diff --git a/contrib/tzdata/asia b/contrib/tzdata/asia
index cbb5dca86962..925cc36f0fb1 100644
--- a/contrib/tzdata/asia
+++ b/contrib/tzdata/asia
@@ -1,4 +1,4 @@
-# @(#)asia	8.68
+# @(#)asia	8.69
 # This file is in the public domain, so clarified as of
 # 2009-05-17 by Arthur David Olson.
 
diff --git a/contrib/tzdata/australasia b/contrib/tzdata/australasia
index acadef60805b..930beed32ed5 100644
--- a/contrib/tzdata/australasia
+++ b/contrib/tzdata/australasia
@@ -1,5 +1,5 @@
 # <pre>
-# @(#)australasia	8.27
+# @(#)australasia	8.28
 # This file is in the public domain, so clarified as of
 # 2009-05-17 by Arthur David Olson.
 
diff --git a/contrib/tzdata/backward b/contrib/tzdata/backward
index f1f95a894151..b8e591165118 100644
--- a/contrib/tzdata/backward
+++ b/contrib/tzdata/backward
@@ -1,5 +1,5 @@
 # <pre>
-# @(#)backward	8.9
+# @(#)backward	8.10
 # This file is in the public domain, so clarified as of
 # 2009-05-17 by Arthur David Olson.
 
@@ -67,7 +67,6 @@ Link	America/Havana		Cuba
 Link	Africa/Cairo		Egypt
 Link	Europe/Dublin		Eire
 Link	Europe/London		Europe/Belfast
-Link	Europe/Chisinau		Europe/Tiraspol
 Link	Europe/London		GB
 Link	Europe/London		GB-Eire
 Link	Etc/GMT			GMT+0
diff --git a/contrib/tzdata/europe b/contrib/tzdata/europe
index a2ec972b8247..22bdd3648b7e 100644
--- a/contrib/tzdata/europe
+++ b/contrib/tzdata/europe
@@ -1,5 +1,5 @@
 # <pre>
-# @(#)europe	8.38
+# @(#)europe	8.39
 # This file is in the public domain, so clarified as of
 # 2009-05-17 by Arthur David Olson.
 
@@ -1655,6 +1655,29 @@ Zone	Europe/Malta	0:58:04 -	LMT	1893 Nov  2 0:00s # Valletta
 # But [two people] separately reported via
 # Jesper Norgaard that as of 2001-01-24 Tiraspol was like Chisinau.
 # The Tiraspol entry has therefore been removed for now.
+#
+# From Alexander Krivenyshev (2011-10-17):
+# Pridnestrovian Moldavian Republic (PMR, also known as
+# "Pridnestrovie") has abolished seasonal clock change (no transition
+# to the Winter Time).
+#
+# News (in Russian):
+# <a href="http://www.kyivpost.ua/russia/news/pridnestrove-otkazalos-ot-perehoda-na-zimnee-vremya-30954.html">
+# http://www.kyivpost.ua/russia/news/pridnestrove-otkazalos-ot-perehoda-na-zimnee-vremya-30954.html
+# </a>
+#
+# <a href="http://www.allmoldova.com/moldova-news/1249064116.html">
+# http://www.allmoldova.com/moldova-news/1249064116.html
+# </a>
+#
+# The substance of this change (reinstatement of the Tiraspol entry)
+# is from a patch from Petr Machata (2011-10-17)
+#
+# From Tim Parenti (2011-10-19)
+# In addition, being situated at +4651+2938 would give Tiraspol
+# a pre-1880 LMT offset of 1:58:32.
+#
+# (which agrees with the earlier entry that had been removed)
 
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 Zone	Europe/Chisinau	1:55:20 -	LMT	1880
@@ -1671,6 +1694,21 @@ Zone	Europe/Chisinau	1:55:20 -	LMT	1880
 # See Romania commentary for the guessed 1997 transition to EU rules.
 			2:00	EU	EE%sT
 
+Zone	Europe/Tiraspol	1:58:32 -	LMT	1880
+			1:55	-	CMT	1918 Feb 15 # Chisinau MT
+			1:44:24	-	BMT	1931 Jul 24 # Bucharest MT
+			2:00	Romania	EE%sT	1940 Aug 15
+			2:00	1:00	EEST	1941 Jul 17
+			1:00	C-Eur	CE%sT	1944 Aug 24
+			3:00	Russia	MSK/MSD	1990
+			3:00	-	MSK	1990 May 6
+			2:00	-	EET	1991
+			2:00	Russia	EE%sT	1992
+			2:00	E-Eur	EE%sT	1997
+# See Romania commentary for the guessed 1997 transition to EU rules.
+			2:00	EU	EE%sT	2011 Mar lastSun 1:00u
+			3:00	-	FET # Further-eastern European Time
+
 # Monaco
 # Shanks & Pottenger give 0:09:20 for Paris Mean Time; go with Howse's
 # more precise 0:09:21.
@@ -2651,6 +2689,28 @@ Link	Europe/Istanbul	Asia/Istanbul	# Istanbul is in both continents.
 # <a href="http://www.pravda.com.ua/rus/news/2011/09/20/6600616/">
 # http://www.pravda.com.ua/rus/news/2011/09/20/6600616/
 # </a>
+#
+# From Philip Pizzey (2011-10-18):
+# Today my Ukrainian colleagues have informed me that the
+# Ukrainian parliament have decided that they will go to winter
+# time this year after all.
+#
+# From Udo Schwedt (2011-10-18):
+# As far as I understand, the recent change to the Ukranian time zone 
+# (Europe/Kiev) to introduce permanent daylight saving time (similar
+# to Russia) was reverted today:
+#
+# <a href="http://portal.rada.gov.ua/rada/control/en/publish/article/info_left?art_id=287324&cat_id=105995">
+# http://portal.rada.gov.ua/rada/control/en/publish/article/info_left?art_id=287324&cat_id=105995
+# </a>
+#
+# Also reported by Alexander Bokovoy (2011-10-18) who also noted:
+# The law documents themselves are at
+#
+# <a href="http://w1.c1.rada.gov.ua/pls/zweb_n/webproc4_1?id=&pf3511=41484">
+# http://w1.c1.rada.gov.ua/pls/zweb_n/webproc4_1?id=&pf3511=41484
+# </a>
+
 
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
 # Most of Ukraine since 1970 has been like Kiev.
@@ -2665,8 +2725,7 @@ Zone Europe/Kiev	2:02:04 -	LMT	1880
 			3:00	-	MSK	1990 Jul  1 2:00
 			2:00	-	EET	1992
 			2:00	E-Eur	EE%sT	1995
-			2:00	EU	EE%sT	2011 Mar lastSun 1:00u
-			3:00	-	FET # Further-eastern European Time
+			2:00	EU	EE%sT
 # Ruthenia used CET 1990/1991.
 # "Uzhhorod" is the transliteration of the Ukrainian name, but
 # "Uzhgorod" is more common in English.
@@ -2680,8 +2739,7 @@ Zone Europe/Uzhgorod	1:29:12 -	LMT	1890 Oct
 			1:00	-	CET	1991 Mar 31 3:00
 			2:00	-	EET	1992
 			2:00	E-Eur	EE%sT	1995
-			2:00	EU	EE%sT	2011 Mar lastSun 1:00u
-			3:00	-	FET # Further-eastern European Time
+			2:00	EU	EE%sT
 # Zaporozh'ye and eastern Lugansk oblasts observed DST 1990/1991.
 # "Zaporizhia" is the transliteration of the Ukrainian name, but
 # "Zaporozh'ye" is more common in English.  Use the common English
@@ -2694,8 +2752,7 @@ Zone Europe/Zaporozhye	2:20:40 -	LMT	1880
 			1:00	C-Eur	CE%sT	1943 Oct 25
 			3:00	Russia	MSK/MSD	1991 Mar 31 2:00
 			2:00	E-Eur	EE%sT	1995
-			2:00	EU	EE%sT	2011 Mar lastSun 1:00u
-			3:00	-	FET # Further-eastern European Time
+			2:00	EU	EE%sT
 # Central Crimea used Moscow time 1994/1997.
 Zone Europe/Simferopol	2:16:24 -	LMT	1880
 			2:16	-	SMT	1924 May  2 # Simferopol Mean T
@@ -2720,8 +2777,7 @@ Zone Europe/Simferopol	2:16:24 -	LMT	1880
 # Assume it happened in March by not changing the clocks.
 			3:00	Russia	MSK/MSD	1997
 			3:00	-	MSK	1997 Mar lastSun 1:00u
-			2:00	EU	EE%sT	2011 Mar lastSun 1:00u
-			3:00	-	FET # Further-eastern European Time
+			2:00	EU	EE%sT
 
 ###############################################################################
 
diff --git a/contrib/tzdata/northamerica b/contrib/tzdata/northamerica
index 65963d8c30c5..68a7cd5191dd 100644
--- a/contrib/tzdata/northamerica
+++ b/contrib/tzdata/northamerica
@@ -1,5 +1,5 @@
 # <pre>
-# @(#)northamerica	8.49
+# @(#)northamerica	8.50
 # This file is in the public domain, so clarified as of
 # 2009-05-17 by Arthur David Olson.
 
diff --git a/contrib/tzdata/southamerica b/contrib/tzdata/southamerica
index cce8d3c0fe97..6012005c4850 100644
--- a/contrib/tzdata/southamerica
+++ b/contrib/tzdata/southamerica
@@ -1,5 +1,5 @@
 # <pre>
-# @(#)southamerica	8.50
+# @(#)southamerica	8.52
 # This file is in the public domain, so clarified as of
 # 2009-05-17 by Arthur David Olson.
 
@@ -818,6 +818,19 @@ Zone	America/La_Paz	-4:32:36 -	LMT	1890
 # oficial agency about time in Brazil, and she confirmed that the old rule is
 # still in force.
 
+# From Guilherme Bernardes Rodrigues (2011-10-14)
+# It's official, the President signed a decree that includes Bahia in summer
+# time.
+#	 [ and in a second message (same day): ]
+# I found the decree.
+#
+# DECRETO No- 7.584, DE 13 DE OUTUBRO DE 2011
+# Link :
+# <a href="http://www.in.gov.br/visualiza/index.jsp?data=13/10/2011&jornal=1000&pagina=6&totalArquivos=6">
+# http://www.in.gov.br/visualiza/index.jsp?data=13/10/2011&jornal=1000&pagina=6&totalArquivos=6
+# </a>
+
+
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 # Decree <a href="http://pcdsh01.on.br/HV20466.htm">20,466</a> (1931-10-01)
 # Decree <a href="http://pcdsh01.on.br/HV21896.htm">21,896</a> (1932-01-10)
@@ -1054,10 +1067,8 @@ Zone America/Maceio	-2:22:52 -	LMT	1914
 # of America/Salvador.
 Zone America/Bahia	-2:34:04 -	LMT	1914
 			-3:00	Brazil	BR%sT	2003 Sep 24
-			-3:00	-	BRT
-# as noted above, not yet in operation.
-#			-3:00	-	BRT	2011 Oct 16
-#			-3:00	Brazil	BR%sT
+			-3:00	-	BRT	2011 Oct 16
+			-3:00	Brazil	BR%sT
 #
 # Goias (GO), Distrito Federal (DF), Minas Gerais (MG),
 # Espirito Santo (ES), Rio de Janeiro (RJ), Sao Paulo (SP), Parana (PR),
diff --git a/contrib/tzdata/zone.tab b/contrib/tzdata/zone.tab
index 0c1969664e90..90a371cd5016 100644
--- a/contrib/tzdata/zone.tab
+++ b/contrib/tzdata/zone.tab
@@ -1,5 +1,5 @@
 # <pre>
-# @(#)zone.tab	8.49
+# @(#)zone.tab	8.50
 # This file is in the public domain, so clarified as of
 # 2009-05-17 by Arthur David Olson.
 #
@@ -258,6 +258,7 @@ LY	+3254+01311	Africa/Tripoli
 MA	+3339-00735	Africa/Casablanca
 MC	+4342+00723	Europe/Monaco
 MD	+4700+02850	Europe/Chisinau
+MD	+4651+02938	Europe/Tiraspol	Pridnestrovie
 ME	+4226+01916	Europe/Podgorica
 MF	+1804-06305	America/Marigot
 MG	-1855+04731	Indian/Antananarivo