/change/west-bank/hebron
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 Rule EgyptAsia	1957	only	-	May	10	0:00	1:00	S
@@ -2374,9 +2389,11 @@ Rule Palestine	2011	only	-	Apr	 1	0:01	1:00	S
 Rule Palestine	2011	only	-	Aug	 1	0:00	0	-
 Rule Palestine	2011	only	-	Aug	30	0:00	1:00	S
 Rule Palestine	2011	only	-	Sep	30	0:00	0	-
-Rule Palestine	2012	max	-	Mar	lastThu	24:00	1:00	S
+Rule Palestine	2012	2014	-	Mar	lastThu	24:00	1:00	S
 Rule Palestine	2012	only	-	Sep	21	1:00	0	-
-Rule Palestine	2013	max	-	Sep	Fri>=21	0:00	0	-
+Rule Palestine	2013	only	-	Sep	Fri>=21	0:00	0	-
+Rule Palestine	2014	max	-	Oct	Fri>=21	0:00	0	-
+Rule Palestine	2015	max	-	Mar	lastFri	24:00	1:00	S
 
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Asia/Gaza	2:17:52	-	LMT	1900 Oct

data/australasia

@@ -373,6 +373,7 @@ Zone	Pacific/Guam	-14:21:00 -	LMT	1844 Dec 31
 			 9:39:00 -	LMT	1901        # Agana
 			10:00	-	GST	2000 Dec 23 # Guam
 			10:00	-	ChST	# Chamorro Standard Time
+Link Pacific/Guam Pacific/Saipan # N Mariana Is
 
 # Kiribati
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
@@ -388,12 +389,7 @@ Zone Pacific/Kiritimati	-10:29:20 -	LMT	1901
 			 14:00	-	LINT
 
 # N Mariana Is
-# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
-Zone Pacific/Saipan	-14:17:00 -	LMT	1844 Dec 31
-			 9:43:00 -	LMT	1901
-			 9:00	-	MPT	1969 Oct    # N Mariana Is Time
-			10:00	-	MPT	2000 Dec 23
-			10:00	-	ChST	# Chamorro Standard Time
+# See Pacific/Guam.
 
 # Marshall Is
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
@@ -563,6 +559,7 @@ Zone Pacific/Pago_Pago	 12:37:12 -	LMT	1879 Jul  5
 			-11:00	-	NST	1967 Apr    # N=Nome
 			-11:00	-	BST	1983 Nov 30 # B=Bering
 			-11:00	-	SST	            # S=Samoa
+Link Pacific/Pago_Pago Pacific/Midway # in US minor outlying islands
 
 # Samoa (formerly and also known as Western Samoa)
 
@@ -744,23 +741,7 @@ Zone Pacific/Funafuti	11:56:52 -	LMT	1901
 # uninhabited
 
 # Midway
-#
-# From Mark Brader (2005-01-23):
-# [Fallacies and Fantasies of Air Transport History, by R.E.G. Davies,
-# published 1994 by Paladwr Press, McLean, VA, USA; ISBN 0-9626483-5-3]
-# reproduced a Pan American Airways timetable from 1936, for their weekly
-# "Orient Express" flights between San Francisco and Manila, and connecting
-# flights to Chicago and the US East Coast.  As it uses some time zone
-# designations that I've never seen before:....
-# Fri. 6:30A Lv. HONOLOLU (Pearl Harbor), H.I.   H.L.T. Ar. 5:30P Sun.
-#  "   3:00P Ar. MIDWAY ISLAND . . . . . . . . . M.L.T. Lv. 6:00A  "
-#
-Zone Pacific/Midway	-11:49:28 -	LMT	1901
-			-11:00	-	NST	1956 Jun  3
-			-11:00	1:00	NDT	1956 Sep  2
-			-11:00	-	NST	1967 Apr    # N=Nome
-			-11:00	-	BST	1983 Nov 30 # B=Bering
-			-11:00	-	SST	            # S=Samoa
+# See Pacific/Pago_Pago.
 
 # Palmyra
 # uninhabited since World War II; was probably like Pacific/Kiritimati

data/backzone

@@ -255,6 +255,11 @@ Zone	Africa/Timbuktu	-0:12:04 -	LMT	1912
 Zone America/Anguilla	-4:12:16 -	LMT	1912 Mar  2
 			-4:00	-	AST
 
+# Antigua and Barbuda
+Zone	America/Antigua	-4:07:12 -	LMT	1912 Mar 2
+			-5:00	-	EST	1951
+			-4:00	-	AST
+
 # Chubut, Argentina
 # The name "Comodoro Rivadavia" exceeds the 14-byte POSIX limit.
 Zone America/Argentina/ComodRivadavia -4:30:00 - LMT	1894 Oct 31
@@ -274,6 +279,11 @@ Zone	America/Aruba	-4:40:24 -	LMT	1912 Feb 12 # Oranjestad
 			-4:30	-	ANT	1965 # Netherlands Antilles Time
 			-4:00	-	AST
 
+# Cayman Is
+Zone	America/Cayman	-5:25:32 -	LMT	1890     # Georgetown
+			-5:07:11 -	KMT	1912 Feb # Kingston Mean Time
+			-5:00	-	EST
+
 # Canada
 Zone America/Coral_Harbour -5:32:40 -	LMT	1884
 			-5:00	NT_YK	E%sT	1946
@@ -599,3 +609,29 @@ Zone	Indian/Mayotte	3:00:56 -	LMT	1911 Jul # Mamoutzou
 
 # US minor outlying islands
 Zone Pacific/Johnston	-10:00	-	HST
+
+# US minor outlying islands
+#
+# From Mark Brader (2005-01-23):
+# [Fallacies and Fantasies of Air Transport History, by R.E.G. Davies,
+# published 1994 by Paladwr Press, McLean, VA, USA; ISBN 0-9626483-5-3]
+# reproduced a Pan American Airways timetable from 1936, for their weekly
+# "Orient Express" flights between San Francisco and Manila, and connecting
+# flights to Chicago and the US East Coast.  As it uses some time zone
+# designations that I've never seen before:....
+# Fri. 6:30A Lv. HONOLOLU (Pearl Harbor), H.I.   H.L.T. Ar. 5:30P Sun.
+#  "   3:00P Ar. MIDWAY ISLAND . . . . . . . . . M.L.T. Lv. 6:00A  "
+#
+Zone Pacific/Midway	-11:49:28 -	LMT	1901
+			-11:00	-	NST	1956 Jun  3
+			-11:00	1:00	NDT	1956 Sep  2
+			-11:00	-	NST	1967 Apr    # N=Nome
+			-11:00	-	BST	1983 Nov 30 # B=Bering
+			-11:00	-	SST	            # S=Samoa
+
+# N Mariana Is
+Zone Pacific/Saipan	-14:17:00 -	LMT	1844 Dec 31
+			 9:43:00 -	LMT	1901
+			 9:00	-	MPT	1969 Oct    # N Mariana Is Time
+			10:00	-	MPT	2000 Dec 23
+			10:00	-	ChST	# Chamorro Standard Time

data/checktab.awk

@@ -12,15 +12,6 @@ BEGIN {
 	# A special (and we hope temporary) case.
 	tztab["America/Montreal"] = 1
 
-	# Some more special cases; these are zones that should probably
-	# be turned into links.
-	if (zone_table == "zone1970.tab") {
-	  tztab["America/Antigua"] = 1
-	  tztab["America/Cayman"] = 1
-	  tztab["Pacific/Midway"] = 1
-	  tztab["Pacific/Saipan"] = 1
-	}
-
 	while (getline <iso_table) {
 		iso_NR++
 		if ($0 ~ /^#/) continue

data/europe

@@ -2400,7 +2400,7 @@ Zone Europe/Volgograd	 2:57:40 -	LMT	1920 Jan  3
 			 4:00	Russia	VOL%sT	1989 Mar 26  2:00s # Volgograd T
 			 3:00	Russia	VOL%sT	1991 Mar 31  2:00s
 			 4:00	-	VOLT	1992 Mar 29  2:00s
-			 3:00	Russia	MSK	2011 Mar 27  2:00s
+			 3:00	Russia	MSK/MSD	2011 Mar 27  2:00s
 			 4:00	-	MSK	2014 Oct 26  2:00s
 			 3:00	-	MSK
 

data/leap-seconds.list

@@ -131,10 +131,10 @@
 #	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.
+#	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
+#	definition of UTC.
 #
 #	Questions or comments to:
 #		Judah Levine

data/northamerica

@@ -2312,8 +2312,24 @@ Zone America/Dawson	-9:17:40 -	LMT	1900 Aug 20
 # "...the new time zone will come into effect at two o'clock on the first Sunday
 # of February, when we will have to advance the clock one hour from its current
 # time..."
-#
 # Also, the new zone will not use DST.
+#
+# From Carlos Raúl Perasso (2015-02-02):
+# The decree that modifies the Mexican Hour System Law has finally
+# been published at the Diario Oficial de la Federación
+# http://www.dof.gob.mx/nota_detalle.php?codigo=5380123&fecha=31/01/2015
+# It establishes 5 zones for Mexico:
+# 1- Zona Centro (Central Zone): Corresponds to longitude 90 W,
+#    includes most of Mexico, excluding what's mentioned below.
+# 2- Zona Pacífico (Pacific Zone): Longitude 105 W, includes the
+#    states of Baja California Sur; Chihuahua; Nayarit (excluding Bahía
+#    de Banderas which lies in Central Zone); Sinaloa and Sonora.
+# 3- Zona Noroeste (Northwest Zone): Longitude 120 W, includes the
+#    state of Baja California.
+# 4- Zona Sureste (Southeast Zone): Longitude 75 W, includes the state
+#    of Quintana Roo.
+# 5- The islands, reefs and keys shall take their timezone from the
+#    longitude they are located at.
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 Rule	Mexico	1939	only	-	Feb	5	0:00	1:00	D
@@ -2508,13 +2524,8 @@ Zone America/Santa_Isabel	-7:39:28 -	LMT	1922 Jan  1  0:20:32
 ###############################################################################
 
 # Anguilla
-# See America/Port_of_Spain.
-
 # Antigua and Barbuda
-# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
-Zone	America/Antigua	-4:07:12 -	LMT	1912 Mar 2
-			-5:00	-	EST	1951
-			-4:00	-	AST
+# See America/Port_of_Spain.
 
 # Bahamas
 #
@@ -2581,10 +2592,7 @@ Zone Atlantic/Bermuda	-4:19:18 -	LMT	1930 Jan  1  2:00 # Hamilton
 			-4:00	US	A%sT
 
 # Cayman Is
-# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
-Zone	America/Cayman	-5:25:32 -	LMT	1890     # Georgetown
-			-5:07:11 -	KMT	1912 Feb # Kingston Mean Time
-			-5:00	-	EST
+# See America/Panama.
 
 # Costa Rica
 
@@ -3107,6 +3115,7 @@ Zone	America/Managua	-5:45:08 -	LMT	1890
 Zone	America/Panama	-5:18:08 -	LMT	1890
 			-5:19:36 -	CMT	1908 Apr 22 # Colón Mean Time
 			-5:00	-	EST
+Link America/Panama America/Cayman
 
 # Puerto Rico
 # There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'.

data/southamerica

@@ -1206,10 +1206,13 @@ Zone America/Rio_Branco	-4:31:12 -	LMT	1914
 # DST Start: first Saturday of September 2014 (Sun 07 Sep 2014 04:00 UTC)
 # http://www.diariooficial.interior.gob.cl//media/2014/02/19/do-20140219.pdf
 
-# From Juan Correa (2015-01-28):
-# ... today the Ministry of Energy announced that Chile will drop DST, will keep
-# "summer time" (UTC -3 / UTC -5) all year round....
-# http://www.minenergia.cl/ministerio/noticias/generales/ministerio-de-energia-anuncia.html
+# From Eduardo Romero Urra (2015-03-03):
+# Today has been published officially that Chile will use the DST time
+# permanently until March 25 of 2017
+# http://www.diariooficial.interior.gob.cl/media/2015/03/03/1-large.jpg
+#
+# From Paul Eggert (2015-03-03):
+# For now, assume that the extension will persist indefinitely.
 
 # NOTE: ChileAQ rules for Antarctic bases are stored separately in the
 # 'antarctica' file.
@@ -1268,7 +1271,7 @@ Zone America/Santiago	-4:42:46 -	LMT	1890
 			-3:00	-	CLT
 Zone Pacific/Easter	-7:17:44 -	LMT	1890
 			-7:17:28 -	EMT	1932 Sep    # Easter Mean Time
-			-7:00	Chile	EAS%sT	1982 Mar 13 3:00u # Easter Time
+			-7:00	Chile	EAS%sT	1982 Mar 14 3:00u # Easter Time
 			-6:00	Chile	EAS%sT	2015 Apr 26 3:00u
 			-5:00	-	EAST
 #
@@ -1603,6 +1606,7 @@ Zone America/Port_of_Spain -4:06:04 -	LMT	1912 Mar 2
 
 # These all agree with Trinidad and Tobago since 1970.
 Link America/Port_of_Spain America/Anguilla
+Link America/Port_of_Spain America/Antigua
 Link America/Port_of_Spain America/Dominica
 Link America/Port_of_Spain America/Grenada
 Link America/Port_of_Spain America/Guadeloupe