--- tzdata2004d.orig/southamerica	2004-09-22 09:27:07.000000000 -0300
+++ tzdata2004d/southamerica	2004-10-04 15:03:09.907314288 -0300
@@ -556,11 +556,18 @@
 Rule	Brazil	2002	only	-	Nov	 3	 0:00	1:00	S
 # Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO.
 # <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm"></a>
-Rule	Brazil	2003	max	-	Oct	Sun>=15	 0:00	1:00	S
+Rule	Brazil	2003	only	-	Oct	Sun>=15	 0:00	1:00	S
 # The latest ruleset listed above says that the following states observe DST:
 # DF, ES, GO, MG, MS, PR, RJ, RS, SC, SP.
 #
-# For dates after mid-2004, the above rules with TO="max" are guesses
+# Decree 5,223 (2004-10-01) postponed DST to November, 2nd because of the
+# municipal elections taking place in Brazil.
+# List of states that will observe DST:
+# RS, SC, PR, SP, RJ, ES, MG, GO, MT, MS and DF.
+Rule	Brazil	2004	only	-	Nov	2	0:00	1:00	S
+Rule	Brazil	2005	max	-	Oct	Sun>=15	0:00	1:00	S
+#
+# For dates after mid-2005, the above rules with TO="max" are guesses
 # and are quite possibly wrong, but are more likely than no DST at all.
 
 
@@ -648,7 +655,8 @@
 # Mato Grosso (MT)
 Zone America/Cuiaba	-3:44:20 -	LMT	1914
 			-4:00	Brazil	AM%sT	2003 Sep 24
-			-4:00	-	AMT
+			-4:00	-	AMT	2004	Nov	2
+			-4:00	Brazil	AM%sT
 #
 # west Para (PA), Rondonia (RO)
 # West Para includes Altamira, Oribidos, Prainha, Oriximina, and Santarem.