Update to tzdata2000f

7 files changed, 182 insertions, 114 deletions

diff --git a/share/zoneinfo/datfiles/asia b/share/zoneinfo/datfiles/asia
index 6d9f5172fe6..7ef2d0c63e5 100644
--- a/share/zoneinfo/datfiles/asia
+++ b/share/zoneinfo/datfiles/asia
@@ -1,4 +1,4 @@
-# @(#)asia	7.55
+# @(#)asia	7.56
 
 # This data is by no means authoritative; if you think you know better,
 # go ahead and edit the file (and please send any changes to
@@ -370,9 +370,9 @@ Zone Asia/Jayapura	9:22:48 -	LMT	1932 Nov
 			9:00	-	JAYT
 
 # Iran
-# From Paul Eggert (1999-09-27), following up a suggestion by Rich Wales:
+# From Paul Eggert (2000-06-12), following up a suggestion by Rich Wales:
 # Ahmea Alavi in
-# <a href="http://tehran.stanford.edu/Iran_Lib/Calendar/taghveem.txt">
+# <a href="http://www.persia.org/Iran_Lib/Calendar/taghveem.txt">
 # TAGHVEEM (1993-07-12)
 # </a>
 # writes ``Daylight saving time in Iran starts from the first day
@@ -385,12 +385,13 @@ Zone Asia/Jayapura	9:22:48 -	LMT	1932 Nov
 #	1993	03-21	03-21	09-23	09-23
 #	1994	03-21	03-21	09-22!= 09-23
 #	1995	03-21	03-21	09-22!= 09-23
-#	1996	03-21!=	03-20	09-21!= 09-22
-#	1997	03-21	03-21	09-21!= 09-23
+#	1996	03-21!=	03-20	09-22   09-22
+#	1997	03-22!=	03-21	09-22!= 09-23
 #	1998	03-21	03-21	09-21!= 09-23
 #	1999	03-22!=	03-21	09-22!= 09-23
 #	2000	03-21!=	03-20	09-21!= 09-22
-#	2001	03-17!=	03-21	09-19!= 09-23
+#	2001	03-19!=	03-21	09-19!= 09-23
+#	2002	03-18!=	03-21	09-18!= 09-23
 #
 # Go with Alavi starting with 1992.
 # I used Ed Reingold's cal-persia in GNU Emacs 19.34 to compute Persian dates.
@@ -455,7 +456,23 @@ Zone	Asia/Tehran	3:25:44	-	LMT	1916
 			4:00	Iran	IR%sT	1979
 			3:30	Iran	IR%sT
 
+
 # Iraq
+#
+# From Jonathan Lennox <lennox@cs.columbia.edu> (2000-06-12):
+# An article in this week's Economist ("Inside the Saddam-free zone", p. 50 in
+# the U.S. edition) on the Iraqi Kurds contains a paragraph: 
+# "The three northern provinces ... switched their clocks this spring and
+# are an hour ahead of Baghdad."
+#
+# But Rives McDow (2000-06-18) quotes a contact in Iraqi-Kurdistan as follows:
+# In the past, some Kurdish nationalists, as a protest to the Iraqi
+# Government, did not adhere to daylight saving time.  They referred
+# to daylight saving as Saddam time.  But, as of today, the time zone
+# in Iraqi-Kurdistan is on standard time with Baghdad, Iraq.
+#
+# So we'll ignore the Economist's claim.
+
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 Rule	Iraq	1982	only	-	May	1	0:00	1:00	D
 Rule	Iraq	1982	1984	-	Oct	1	0:00	0	S
@@ -526,7 +543,7 @@ Rule	Zion	1988	only	-	Apr	 9	0:00	1:00	D
 Rule	Zion	1988	only	-	Sep	 3	0:00	0	S
 
 # From Ephraim Silverberg <ephraim@cs.huji.ac.il>
-# (1997-03-04, 1998-03-16, 1998-12-28, and 2000-01-17):
+# (1997-03-04, 1998-03-16, 1998-12-28, 2000-01-17 and 2000-07-25):
 
 # According to the Office of the Secretary General of the Ministry of
 # Interior, there is NO set rule for Daylight-Savings/Standard time changes.
@@ -537,14 +554,19 @@ Rule	Zion	1988	only	-	Sep	 3	0:00	0	S
 # Saturday night from midnight daylight savings time to 11 p.m. standard
 # time.  1996 is an exception to this rule where the change back to standard
 # time took place on Sunday night instead of Saturday night to avoid
-# conflicts with the Jewish New Year.  Starting in 1999, the change to
-# daylight savings time will still be on a Friday morning but from
+# conflicts with the Jewish New Year.  In 1999, the change to
+# daylight savings time was still on a Friday morning but from
 # 2 a.m. IST to 3 a.m. IDT; furthermore, the change back to standard time
-# will now also be on a Friday morning from 2 a.m. IDT to 1 a.m. IST for
-# 1999 only.  In the years from 2000 to 2002, the change back will be from
-# 2 a.m. IDT to 1 a.m. IST the morning after the Jewish festival of
-# Shmini Atzeret (i.e. the morning of the 23rd of Tishrei in the lunar
-# Hebrew calendar).
+# was also on a Friday morning from 2 a.m. IDT to 1 a.m. IST for
+# 1999 only.  In the year 2000, the change to daylight savings time was
+# similar to 1999, but although the change back will be on a Friday, it
+# will take place from 1 a.m. IDT to midnight IST.  Starting in 2001, all
+# changes to/from will take place at 1 a.m. old time, but now there is no
+# rule as to what day of the week it will take place in as the start date
+# (except in 2003) is the night after the Passover Seder (i.e. the eve
+# of the 16th of Nisan in the lunar Hebrew calendar) and the end date
+# (except in 2002) is three nights before Yom Kippur [Day of Atonement]
+# (the eve of the 7th of Tishrei in the lunar Hebrew calendar).
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 Rule	Zion	1989	only	-	Apr	30	0:00	1:00	D
@@ -592,29 +614,37 @@ Rule	Zion	1998	only	-	Sep	 6	0:00	0	S
 Rule	Zion	1999	only	-	Apr	 2	2:00	1:00	D
 Rule	Zion	1999	only	-	Sep	 3	2:00	0	S
 
-# Minister of Interior, Natan Sharansky, has announced the dates for
-# the years 2000-2002.  However, sources inside the ministry have noted
-# that the end date of 2000 and both dates of 2001-2002 should be regarded
-# as tentative pending final approval.
+# The Knesset Interior Committee has changed the dates for 2000 for
+# the third time in just over a year and have set new dates for the
+# years 2001-2004 as well.
+#
+# The official announcement for the start date of 2000 can be viewed at:
+#
+#	ftp://ftp.huji.ac.il/pub/tz/announcements/2000-start.ps.gz
 #
-# The official announcement for the years 2000-2002 can be viewed at:
+# The official announcement for the end date of 2000 and the dates
+# for the years 2001-2004 can be viewed at:
 #
-#	ftp://ftp.huji.ac.il/pub/tz/announcements/2000-2002.ps.gz
+#	ftp://ftp.huji.ac.il/pub/tz/announcements/2000-2004.ps.gz
 
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 Rule	Zion	2000	only	-	Apr	14	2:00	1:00	D
-Rule	Zion	2000	only	-	Oct	22	2:00	0	S
-Rule	Zion	2001	only	-	Apr	 6	2:00	1:00	D
-Rule	Zion	2001	only	-	Oct	10	2:00	0	S
-Rule	Zion	2002	only	-	Mar	29	2:00	1:00	D
-Rule	Zion	2002	only	-	Sep	29	2:00	0	S
-
-# From Paul Eggert (2000-01-17):
-# Here are guesses for rules after 2002.
+Rule	Zion	2000	only	-	Oct	 6	1:00	0	S
+Rule	Zion	2001	only	-	Apr	 9	1:00	1:00	D
+Rule	Zion	2001	only	-	Sep	24	1:00	0	S
+Rule	Zion	2002	only	-	Mar	29	1:00	1:00	D
+Rule	Zion	2002	only	-	Oct	 7	1:00	0	S
+Rule	Zion	2003	only	-	Mar	28	1:00	1:00	D
+Rule	Zion	2003	only	-	Oct	 3	1:00	0	S
+Rule	Zion	2004	only	-	Apr	 7	1:00	1:00	D
+Rule	Zion	2004	only	-	Sep	22	1:00	0	S
+
+# From Paul Eggert (2000-07-25):
+# Here are guesses for rules after 2004.
 # They are probably wrong, but they are more likely than no DST at all.
 # Rule  NAME    FROM    TO      TYPE    IN      ON      AT      SAVE    LETTER/S
-Rule	Zion	2003	max	-	Mar	Fri>=25	2:00	1:00	D
-Rule	Zion	2003	max	-	Oct	 1	2:00	0	S
+Rule	Zion	2005	max	-	Apr	 1	1:00	1:00	D
+Rule	Zion	2005	max	-	Oct	 1	1:00	0	S
 
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Asia/Jerusalem	2:20:56 -	LMT	1880
diff --git a/share/zoneinfo/datfiles/australasia b/share/zoneinfo/datfiles/australasia
index 32699605f24..c9215d82ec9 100644
--- a/share/zoneinfo/datfiles/australasia
+++ b/share/zoneinfo/datfiles/australasia
@@ -1,4 +1,4 @@
-# @(#)australasia	7.56
+# @(#)australasia	7.58
 # This file also includes Pacific islands.
 
 # Notes are at the end of this file
@@ -70,8 +70,11 @@ Rule	AS	1987	max	-	Oct	lastSun	2:00s	1:00	-
 Rule	AS	1972	only	-	Feb	27	2:00s	0	-
 Rule	AS	1973	1985	-	Mar	Sun>=1	2:00s	0	-
 Rule	AS	1986	1989	-	Mar	Sun>=15	2:00s	0	-
-Rule	AS	1990	1994	even	Mar	Sun>=18	2:00s	0	-
-Rule	AS	1990	1994	odd	Mar	Sun>=1	2:00s	0	-
+Rule	AS	1990	only	-	Mar	Sun>=18	2:00s	0	-
+Rule	AS	1991	only	-	Mar	Sun>=1	2:00s	0	-
+Rule	AS	1992	only	-	Mar	Sun>=18	2:00s	0	-
+Rule	AS	1993	only	-	Mar	Sun>=1	2:00s	0	-
+Rule	AS	1994	only	-	Mar	Sun>=18	2:00s	0	-
 Rule	AS	1995	max	-	Mar	lastSun	2:00s	0	-
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone Australia/Adelaide	9:14:20 -	LMT	1895 Feb
@@ -737,6 +740,9 @@ Zone	Pacific/Wallis	12:15:20 -	LMT	1901
 # (Australia) and start daylight saving on the last Sunday in August in 2000
 # instead of the first Sunday in October.
 
+# Sim Alam (2000-07-03) reported a legal citation for the 2000/2001 rules:
+# http://www.thelaw.tas.gov.au/fragview/42++1968+GS3A@EN+2000070300
+
 # Victoria
 
 # The rules for 1971 through 1991 were reported by George Shepherd
diff --git a/share/zoneinfo/datfiles/europe b/share/zoneinfo/datfiles/europe
index cc08c0c2366..92b82b622c2 100644
--- a/share/zoneinfo/datfiles/europe
+++ b/share/zoneinfo/datfiles/europe
@@ -1,4 +1,4 @@
-# @(#)europe	7.71
+# @(#)europe	7.73
 
 # This data is by no means authoritative; if you think you know better,
 # go ahead and edit the file (and please send any changes to
@@ -131,6 +131,10 @@
 # A bill was drafted in 1909 and introduced in Parliament several times,
 # but it met with ridicule and opposition, especially from farming interests.
 # One-hour Summer Time was eventually adopted as a wartime measure in 1916.
+# See:
+# <a href="http://www.the-times.co.uk/news/pages/tim/2000/05/18/x-timcrtcrt01011.html">
+# Summer Time Arrives Early, The Times (2000-05-18)
+# </a>
 
 # From Paul Eggert (1996-09-03):
 # The OED Supplement says that the English originally said ``Daylight Saving''
@@ -1185,6 +1189,10 @@ Zone	Europe/Vaduz	0:38:04 -	LMT	1894 Jun
 # motion to give up shifting to summer time in spring, as it was
 # already done by Estonia. 
 
+# From the <a href="http://www.tourism.lt/informa/ff.htm">
+# Fact File, Lithuanian State Department of Tourism
+# </a> (2000-03-27): Local time is GMT+2 hours ..., no daylight saving.
+
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Europe/Vilnius	1:41:16	-	LMT	1880
 			1:24:00	-	WMT	1917	    # Warsaw Mean Time
@@ -1199,7 +1207,7 @@ Zone	Europe/Vilnius	1:41:16	-	LMT	1880
 			2:00	C-Eur	EE%sT	1998
 			2:00	-	EET	1998 Mar 29 1:00u
 			1:00	EU	CE%sT	1999 Oct 31 1:00u
-			2:00	EU	EE%sT
+			2:00	-	EET
 
 # Luxembourg
 # Whitman disagrees with most of these dates in minor ways; go with Shanks.
@@ -1856,7 +1864,8 @@ Zone Europe/Simferopol	2:16:24 -	LMT	1880
 			3:00	1:00	MSD	1996 Oct 27 3:00s
 # IATA SSIM (1997-09) says Crimea switched to EET/EEST.
 # Assume it happened in March by not changing the clocks.
-			3:00	Russia	MSK/MSD	1997 Mar lastSun 1:00u
+			3:00	Russia	MSK/MSD	1997
+			3:00	-	MSK	1997 Mar lastSun 1:00u
 			2:00	EU	EE%sT
 
 # Yugoslavia
diff --git a/share/zoneinfo/datfiles/northamerica b/share/zoneinfo/datfiles/northamerica
index 845587fa820..654450a9c57 100644
--- a/share/zoneinfo/datfiles/northamerica
+++ b/share/zoneinfo/datfiles/northamerica
@@ -1,4 +1,4 @@
-# @(#)northamerica	7.51
+# @(#)northamerica	7.52
 # also includes Central America and the Caribbean
 
 # This data is by no means authoritative; if you think you know better,
@@ -1002,52 +1002,35 @@ Zone America/Dawson	-9:17:40 -	LMT	1900 Aug 20
 
 # Mexico
 
-# From Guy Harris:
-# Rules are from the Official Airline Guide, Worldwide Edition, for 1987.
-# Rules [before] 1987 are unknown.
-# The comments in the OAG say "Only Ensenada, Mexicale, San Felipe and Tijuana
-# observe DST."  This is presumably Baja California Norte, above 28th parallel,
-# as listed there; [there is also] "Baja California Sur and N. Pacific
-# Coast (States of Sinaloa and Sonora)."
-
-# From Bob Devine (1988-01-28):
-# The Federal District (where Mexico City is) has observed [DST] several
-# times but not recently.
+# Gwillim Law reports this source for daylight saving time in Mexico:
+# <a href="http://www.spin.com.mx/verano/">
+# Daylight saving time * SPIN-Internet (in Spanish)
+# </a>
+# Law (2000-03-09) translates it as follows:
 #
-# I don't where to draw the line in the North Baja area.  28th latitude
-# sounds good -- but it may be higher (how far [d]o radio stations from
-# San Diego affect culture?).
+# Standard time effective in Mexico takes its origin in the
+# presidential decree of April 24, 1942.  The time of the 120th
+# meridian applies to the state of Baja California; of the 105th
+# meridian to the states of Baja California Sur, Sonora, Sinaloa, and
+# Nayarit; and the time of the 90th meridian to the rest of the
+# country.
 #
-# The dates of DST probably go back to 1981.  The rules are the same as
-# US's.  This is going to be a headache for US presidential electi[o]n years!
-
-# From Arthur David Olson (1988-02-13)
-# Since the 1981 starting date is only "probable," we'll keep the 1987
-# starting date below.
-
-# From U. S. Naval Observatory (1989-01-19):
-# MEXICO BAJA CAL N   7 H  BEHIND UTC    BAJA CALIFORNIA SUR AND
-# MEXICO BAJA CAL N                      N. PACIFIC COAST (STATES
-# MEXICO BAJA CAL N                      OF SINALOA AND SONORA)
-# MEXICO BAJA CAL N   8 H  BEHIND UTC    ABOVE 28TH PARALLEL APR 3
-# MEXICO BAJA CAL N                      - OCT 29
-# MEXICO BAJA CAL N   7 H  BEHIND UTC    ABOVE 28TH PARALLEL APR 3
-# MEXICO BAJA CAL N                      - 0CT 29
-# MEXICO              6 H  BEHIND UTC    STATES OF DURANGO,
-# MEXICO                                 COAHUILA, NUEVO LEON,
-# MEXICO                                 TAMAULIPAS
-# MEXICO              5 H  BEHIND UTC    STATES OF DURANGO,
-# MEXICO                                 COAHUILA, NUEVO LEON,
-# MEXICO                                 TAMAULIPAS  APR 3 - OCT 29
-# MEXICO              6 H  BEHIND UTC    GENERAL MEXICO, STATES OF
-# MEXICO                                 CAMPECHE, QUINTANA ROO AND
-# MEXICO                                 YUCATAN
+# In the country, there have been several attempts made to adapt
+# standard time with the object of arriving at a better use of
+# daylight for social and economic activities.  In December, 1981 a
+# permanent time zone was decreed for the states of Campeche, Yucatan,
+# and Quintana Roo, displacing them from the 90th to the 75th
+# meridian.  This disposition was annulled on December 2, 1982.
+#
+# In 1988 a Summer Time was established for the states of Tamaulipas,
+# Nuevo Leon, Coahuila, and Durango, which meant that from the first
+# Sunday in April to the last [Sunday] of October those states
+# displaced their time from the 90th to the 75th meridian.  That
+# disposition lasted for one year.
 
-# From Arthur David Olson (1989-01-21):
-# April 3 fell on a Sunday in 1988; October 29 fell on a Sunday in 1989.  Ahem.
-# USNO claims there should be four Mexican zones rather than three:
-# a zone that's GMT-8 with DST; a zone that's always GMT-7;
-# a zone that's GMT-6 with DST; and a zone that's always GMT-6.
+# From Paul Eggert (2000-07-26):
+# Shanks gives 1942-04-01 instead of 1942-04-24, and omits the 1981
+# and 1988 DST experiments.  Go with spin.com.mx.
 
 # From Alan Perry <alan.perry@eng.sun.com> (1996-02-15):
 # A guy from our Mexico subsidiary finally found the Presidential Decree
@@ -1093,7 +1076,6 @@ Zone America/Dawson	-9:17:40 -	LMT	1900 Aug 20
 # savings time so as to stay on the same time zone as the southern part of
 # Arizona year round.
 
-# From Shanks:
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 Rule	Mexico	1939	only	-	Feb	5	0:00	1:00	D
 Rule	Mexico	1939	only	-	Jun	25	0:00	0	S
@@ -1111,10 +1093,22 @@ Rule	BajaN	1954	1961	-	Sep	lastSun	2:00	0	S
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 # Quintana Roo
 Zone America/Cancun	-5:47:04 -	LMT	1922 Jan  1  0:12:56
+			-6:00	-	CST	1981 Dec
+			-5:00	-	EST	1982 Dec  2
 			-6:00	-	CST	1996
 			-6:00	Mexico	C%sT	1997 Oct lastSun 2:00
 			-5:00	Mexico	E%sT	1998 Aug  2  2:00
 			-6:00	Mexico	C%sT
+# Campeche, Yucatan
+Zone America/Merida	-5:58:28 -	LMT	1922 Jan  1  0:01:32
+			-6:00	-	CST	1981 Dec
+			-5:00	-	EST	1982 Dec  2
+			-6:00	Mexico	C%sT
+# Coahuila, Durango, Nuevo Leon, Tamaulipas
+Zone America/Monterrey	-6:41:16 -	LMT	1922 Jan  1  0:01:32
+			-6:00	-	CST	1988
+			-6:00	US	C%sT	1989
+			-6:00	Mexico	C%sT
 # Central Mexico
 Zone America/Mexico_City -6:36:36 -	LMT	1922 Jan  1  0:23:24
 			-7:00	-	MST	1927 Jun 10 23:00
@@ -1141,19 +1135,19 @@ Zone America/Hermosillo	-7:23:52 -	LMT	1921 Dec 31 23:36:08
 			-7:00	-	MST	1931 May  1 23:00
 			-6:00	-	CST	1931 Oct
 			-7:00	-	MST	1932 Mar 30 23:00
-			-6:00	-	CST	1942 Apr
+			-6:00	-	CST	1942 Apr 24
 			-7:00	-	MST	1949 Jan 14
 			-8:00	-	PST	1970
 			-7:00	Mexico	M%sT	1999
 			-7:00	-	MST
-# S Baja California, Nayarit, Sinaloa
+# Baja California Sur, Nayarit, Sinaloa
 Zone America/Mazatlan	-7:05:40 -	LMT	1921 Dec 31 23:54:20
 			-7:00	-	MST	1927 Jun 10 23:00
 			-6:00	-	CST	1930 Nov 15
 			-7:00	-	MST	1931 May  1 23:00
 			-6:00	-	CST	1931 Oct
 			-7:00	-	MST	1932 Mar 30 23:00
-			-6:00	-	CST	1942 Apr
+			-6:00	-	CST	1942 Apr 24
 			-7:00	-	MST	1949 Jan 14
 			-8:00	-	PST	1970
 			-7:00	Mexico	M%sT
@@ -1161,7 +1155,7 @@ Zone America/Mazatlan	-7:05:40 -	LMT	1921 Dec 31 23:54:20
 Zone America/Tijuana	-7:48:04 -	LMT	1922 Jan  1  0:11:56
 			-8:00	-	PST	1927 Jun 10 23:00
 			-7:00	-	MST	1930 Nov 16
-			-8:00	-	PST	1942 Apr
+			-8:00	-	PST	1942 Apr 24
 			-7:00	-	MST	1949 Jan 14
 			-8:00	BajaN	P%sT	1976
 			-8:00	US	P%sT	1996
diff --git a/share/zoneinfo/datfiles/southamerica b/share/zoneinfo/datfiles/southamerica
index 81797ff2a53..39d5d6b782d 100644
--- a/share/zoneinfo/datfiles/southamerica
+++ b/share/zoneinfo/datfiles/southamerica
@@ -1,4 +1,4 @@
-# @(#)southamerica	7.35
+# @(#)southamerica	7.36
 
 # This data is by no means authoritative; if you think you know better,
 # go ahead and edit the file (and please send any changes to
@@ -111,24 +111,31 @@ Rule	Arg	1989	1992	-	Oct	Sun>=15	0:00	1:00	S
 # From Rives McDow (2000-01-10):
 # On October 3, 1999, 0:00 local, Argentina implemented daylight savings time,
 # which did not result in the switch of a time zone, as they stayed 9 hours
-# from the International Date Line.  On March 5, 2000, at 0:00 local time,
-# Argentina will come off daylight savings time, which will bring them to 8
-# hours from the International Date Line.
+# from the International Date Line.
+Rule	Arg	1999	only	-	Oct	Sun>=1	0:00	1:00	S
+Rule	Arg	2000	only	-	Mar	Sun>=1	0:00	0	-
 #
 # From Peter Gradelski via Steffen Thorsen (2000-03-01):
 # We just checked with our San Paulo office and they say the government of
 # Argentina decided not to become one of the countries that go on or off DST.
 # So Buenos Aires should be -3 hours from GMT at all times.
 #
+# From Fabian L. Arce Jofre <farcejofre@bigfoot.com> (2000-04-04):
+# The law that claimed DST for Argentina was derogated by President Fernando
+# de la Rua on March 2, 2000, because it would make people spend more energy
+# in the winter time, rather than less.  The change took effect on March 3.
+#
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 #
-# Buenos Aires (BA), Distrito Federal (DF), Santa Cruz (SC),
-# Tierra del Fuego (TF) & Antartida e Islas
+# Buenos Aires (BA), Capital Federal (CF), Santa Cruz (SC),
+# Tierra del Fuego, Antartida e Islas del Atlantico Sur (TF)
 Zone America/Buenos_Aires -3:53:48 -	LMT	1894 Nov
 			-4:16:44 -	CMT	1920 May    # Cordoba Mean Time
 			-4:00	-	ART	1930 Dec
 			-4:00	Arg	AR%sT	1969 Oct  5
-			-3:00	Arg	AR%sT
+			-3:00	Arg	AR%sT	1999 Oct  3 0:00
+			-4:00	Arg	AR%sT	2000 Mar  3 0:00
+			-3:00	-	ART
 #
 # Santa Fe (SF), Entre Rios (ER), Corrientes (CN), Misiones (MN), Chaco (CC),
 # Formosa (FM), La Pampa (LP), Chubut (CH)
@@ -137,6 +144,8 @@ Zone America/Rosario	-4:02:40 -	LMT	1894 Nov
 			-4:00	-	ART	1930 Dec
 			-4:00	Arg	AR%sT	1969 Oct  5
 			-3:00	Arg	AR%sT	1991 Jul
+			-3:00	-	ART	1999 Oct  3 0:00
+			-4:00	Arg	AR%sT	2000 Mar  3 0:00
 			-3:00	-	ART
 #
 # Cordoba (CB), Santiago del Estero (SE), Salta (SA), Tucuman (TM), La Rioja (LR), San Juan (SJ), San Luis (SL),
@@ -146,6 +155,8 @@ Zone America/Cordoba	-4:16:44 -	LMT	1894 Nov
 			-4:00	-	ART	1930 Dec
 			-4:00	Arg	AR%sT	1969 Oct  5
 			-3:00	Arg	AR%sT	1990 Jul
+			-3:00	-	ART	1999 Oct  3 0:00
+			-4:00	Arg	AR%sT	2000 Mar  3 0:00
 			-3:00	-	ART
 #
 # Jujuy (JY)
@@ -157,6 +168,8 @@ Zone America/Jujuy	-4:21:12 -	LMT	1894 Nov
 			-4:00	-	WART	1991 Oct  6
 			-4:00	1:00	WARST	1992 Mar 15
 			-4:00	-	WART	1992 Oct 18
+			-3:00	-	ART	1999 Oct  3 0:00
+			-4:00	Arg	AR%sT	2000 Mar  3 0:00
 			-3:00	-	ART
 #
 # Catamarca (CT)
@@ -167,6 +180,8 @@ Zone America/Catamarca	-4:23:08 -	LMT	1894 Nov
 			-3:00	Arg	AR%sT	1990 Jul
 			-3:00	-	ART	1991 Jul
 			-3:00	Arg	AR%sT	1992 Jul
+			-3:00	-	ART	1999 Oct  3 0:00
+			-4:00	Arg	AR%sT	2000 Mar  3 0:00
 			-3:00	-	ART
 #
 # Mendoza (MZ)
@@ -178,6 +193,8 @@ Zone America/Mendoza	-4:35:16 -	LMT	1894 Nov
 			-4:00	-	WART	1991 Oct 15
 			-4:00	1:00	WARST	1992 Mar  1
 			-4:00	-	WART	1992 Oct 18
+			-3:00	-	ART	1999 Oct  3 0:00
+			-4:00	Arg	AR%sT	2000 Mar  3 0:00
 			-3:00	-	ART
 
 # Aruba
diff --git a/share/zoneinfo/datfiles/yearistype.sh b/share/zoneinfo/datfiles/yearistype.sh
index 809f5492a1e..62d6365ecd9 100644
--- a/share/zoneinfo/datfiles/yearistype.sh
+++ b/share/zoneinfo/datfiles/yearistype.sh
@@ -1,26 +1,36 @@
 #! /bin/sh
 
-: '@(#)yearistype.sh	7.4'
+: '@(#)yearistype.sh	7.6'
+
+case $#-$1 in
+	2-|2-0*|2-*[!0-9]*)
+		echo "$0: wild year - $1" >&2
+		exit 1 ;;
+esac
 
 case $#-$2 in
-	2-even)		case $1 in
-				*[24680])			exit 0 ;;
-				*)				exit 1 ;;
-			esac ;;
-	2-nonpres)	case $1 in
-				*[02468][048]|*[13579][26])	exit 1 ;;
-				*)				exit 0 ;;
-			esac ;;
-	2-odd)		case $1 in
-				*[13579])			exit 0 ;;
-				*)				exit 1 ;;
-			esac ;;
-	2-uspres)	case $1 in
-				*[02468][048]|*[13579][26])	exit 0 ;;
-				*)				exit 1 ;;
-			esac ;;
-	2-*)		echo "$0: wild type - $2" >&2
-			exit 1 ;;
-	*)		echo "$0: usage is $0 year type" >&2
-			exit 1 ;;
+	2-even)	
+		case $1 in
+			*[24680])			exit 0 ;;
+			*)				exit 1 ;;
+		esac ;;
+	2-nonpres|2-nonuspres)
+		case $1 in
+			*[02468][048]|*[13579][26])	exit 1 ;;
+			*)				exit 0 ;;
+		esac ;;
+	2-odd)	
+		case $1 in
+			*[13579])			exit 0 ;;
+			*)				exit 1 ;;
+		esac ;;
+	2-uspres)
+		case $1 in
+			*[02468][048]|*[13579][26])	exit 0 ;;
+			*)				exit 1 ;;
+		esac ;;
+	2-*)	
+		echo "$0: wild type - $2" >&2 ;;
 esac
+
+echo "$0: usage is $0 year even|odd|uspres|nonpres|nonuspres" >&2
diff --git a/share/zoneinfo/datfiles/zone.tab b/share/zoneinfo/datfiles/zone.tab
index b65b6a352cd..401ab9ea255 100644
--- a/share/zoneinfo/datfiles/zone.tab
+++ b/share/zoneinfo/datfiles/zone.tab
@@ -1,4 +1,4 @@
-# @(#)zone.tab	1.18
+# @(#)zone.tab	1.19
 #
 # TZ zone descriptions
 #
@@ -247,6 +247,8 @@ MV	+0410+07330	Indian/Maldives
 MW	-1547+03500	Africa/Blantyre
 MX	+1924-09909	America/Mexico_City	Central Time - most locations
 MX	+2105-08646	America/Cancun	Central Time - Quintana Roo
+MX	+2058-08937	America/Merida	Central Time - Campeche, Yucatan
+MX	+2540-10019	America/Monterrey	Central Time - Coahuila, Durango, Nuevo Leon, Tamaulipas
 MX	+2313-10625	America/Mazatlan	Mountain Time - S Baja, Nayarit, Sinaloa
 MX	+2838-10605	America/Chihuahua	Mountain Time - Chihuahua
 MX	+2904-11058	America/Hermosillo	Mountain Standard Time - Sonora