diff --git a/share/zoneinfo/backward b/share/zoneinfo/backward
index 7c922604e282..a2ba2e4a91a8 100644
--- a/share/zoneinfo/backward
+++ b/share/zoneinfo/backward
@@ -1,4 +1,4 @@
-# @(#)backward	8.3
+# @(#)backward	8.4
 
 # This file provides links between current names for time zones
 # and their old names.  Many names changed in late 1993.
@@ -30,6 +30,7 @@ Link	Asia/Thimphu		Asia/Thimbu
 Link	Asia/Makassar		Asia/Ujung_Pandang
 Link	Asia/Ulaanbaatar	Asia/Ulan_Bator
 Link	Atlantic/Faroe		Atlantic/Faeroe
+Link	Europe/Oslo		Atlantic/Jan_Mayen
 Link	Australia/Sydney	Australia/ACT
 Link	Australia/Sydney	Australia/Canberra
 Link	Australia/Lord_Howe	Australia/LHI
diff --git a/share/zoneinfo/europe b/share/zoneinfo/europe
index 60290ddc5a97..73eed00fc2c1 100644
--- a/share/zoneinfo/europe
+++ b/share/zoneinfo/europe
@@ -1,4 +1,4 @@
-# @(#)europe	8.11
+# @(#)europe	8.12
 # <pre>
 
 # This data is by no means authoritative; if you think you know better,
@@ -1714,7 +1714,6 @@ Zone	Europe/Oslo	0:43:00 -	LMT	1895 Jan  1
 # come up with more definitive info about the timekeeping during the
 # war years it's probably best just do do the following for now:
 Link	Europe/Oslo	Arctic/Longyearbyen
-Link	Europe/Oslo	Atlantic/Jan_Mayen
 
 # Poland
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
diff --git a/share/zoneinfo/southamerica b/share/zoneinfo/southamerica
index 200b72069b14..ab4ea3a6c91a 100644
--- a/share/zoneinfo/southamerica
+++ b/share/zoneinfo/southamerica
@@ -1,4 +1,4 @@
-# @(#)southamerica	8.13
+# @(#)southamerica	8.15
 # <pre>
 
 # This data is by no means authoritative; if you think you know better,
@@ -105,7 +105,11 @@ Rule	Arg	1989	1992	-	Oct	Sun>=15	0:00	1:00	S
 # which did not result in the switch of a time zone, as they stayed 9 hours
 # 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 Paul Eggert (2007-12-28):
+# DST was set to expire on March 5, not March 3, but since it was converted
+# to standard time on March 3 it's more convenient for us to pretend that
+# it ended on March 3.
+Rule	Arg	2000	only	-	Mar	3	0:00	0	-
 #
 # From Peter Gradelski via Steffen Thorsen (2000-03-01):
 # We just checked with our Sao Paulo office and they say the government of
@@ -140,6 +144,30 @@ Rule	Arg	2000	only	-	Mar	Sun>=1	0:00	0	-
 # This kind of things had always been done this way in Argentina.
 # We are still -03:00 all year round in all of the country.
 #
+# From Steffen Thorsen (2007-12-21):
+# A user (Leonardo Chaim) reported that Argentina will adopt DST....
+# all of the country (all Zone-entries) are affected.  News reports like
+# http://www.lanacion.com.ar/opinion/nota.asp?nota_id=973037 indicate
+# that Argentina will use DST next year as well, from October to
+# March, although exact rules are not given.
+#
+# From Jesper Norgaard Welen (2007-12-26)
+# The last hurdle of Argentina DST is over, the proposal was approved in
+# the lower chamber too (Deputados) with a vote 192 for and 2 against.
+# By the way thanks to Mariano Absatz and Daniel Mario Vega for the link to
+# the original scanned proposal, where the dates and the zero hours are
+# clear and unambiguous...This is the article about final approval:
+# <a href="http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996">
+# http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996
+# </a>
+#
+# From Paul Eggert (2007-12-22):
+# For dates after mid-2008, the following rules are my guesses and
+# are quite possibly wrong, but are more likely than no DST at all.
+Rule	Arg	2007	only	-	Dec	30	0:00	1:00	S
+Rule	Arg	2008	max	-	Mar	Sun>=15	0:00	0	-
+Rule	Arg	2008	max	-	Oct	Sun>=1	0:00	1:00	S
+ 
 # From Mariano Absatz (2004-05-21):
 # Today it was officially published that the Province of Mendoza is changing
 # its timezone this winter... starting tomorrow night....
@@ -214,7 +242,7 @@ Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31
 			-4:00	Arg	AR%sT	1969 Oct  5
 			-3:00	Arg	AR%sT	1999 Oct  3
 			-4:00	Arg	AR%sT	2000 Mar  3
-			-3:00	-	ART
+			-3:00	Arg	AR%sT
 #
 # Santa Fe (SF), Entre Rios (ER), Corrientes (CN), Misiones (MN), Chaco (CC),
 # Formosa (FM), Salta (SA), Santiago del Estero (SE), Cordoba (CB),
@@ -237,7 +265,7 @@ Zone America/Argentina/Cordoba -4:16:48 - LMT	1894 Oct 31
 			-4:00	-	WART	1991 Oct 20
 			-3:00	Arg	AR%sT	1999 Oct  3
 			-4:00	Arg	AR%sT	2000 Mar  3
-			-3:00	-	ART
+			-3:00	Arg	AR%sT
 #
 # Tucuman (TM)
 Zone America/Argentina/Tucuman -4:20:52 - LMT	1894 Oct 31
@@ -250,7 +278,7 @@ Zone America/Argentina/Tucuman -4:20:52 - LMT	1894 Oct 31
 			-4:00	Arg	AR%sT	2000 Mar  3
 			-3:00	-	ART	2004 Jun  1
 			-4:00	-	WART	2004 Jun 13
-			-3:00	-	ART
+			-3:00	Arg	AR%sT
 #
 # La Rioja (LR)
 Zone America/Argentina/La_Rioja -4:27:24 - LMT	1894 Oct 31
@@ -263,7 +291,7 @@ Zone America/Argentina/La_Rioja -4:27:24 - LMT	1894 Oct 31
 			-4:00	Arg	AR%sT	2000 Mar  3
 			-3:00	-	ART	2004 Jun  1
 			-4:00	-	WART	2004 Jun 20
-			-3:00	-	ART
+			-3:00	Arg	AR%sT
 #
 # San Juan (SJ)
 Zone America/Argentina/San_Juan -4:34:04 - LMT	1894 Oct 31
@@ -276,7 +304,7 @@ Zone America/Argentina/San_Juan -4:34:04 - LMT	1894 Oct 31
 			-4:00	Arg	AR%sT	2000 Mar  3
 			-3:00	-	ART	2004 May 31
 			-4:00	-	WART	2004 Jul 25
-			-3:00	-	ART
+			-3:00	Arg	AR%sT
 #
 # Jujuy (JY)
 Zone America/Argentina/Jujuy -4:21:12 -	LMT	1894 Oct 31
@@ -290,7 +318,7 @@ Zone America/Argentina/Jujuy -4:21:12 -	LMT	1894 Oct 31
 			-3:00	1:00	ARST	1992
 			-3:00	Arg	AR%sT	1999 Oct  3
 			-4:00	Arg	AR%sT	2000 Mar  3
-			-3:00	-	ART
+			-3:00	Arg	AR%sT
 #
 # Catamarca (CT), Chubut (CH)
 Zone America/Argentina/Catamarca -4:23:08 - LMT	1894 Oct 31
@@ -303,7 +331,7 @@ Zone America/Argentina/Catamarca -4:23:08 - LMT	1894 Oct 31
 			-4:00	Arg	AR%sT	2000 Mar  3
 			-3:00	-	ART	2004 Jun  1
 			-4:00	-	WART	2004 Jun 20
-			-3:00	-	ART
+			-3:00	Arg	AR%sT
 #
 # Mendoza (MZ)
 Zone America/Argentina/Mendoza -4:35:16 - LMT	1894 Oct 31
@@ -320,7 +348,7 @@ Zone America/Argentina/Mendoza -4:35:16 - LMT	1894 Oct 31
 			-4:00	Arg	AR%sT	2000 Mar  3
 			-3:00	-	ART	2004 May 23
 			-4:00	-	WART	2004 Sep 26
-			-3:00	-	ART
+			-3:00	Arg	AR%sT
 #
 # Santa Cruz (SC)
 Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31
@@ -331,7 +359,7 @@ Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31
 			-4:00	Arg	AR%sT	2000 Mar  3
 			-3:00	-	ART	2004 Jun  1
 			-4:00	-	WART	2004 Jun 20
-			-3:00	-	ART
+			-3:00	Arg	AR%sT
 #
 # Tierra del Fuego, Antartida e Islas del Atlantico Sur (TF)
 Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31
@@ -342,7 +370,7 @@ Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31
 			-4:00	Arg	AR%sT	2000 Mar  3
 			-3:00	-	ART	2004 May 30
 			-4:00	-	WART	2004 Jun 20
-			-3:00	-	ART
+			-3:00	Arg	AR%sT
 
 # Aruba
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
diff --git a/share/zoneinfo/zone.tab b/share/zoneinfo/zone.tab
index e75cdbbe61fa..636694566c52 100644
--- a/share/zoneinfo/zone.tab
+++ b/share/zoneinfo/zone.tab
@@ -1,4 +1,4 @@
-# @(#)zone.tab	8.12
+# @(#)zone.tab	8.13
 #
 # TZ zone descriptions
 #
@@ -341,8 +341,7 @@ SE	+5920+01803	Europe/Stockholm
 SG	+0117+10351	Asia/Singapore
 SH	-1555-00542	Atlantic/St_Helena
 SI	+4603+01431	Europe/Ljubljana
-SJ	+7800+01600	Arctic/Longyearbyen	Svalbard
-SJ	+7059-00805	Atlantic/Jan_Mayen	Jan Mayen
+SJ	+7800+01600	Arctic/Longyearbyen
 SK	+4809+01707	Europe/Bratislava
 SL	+0830-01315	Africa/Freetown
 SM	+4355+01228	Europe/San_Marino