--- southamerica-orig	2008-09-10 11:10:49.000000000 -0300
+++ southamerica	2008-09-10 17:05:07.000000000 -0300
@@ -724,10 +724,21 @@
 Rule	Brazil	2007	only	-	Feb	25	 0:00	0	-
 # Decree <a href="http://pcdsh01.on.br/DecHV6212.gif">6,212</a> (2007-09-26),
 # adopted by the same states as before.
-Rule	Brazil	2007	max	-	Oct	Sun>=8	 0:00	1:00	S
+Rule	Brazil	2007	only	-	Oct	Sun>=8	 0:00	1:00	S
 Rule	Brazil	2008	max	-	Feb	Sun>=15	 0:00	0	-
-# The latest ruleset listed above says that the following states observe DST:
-# DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP.
+# Decree <a href="http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm">6,558</a>
+# At last a fixed rule! 3rd Sun Oct to 3rd Sun Feb. There is an
+# exception when the return date is a Carnival Sunday then the return
+# will be the next Sunday. Exceptions until 2038 calculated bellow
+# adopted by the same states as before.
+Rule	Brazil	2008	max	-	Oct	Sun>=15	 0:00	1:00	S
+Rule	Brazil	2012	only	-	Feb	26	 0:00	0	-
+Rule	Brazil	2015	only	-	Feb	22	 0:00	0	-
+Rule	Brazil	2023	only	-	Feb	26	 0:00	0	-
+Rule	Brazil	2026	only	-	Feb	22	 0:00	0	-
+Rule	Brazil	2034	only	-	Feb	26	 0:00	0	-
+Rule	Brazil	2037	only	-	Feb	22	 0:00	0	-
+
 # For dates after mid-2008, the above rules with TO="max" are guesses
 # and are quite possibly wrong, but are more likely than no DST at all.