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index a21bf895b053..ac1eeef4d533 100644
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@@ -1,5 +1,5 @@
# <pre>
-# @(#)northamerica 8.51
+# @(#)northamerica 8.52
# This file is in the public domain, so clarified as of
# 2009-05-17 by Arthur David Olson.
@@ -1120,9 +1120,26 @@ Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00
# For now, assume all of DST-observing Canada will fall into line with the
# new US DST rules,
+# From Chris Walton (2011-12-01)
+# In the first of Tammy Hardwick's articles
+# <a href="http://www.ilovecreston.com/?p=articles&t=spec&ar=260">
+# http://www.ilovecreston.com/?p=articles&t=spec&ar=260
+# </a>
+# she quotes the Friday November 1/1918 edition of the Creston Review.
+# The quote includes these two statements:
+# 'Sunday the CPR went back to the old system of time...'
+# '... The daylight saving scheme was dropped all over Canada at the same time,'
+# These statements refer to a transition from daylight time to standard time
+# that occurred nationally on Sunday October 27/1918. This transition was
+# also documented in the Saturday October 26/1918 edition of the Toronto Star.
+
+# In light of that evidence, we alter the date from the earlier believed
+# Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day
+# than Thursday) in all Canadian rulesets.
+
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Canada 1918 only - Apr 14 2:00 1:00 D
-Rule Canada 1918 only - Oct 31 2:00 0 S
+Rule Canada 1918 only - Oct 27 2:00 0 S
Rule Canada 1942 only - Feb 9 2:00 1:00 W # War
Rule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace
Rule Canada 1945 only - Sep 30 2:00 0 S
@@ -1645,7 +1662,7 @@ Zone America/Atikokan -6:06:28 - LMT 1895
Rule Winn 1916 only - Apr 23 0:00 1:00 D
Rule Winn 1916 only - Sep 17 0:00 0 S
Rule Winn 1918 only - Apr 14 2:00 1:00 D
-Rule Winn 1918 only - Oct 31 2:00 0 S
+Rule Winn 1918 only - Oct 27 2:00 0 S
Rule Winn 1937 only - May 16 2:00 1:00 D
Rule Winn 1937 only - Sep 26 2:00 0 S
Rule Winn 1942 only - Feb 9 2:00 1:00 W # War
@@ -1728,7 +1745,7 @@ Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Regina 1918 only - Apr 14 2:00 1:00 D
-Rule Regina 1918 only - Oct 31 2:00 0 S
+Rule Regina 1918 only - Oct 27 2:00 0 S
Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D
Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S
Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D
@@ -1765,7 +1782,7 @@ Zone America/Swift_Current -7:11:20 - LMT 1905 Sep
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D
-Rule Edm 1918 only - Oct 31 2:00 0 S
+Rule Edm 1918 only - Oct 27 2:00 0 S
Rule Edm 1919 only - May 27 2:00 0 S
Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D
Rule Edm 1920 only - Oct lastSun 2:00 0 S
@@ -1795,9 +1812,68 @@ Zone America/Edmonton -7:33:52 - LMT 1906 Sep
# Dawson Creek uses MST. Much of east BC is like Edmonton.
# Matthews and Vincent (1998) write that Creston is like Dawson Creek.
+# It seems though that (re: Creston) is not entirely correct:
+
+# From Chris Walton (2011-12-01):
+# There are two areas within the Canadian province of British Columbia
+# that do not currently observe daylight saving:
+# a) The Creston Valley (includes the town of Creston and surrounding area)
+# b) The eastern half of the Peace River Regional District
+# (includes the cities of Dawson Creek and Fort St. John)
+
+# Earlier this year I stumbled across a detailed article about the time
+# keeping history of Creston; it was written by Tammy Hardwick who is the
+# manager of the Creston & District Museum. The article was written in May 2009.
+# <a href="http://www.ilovecreston.com/?p=articles&t=spec&ar=260">
+# http://www.ilovecreston.com/?p=articles&t=spec&ar=260
+# </a>
+# According to the article, Creston has not changed its clocks since June 1918.
+# i.e. Creston has been stuck on UTC-7 for 93 years.
+# Dawson Creek, on the other hand, changed its clocks as recently as April 1972.
+
+# Unfortunately the exact date for the time change in June 1918 remains
+# unknown and will be difficult to ascertain. I e-mailed Tammy a few months
+# ago to ask if Sunday June 2 was a reasonable guess. She said it was just
+# as plausible as any other date (in June). She also said that after writing the
+# article she had discovered another time change in 1916; this is the subject
+# of another article which she wrote in October 2010.
+# <a href="http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56">
+# http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56
+# </a>
+
+# Here is a summary of the three clock change events in Creston's history:
+# 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7)
+# Exact date unknown
+# 2. Oct 1916: switch to Pacific Standard Time (GMT-8)
+# Exact date in October unknown; Sunday October 1 is a reasonable guess.
+# 3. June 1918: switch to Pacific Daylight Time (GMT-7)
+# Exact date in June unknown; Sunday June 2 is a reasonable guess.
+# note#1:
+# On Oct 27/1918 when daylight saving ended in the rest of Canada,
+# Creston did not change its clocks.
+# note#2:
+# During WWII when the Federal Government legislated a mandatory clock change,
+# Creston did not oblige.
+# note#3:
+# There is no guarantee that Creston will remain on Mountain Standard Time
+# (UTC-7) forever.
+# The subject was debated at least once this year by the town Council.
+# <a href="http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html">
+# http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html
+# </a>
+
+# During a period WWII, summer time (Daylight saying) was mandatory in Canada.
+# In Creston, that was handled by shifting the area to PST (-8:00) then applying
+# summer time to cause the offset to be -7:00, the same as it had been before
+# the change. It can be argued that the timezone abbreviation during this
+# period should be PDT rather than MST, but that doesn't seem important enough
+# (to anyone) to further complicate the rules.
+
+# The transition dates (and times) 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 +1889,10 @@ Zone America/Dawson_Creek -8:00:56 - LMT 1884
-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
# Northwest Territories, Nunavut, Yukon