>From 155c8a6d99a4b5aae3310504f3b979bd6fbbc940 Mon Sep 17 00:00:00 2001
From: Paul Eggert <eggert@cs.ucla.edu>
Date: Fri, 17 Apr 2015 19:10:32 -0700
Subject: [PROPOSED PATCH] Whitehorse switched to UTC-8 on 1967-05-28

* northamerica (America/Whitehorse):
The switch from UTC-9 to UTC-8 was on 1967-05-28, not 1966-07-01.
(Thanks to Brian Inglis and Dennis Ferguson.)
* NEWS: Document this.
---
 NEWS         | 10 ++++++----
 northamerica | 13 ++++++++++++-
 2 files changed, 18 insertions(+), 5 deletions(-)

diff --git a/NEWS b/NEWS
index 445bce2..2baf42f 100644
--- a/NEWS
+++ b/NEWS
@@ -2,6 +2,12 @@ News for the tz database
 
 Unreleased, experimental changes
 
+  Changes affecting past time stamps
+
+    America/Whitehorse switched from UTC-9 to UTC-8 on 1967-05-28, not
+    1966-07-01.  Also, Yukon's time zone history is documented better.
+    (Thanks to Brian Inglis and Dennis Ferguson.)
+
   Change affecting past and future time zone abbreviations
 
     The abbreviations for Hawaii-Aleutian standard and daylight times
@@ -9,10 +15,6 @@ Unreleased, experimental changes
     Printing Office style.  This affects only America/Adak since 1983,
     as America/Honolulu was already using the new style.
 
-  Changes affecting commentary
-
-    Yukon's time zone history is documented better.  (Thanks to Brian Inglis.)
-
 
 Release 2015c - 2015-04-11 08:55:55 -0700
 
diff --git a/northamerica b/northamerica
index dde9367..c3af9eb 100644
--- a/northamerica
+++ b/northamerica
@@ -1842,6 +1842,17 @@ Zone America/Creston	-7:46:04 -	LMT	1884
 
 # Northwest Territories, Nunavut, Yukon
 
+# From Paul Eggert (2006-03-22):
+# Dawson switched to PST in 1973.  Inuvik switched to MST in 1979.
+# Mathew Englander (1996-10-07) gives the following refs:
+#	* 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68,
+#	c. 7 defines Yukon standard time as UTC-9....
+#	see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1).
+#	[http://canlii.ca/t/7vhg]
+#	* C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00.
+#	* O.I.C. 1980/02 established DST.
+#	* O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00.
+
 # From Brian Inglis (2015-04-14):
 #
 # I tried to trace the history of Yukon time and found the following
@@ -2169,7 +2180,7 @@ Zone America/Inuvik	0	-	zzz	1953 # Inuvik founded
 			-7:00	NT_YK	M%sT	1980
 			-7:00	Canada	M%sT
 Zone America/Whitehorse	-9:00:12 -	LMT	1900 Aug 20
-			-9:00	NT_YK	Y%sT	1966 Jul  1  2:00
+			-9:00	NT_YK	Y%sT	1967 May 28  0:00
 			-8:00	NT_YK	P%sT	1980
 			-8:00	Canada	P%sT
 Zone America/Dawson	-9:17:40 -	LMT	1900 Aug 20
-- 
2.1.0

