[tz] Creston (was Updated Proposed time zone package changes (Armenia, Chile, Falklands, Tokelau, Antarctica, Creston(Canada)))

[Chris Walton]

Robert,

I dug into your complete patch and I see you did manage to insert the proper rules for the period from 1864 to 1916.

Personally I prefer the inclusion of all the zone changes... even if they don't result in clock changes.
But I won't be upset if you want to keep the rules simple!
The rules inside your full patch proposal appear to provide the correct UTC offsets.

As for your comment that "sources differ":
Both sources come from Tammy Hardwick of the Creston Museum.
The reason they differ is that Tammy discovered new information after she wrote the first article.  She explained that to me in an e-mail.

+# It also is not clear whether in the period after standard time was adopted
+# (1884) until 1916 whether Creston was PST or MST (-8:00 or -7:00).
+# Sources differ.   For now we will stick with MST.   The transition dates
+# are guesses.
+
 # Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
 Rule	Vanc	1918	only	-	Apr	14	2:00	1:00	D
-Rule	Vanc	1918	only	-	Oct	31	2:00	0	S
+Rule	Vanc	1918	only	-	Oct	27	2:00	0	S
 Rule	Vanc	1942	only	-	Feb	 9	2:00	1:00	W # War
 Rule	Vanc	1945	only	-	Aug	14	23:00u	1:00	P # Peace
 Rule	Vanc	1945	only	-	Sep	30	2:00	0	S
@@ -1813,7 +1892,10 @@
 			-8:00	Canada	P%sT	1947
 			-8:00	Vanc	P%sT	1972 Aug 30 2:00
 			-7:00	-	MST
-
+Zone America/Creston	-7:46:04 -	LMT	1884
+			-7:00	-	MST	1916 Oct 1
+			-8:00	-	PST	1918 Jun 2
+			-7:00	-	MST