[tz] Fort Nelson, Canada

[Paul Eggert]

Tim Parenti wrote:
> See attached proposed patch to implement a new zone for Fort Nelson.

Thanks, I installed that into the experimental version on github, with some 
minor tweaking of NEWS and one addition: for lack of better info, I followed 
Shanks's assertion that Fort Nelson (unlike Vancouver) did not observe DST in 
1946.  Revised patch attached.

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From aedb557c7034c26480d0fc2755871bd6355ba6e2 Mon Sep 17 00:00:00 2001
From: Tim Parenti <tim at timtimeonline.com>
Date: Wed, 23 Sep 2015 23:00:56 -0700
Subject: [PROPOSED PATCH] Fort Nelson has been on MST since 2015-03-08.

* northamerica (America/Fort_Nelson): New zone.
* zone.tab, zone1970.tab (CA): New zone America/Fort_Nelson.
* NEWS: Document this.
---
 NEWS         |  4 ++++
 northamerica | 22 ++++++++++++++++++++++
 zone.tab     |  1 +
 zone1970.tab |  1 +
 4 files changed, 28 insertions(+)

diff --git a/NEWS b/NEWS
index ead09c5..a3e9e10 100644
--- a/NEWS
+++ b/NEWS
@@ -13,6 +13,10 @@ Unreleased, experimental changes
     Fiji's 2016 fall-back transition is scheduled for January 17, not 24.
     (Thanks to Ken Rylander.)
 
+    Fort Nelson, British Columbia will not fall back on 2015-11-01.  It has
+    effectively been on MST (-0700) since it advanced its clocks on 2015-03-08.
+    New zone America/Fort_Nelson.  (Thanks to Matt Johnson.)
+
   Changes affecting past time stamps
 
     Norfolk observed DST from 1974-10-27 02:00 to 1975-03-02 02:00.
diff --git a/northamerica b/northamerica
index 660a920..7658a45 100644
--- a/northamerica
+++ b/northamerica
@@ -1826,6 +1826,22 @@ Zone America/Edmonton	-7:33:52 -	LMT	1906 Sep
 
 # The transition dates (and times) are guesses.
 
+# From Matt Johnson (2015-09-21):
+# Fort Nelson, BC, Canada will cancel DST this year.  So while previously they
+# were aligned with America/Vancouver, they're now aligned with
+# America/Dawson_Creek.
+# http://www.northernrockies.ca/EN/meta/news/archives/2015/northern-rockies-time-change.html
+#
+# From Tim Parenti (2015-09-23):
+# This requires a new zone for the Northern Rockies Regional Municipality,
+# America/Fort_Nelson.  The resolution of 2014-12-08 was reached following a
+# 2014-11-15 poll with nearly 75% support.  Effectively, the municipality has
+# been on MST (-0700) like Dawson Creek since it advanced its clocks on
+# 2015-03-08.
+#
+# From Paul Eggert (2015-09-23):
+# Shanks says Fort Nelson did not observe DST in 1946, unlike Vancouver.
+
 # 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	27	2:00	0	S
@@ -1844,6 +1860,12 @@ 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/Fort_Nelson	-8:10:47 -	LMT	1884
+			-8:00	Vanc	P%sT	1946
+			-8:00	-	PST	1947
+			-8:00	Vanc	P%sT	1987
+			-8:00	Canada	P%sT	2015 Mar  8  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
diff --git a/zone.tab b/zone.tab
index 381f245..935143f 100644
--- a/zone.tab
+++ b/zone.tab
@@ -129,6 +129,7 @@ CA	+6227-11421	America/Yellowknife	Mountain Time - central Northwest Territories
 CA	+682059-1334300	America/Inuvik	Mountain Time - west Northwest Territories
 CA	+4906-11631	America/Creston	Mountain Standard Time - Creston, British Columbia
 CA	+5946-12014	America/Dawson_Creek	Mountain Standard Time - Dawson Creek & Fort Saint John, British Columbia
+CA	+5848-12242	America/Fort_Nelson	Mountain Standard Time - Fort Nelson, British Columbia
 CA	+4916-12307	America/Vancouver	Pacific Time - west British Columbia
 CA	+6043-13503	America/Whitehorse	Pacific Time - south Yukon
 CA	+6404-13925	America/Dawson	Pacific Time - north Yukon
diff --git a/zone1970.tab b/zone1970.tab
index c9d31d9..1e1b7e7 100644
--- a/zone1970.tab
+++ b/zone1970.tab
@@ -126,6 +126,7 @@ CA	+6227-11421	America/Yellowknife	Mountain Time - central Northwest Territories
 CA	+682059-1334300	America/Inuvik	Mountain Time - west Northwest Territories
 CA	+4906-11631	America/Creston	Mountain Standard Time - Creston, British Columbia
 CA	+5946-12014	America/Dawson_Creek	Mountain Standard Time - Dawson Creek & Fort Saint John, British Columbia
+CA	+5848-12242	America/Fort_Nelson	Mountain Standard Time - Fort Nelson, British Columbia
 CA	+4916-12307	America/Vancouver	Pacific Time - west British Columbia
 CA	+6043-13503	America/Whitehorse	Pacific Time - south Yukon
 CA	+6404-13925	America/Dawson	Pacific Time - north Yukon
-- 
2.1.4