Indiana time zones

Andy Lipscomb AndyLipscomb at decosimo.com
Fri Jan 20 17:38:22 UTC 2006


Actually, there are seven other counties that are moving from Eastern to Central time. Since they, like Starke County, do so at the time change, they will simply skip the spring-forward--2:00 EST and 2:00 CDT are identical (both equal 21:00 UTC on the previous day). It appears to me that this requires creating a new zone for the other seven counties, which I show below.

# From J. Andrew Lipscomb (2006-01-20):
# Department of Transportation ruling http://www.dot.gov/affairs/dot0406.htm
# adds eight new counties to the Central (America/Chicago) zone. Six are in
# the Evansville area, two near Chicago. One of them (Starke) already has its
# own entry; as for the other seven, the largest city in them (and an old
# territorial capital) is Vincennes. I suggest that for the exemplar city of
# the seven counties.

# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Indiana/Vincennes -5:50:04 - LMT 1883 Nov 18 12:09:56
			-6:00	US	C%sT	1920
			-6:00 Indianapolis C%sT	1942
			-6:00	US	C%sT	1946
			-6:00 Indianapolis C%sT	1955 Apr 24 2:00
			-5:00	-	EST	1957 Sep 29 2:00
			-6:00	-	CST	1958 Apr 27 2:00
			-5:00	-	EST	1969
			-5:00	US	E%sT	1971
			-5:00	-	EST	2006 Apr 2 2:00
			-6:00	US	C%sT

In addition to the section above, the new zone will need to be added to the zone.tab file. Vincennes' location is
+384042-0873058.

And to cover Starke County:

# From J. Andrew Lipscomb (2006-01-20): 
# The Department of Transportation placed Starke County back on Central time,
# beginning at the 2006 DST start.
# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER
Rule	Starke	1947	1961	-	Apr	lastSun	2:00	1:00	D
Rule	Starke	1947	1954	-	Sep	lastSun	2:00	0	S
Rule	Starke	1955	1956	-	Oct	lastSun	2:00	0	S
Rule	Starke	1957	1958	-	Sep	lastSun	2:00	0	S
Rule	Starke	1959	1961	-	Oct	lastSun	2:00	0	S
# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
Zone America/Indiana/Knox -5:46:30 -	LMT	1883 Nov 18 12:13:30
			-6:00	US	C%sT	1947
			-6:00	Starke	C%sT	1962 Apr 29 2:00
			-5:00	-	EST	1963 Oct 27 2:00
			-6:00	US	C%sT	1991 Oct 27 2:00
			-5:00	-	EST	2006 Apr 2 2:00
			-6:00	US	C%sT  




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