--- old/make/data/tzdata/northamerica 2014-10-28 14:13:54.105389434 +0300 +++ new/make/data/tzdata/northamerica 2014-10-28 14:13:53.977389439 +0300 @@ -300,6 +300,12 @@ # time zone, but we do go by the Eastern time zone because so many people work # in Columbus." +# From Paul Eggert (2014-09-06): +# Monthly Notices of the Royal Astronomical Society 44, 4 (1884-02-08), 208 +# says that New York City Hall time was 3 minutes 58.4 seconds fast of +# Eastern time (i.e., -4:56:01.6) just before the 1883 switch. Round to the +# nearest second. + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER Rule NYC 1920 only - Mar lastSun 2:00 1:00 D Rule NYC 1920 only - Oct lastSun 2:00 0 S @@ -1118,17 +1124,16 @@ # An amendment to the Interpretation Act was registered on February 19/2007.... # http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf -# From Paul Eggert (2006-04-25): +# From Paul Eggert (2014-10-18): # H. David Matthews and Mary Vincent's map # "It's about TIME", _Canadian Geographic_ (September-October 1998) -# http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp +# http://www.canadiangeographic.ca/Magazine/SO98/alacarte.asp # contains detailed boundaries for regions observing nonstandard # time and daylight saving time arrangements in Canada circa 1998. # -# INMS, the Institute for National Measurement Standards in Ottawa, has -# information about standard and daylight saving time zones in Canada. -# http://inms-ienm.nrc-cnrc.gc.ca/en/time_services/daylight_saving_e.php -# (updated periodically). +# National Research Council Canada maintains info about time zones and DST. +# http://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html +# http://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5 # Its unofficial information is often taken from Matthews and Vincent. # From Paul Eggert (2006-06-27): @@ -1993,10 +1998,7 @@ # [Also see (2001-03-09).] # From Gwillim Law (2005-05-21): -# According to maps at -# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SWE.jpg -# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SSE.jpg -# (both dated 2003), and +# According to ... # http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp # (from a 1998 Canadian Geographic article), the de facto and de jure time # for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year @@ -2005,9 +2007,11 @@ # predates the creation of Nunavut, it probably goes back many years.... # The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. # -# From Paul Eggert (2005-07-26): +# From Paul Eggert (2014-10-17): # For lack of better information, assume that Southampton Island observed -# daylight saving only during wartime. +# daylight saving only during wartime. Gwillim Law's email also +# mentioned maps now maintained by National Research Council Canada; +# see above for an up-to-date link. # From Chris Walton (2007-03-01): # ... the community of Resolute (located on Cornwallis Island in @@ -3008,10 +3012,21 @@ # Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an # unspecified official document, and says "This time is used throughout the # island". Go with Milne. Round to the nearest second as required by zic. +# +# Shanks & Pottenger give April 28 for the 1974 spring-forward transition, but +# Lance Neita writes that Prime Minister Michael Manley decreed it January 5. +# Assume Neita meant Jan 6 02:00, the same as the US. Neita also writes that +# Manley's supporters associated this act with Manley's nickname "Joshua" +# (recall that in the Bible the sun stood still at Joshua's request), +# and with the Rod of Correction which Manley said he had received from +# Haile Selassie, Emperor of Ethiopia. See: +# Neita L. The politician in all of us. Jamaica Observer 2014-09-20 +# http://www.jamaicaobserver.com/columns/The-politician-in-all-of-us_17573647 +# # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Jamaica -5:07:11 - LMT 1890 # Kingston -5:07:11 - KMT 1912 Feb # Kingston Mean Time - -5:00 - EST 1974 Apr 28 2:00 + -5:00 - EST 1974 -5:00 US E%sT 1984 -5:00 - EST