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Improve comments for Halifax and Glace Bay

(Thanks to Brian Inglis.)
* NEWS, northamerica (Halifax): Document this.
* zone.tab, zone1970.tab:
Improve comments for America/Halifax and America/Glace_Bay.
Paul Eggert %!s(int64=10) %!d(string=hai) anos
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a86ca0f413
Modificáronse 4 ficheiros con 18 adicións e 6 borrados
  1. 3 0
      NEWS
  2. 11 2
      northamerica
  3. 2 2
      zone.tab
  4. 2 2
      zone1970.tab

+ 3 - 0
NEWS

@@ -32,6 +32,9 @@ Unreleased, experimental changes
 
   Changes affecting installed data files
 
+    Comments for America/Halifax and America/Glace_Bay have been improved.
+    (Thanks to Brian Inglis.)
+
     Data entries have been simplified for Atlantic/Canary, Europe/Simferopol,
     Europe/Sofia, and Europe/Tallinn.  This yields slightly smaller
     installed data files for Europe/Simferopol and Europe/Tallinn.

+ 11 - 2
northamerica

@@ -1235,10 +1235,19 @@ Zone America/Goose_Bay	-4:01:40 -	LMT	1884 # Happy Valley-Goose Bay
 
 # west Labrador, Nova Scotia, Prince Edward I
 
-# From Paul Eggert (2006-03-22):
+# From Brian Inglis (2015-07-20):
+# From the historical weather station records available at:
+# https://weatherspark.com/history/28351/1971/Sydney-Nova-Scotia-Canada
+# Sydney shares the same time history as Glace Bay, so was
+# likely to be the same across the island....
+# Sydney, as the capital and most populous location, or Cape Breton, would
+# have been better names for the zone had we known this in 1996.
+
+# From Paul Eggert (2015-07-20):
 # Shanks & Pottenger write that since 1970 most of this region has been like
 # Halifax.  Many locales did not observe peacetime DST until 1972;
-# Glace Bay, NS is the largest that we know of.
+# the Cape Breton area, represented by Glace Bay, is the largest we know of
+# (Glace Bay was perhaps not the best name choice but no point changing now).
 # Shanks & Pottenger also write that Liverpool, NS was the only town
 # in Canada to observe DST in 1971 but not 1970; for now we'll assume
 # this is a typo.

+ 2 - 2
zone.tab

@@ -106,8 +106,8 @@ BW	-2439+02555	Africa/Gaborone
 BY	+5354+02734	Europe/Minsk
 BZ	+1730-08812	America/Belize
 CA	+4734-05243	America/St_Johns	Newfoundland Time, including SE Labrador
-CA	+4439-06336	America/Halifax	Atlantic Time - Nova Scotia (most places), PEI
-CA	+4612-05957	America/Glace_Bay	Atlantic Time - Nova Scotia - places that did not observe DST 1966-1971
+CA	+4439-06336	America/Halifax	Atlantic Time - Nova Scotia (peninsula), PEI
+CA	+4612-05957	America/Glace_Bay	Atlantic Time - Nova Scotia (Cape Breton)
 CA	+4606-06447	America/Moncton	Atlantic Time - New Brunswick
 CA	+5320-06025	America/Goose_Bay	Atlantic Time - Labrador - most locations
 CA	+5125-05707	America/Blanc-Sablon	Atlantic Standard Time - Quebec - Lower North Shore

+ 2 - 2
zone1970.tab

@@ -103,8 +103,8 @@ BT	+2728+08939	Asia/Thimphu
 BY	+5354+02734	Europe/Minsk
 BZ	+1730-08812	America/Belize
 CA	+4734-05243	America/St_Johns	Newfoundland Time, including SE Labrador
-CA	+4439-06336	America/Halifax	Atlantic Time - Nova Scotia (most places), PEI
-CA	+4612-05957	America/Glace_Bay	Atlantic Time - Nova Scotia - places that did not observe DST 1966-1971
+CA	+4439-06336	America/Halifax	Atlantic Time - Nova Scotia (peninsula), PEI
+CA	+4612-05957	America/Glace_Bay	Atlantic Time - Nova Scotia (Cape Breton)
 CA	+4606-06447	America/Moncton	Atlantic Time - New Brunswick
 CA	+5320-06025	America/Goose_Bay	Atlantic Time - Labrador - most locations
 CA	+5125-05707	America/Blanc-Sablon	Atlantic Standard Time - Quebec - Lower North Shore