Venezuela timezone change from utc -4 to utc -4:30 Sep 24 2007

[artemis3]

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Hello, i'm not quite sure i understand the tzdata file format. I would
like to add a rule to reflect this change, so would something like this
work?

# Venezuela
# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
Rule	Vzla	1964	max	-	Jan	1	 0:00	0:30	S
Rule	Vzla	2007	max	-	Sep	24	 0:00	0	-
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone	America/Caracas	-4:27:44 -	LMT	1890
			-4:27:40 -	CMT	1912 Feb 12 # Caracas Mean Time?
			-4:30	-	VET	1964	     # Venezuela Time
			-4:00	Vzla	VET	2007 Sep 23
			-4:30	Vzla	VET


Historically the change from UTC -4:30 to UTC -4 was in January 1964
(not 1965), skipping the very first 30 minutes of that year; how would a
rule reflect this?

This will end on Sep 23. From September 24 2007 when we are going back
to UTC -4:30.
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