diff --git a/antarctica b/antarctica
index 3657056..e428f4d 100644
--- a/antarctica
+++ b/antarctica
@@ -37,11 +37,9 @@ Rule	ChileAQ	1970	max	-	Mar	Sun>=9	0:00	0	-
 # Davis, Vestfold Hills, since 1957-01-13 (except 1965-01 -  1969-02)
 # Mawson, Holme Bay, since 1954-02-13
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
-#Updated Zone Antarctica/Casey 1997 Nov 19
 Zone Antarctica/Casey	0	-	___	1969
 			8:00	-	WST	# Western (Aus) Standard Time
 #Zone Antartica/Davis	unknown
-#Updated Zone Antarctica/Mawson 1997 Nov 19
 Zone Antarctica/Mawson	0	-	___	1954 Feb 13
 			6:00	-	MAWT	# Mawson Time
 # References:
@@ -79,7 +77,6 @@ Zone Antarctica/Mawson	0	-	___	1954 Feb 13
 # St Paul Island - near Amsterdam, uninhabited since 1931
 #
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
-#Updated Zone Indian/Kerguelen 1997 Nov 19
 Zone Indian/Kerguelen	0	-	___	1950	# Port-aux-Francais
 			5:00	-	TFT	# ISO code TF Time
 #
@@ -90,7 +87,6 @@ Zone Indian/Kerguelen	0	-	___	1950	# Port-aux-Francais
 # It was destroyed by fire on 1952-01-14.
 #
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
-#Updated Zone Antarctica/DumontDUrville 1997 Nov 19
 Zone Antarctica/DumontDUrville 0 -	___	1947
 			10:00	-	PMT	1952 Jan 14 # Port-Martin Time
 			0	-	___	1956 Nov
@@ -178,7 +174,6 @@ Rule	NZAQ	1990	max	-	Mar	Sun>=15	2:00s	0	S
 # Palmer used to be supplied from Argentina.
 #
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
-#Updated Zone Antarctica/Palmer 1997 Nov 19
 Zone Antarctica/Palmer	0	-	___	1965
 			-4:00	ArgAQ	AR%sT	1969 Oct 5
 			-3:00	ArgAQ	AR%sT	1982 May
@@ -187,7 +182,6 @@ Zone Antarctica/Palmer	0	-	___	1965
 #
 # McMurdo, Ross Island, since 1956
 # Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
-#Updated Zone Antarctica/McMurdo 1997 Nov 19
 Zone Antarctica/McMurdo	0	-	___	1956
 			12:00	NZAQ	NZ%sT
 #