diff options
Diffstat (limited to 'northamerica')
| -rw-r--r-- | northamerica | 121 |
1 files changed, 107 insertions, 14 deletions
diff --git a/northamerica b/northamerica index 3e8641e1c20a..3c53eb602ec0 100644 --- a/northamerica +++ b/northamerica @@ -1742,6 +1742,22 @@ Zone America/Toronto -5:17:32 - LMT 1895 # Manitoba +# From Paul Eggert (2026-05-08): +# For 1916 timestamps America/Winnipeg covers only a small region. See: +# Cassidy C. Winnipeg’s 110-year history with daylight time. +# Winnipeg Free Press. 2026-05-06. +# https://www.winnipegfreepress.com/our-communities/correspondents/2026/05/06/winnipegs-110-year-history-with-daylight-time +# Of the 1916 experiment, Cassidy writes: “As rural areas and nearby +# urban centres such as Selkirk and Brandon did not adopt DST, the +# City of Winnipeg essentially had its own time zone.” Cassidy also +# writes that province-wide DST came into effect on 1963-05-12. +# +# Shanks & Pottenger write that Winnipeg did not observe DST in 1964 and 1965. +# Although dubious in the light of Cassidy’s article, we lack a better source. +# Perhaps S&P’s data are for the train stations, not for the city? +# Also, S&P say Manitoba switched at 02:00 (not 02:00s) starting in 1966. +# Since 02:00s is clearly correct for 1967 on, assume 02:00s in 1966 too. + # From Rob Douglas (2006-04-06): # the old Manitoba Time Act - as amended by Bill 2, assented to # March 27, 1987 ... said ... @@ -1756,11 +1772,6 @@ Zone America/Toronto -5:17:32 - LMT 1895 # the 1987 version would apply - the changeover was at 2:00 Central # Standard Time (i.e. not until 3:00 Central Daylight Time). -# From Paul Eggert (2006-04-10): -# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) -# starting 1966. Since 02:00s is clearly correct for 1967 on, assume -# it was also 02:00s in 1966. - # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Winn 1916 only - Apr 23 0:00 1:00 D Rule Winn 1916 only - Sep 17 0:00 0 S @@ -1852,6 +1863,22 @@ Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 # long and rather painful to read. # http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf +# From Heitor David Pinto (2026-05-14): +# In Saskatchewan, a bill was passed to replace the Time Act. It sets UTC-6 all +# year in the whole province, including Lloydminster, but allows the government +# to issue regulations specifying a different time in localities that request +# so: +# https://docs.legassembly.sk.ca/legdocs/Bills/30L2S/Bill30-58.pdf +# The bill ... received royal assent today. +# From Tim Parenti (2026-05-14): +# In light of Alberta joining Saskatchewan on year-round -06, this simplifies +# the prior Act's framework for the many local exceptions to year-round -06 in +# border areas, by extending province-wide the notion of "time option areas" +# which can be prescribed by regulation "if it is in the provincial interest" +# for those areas to observe either "UTC-5, UTC-6 or UTC-7 for all or part of +# the year" on at least 30 days' notice. +# The new Act comes into force by order of the Lieutenant Governor in Council. + # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Regina 1918 only - Apr 14 2:00 1:00 D Rule Regina 1918 only - Oct 27 2:00 0 S @@ -1902,6 +1929,45 @@ Zone America/Swift_Current -7:11:20 - LMT 1905 Sep # Boyer JP. Forcing Choice: The Risky Reward of Referendums. Dundum. 2017. # ISBN 978-1459739123. +# From Roozbeh Pournader (2026-04-20): +# https://calgaryherald.com/opinion/columnists/bell-alberta-daylight-time-year-round-premier-danielle-smith +# +# From Tim Parenti (2026-04-23): +# Section 3 of Bill 31, the Red Tape Reduction Statutes Amendment Act, 2026 +# https://docs.assembly.ab.ca/LADDAR_files/docs/bills/bill/legislature_31/session_2/20251023_bill-031.pdf +# would repeal the Daylight Saving Time Act in the Revised Statutes of Alberta +# 2000 Chapter D-5: +# https://kings-printer.alberta.ca/documents/Acts/D05.pdf +# ...and substitutes a new chapter with language that closely parallels the +# original. The new title is the Official Time Act and will be numbered +# Chapter O-5.7. The Act establishes a standard time of UTC−6 without +# replacing the language previously used to effectuate DST. +# +# From Tim Parenti (2026-06-19): +# After receiving Royal Assent on 2026-05-14, Order in Council 204/2026 was +# issued on 2026-06-18 proclaiming the relevant section of the bill in force on +# the same date. Order in Council 206/2026, issued the same day, uses the +# regulatory authority within the Act to prescribe the official term "Alberta +# Time"; we use the traditional abbreviation CST for consistency. +# https://kings-printer.alberta.ca/Documents/Orders/Orders_in_Council/2026/2026_204.pdf +# https://kings-printer.alberta.ca/Documents/Orders/Orders_in_Council/2026/2026_206.pdf +# +# Since wall clock times do not diverge from past practice until 2026-11-01, +# use that transition date for now to work around potential CLDR limitations in +# the meantime; see British Columbia, below. +# +# From Paul Eggert (2026-07-02): +# The temporary hack for Alberta is needed for CLDR 48.2 (2026-03-17) +# and earlier, not the CLDR 48.1-and-earlier which drives BC’s temporary hack. +# Only a few platforms track minor CLDR releases, though, so the two +# temporary hacks have roughly the same effect in practice. +# +# The term “Alberta Time” is legally prescribed from yesterday until +# 2031-06-30, when the regulation in OiC 206/2026 expires to ensure that the +# term is reviewed by then for relevancy and need. This plan for possible +# obsolescence affects neither timekeeping nor TZDB’s data, which do +# not contain the string “Alberta Time”. + # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D Rule Edm 1918 only - Oct 27 2:00 0 S @@ -1919,7 +1985,11 @@ Rule Edm 1972 2006 - Oct lastSun 2:00 0 S # Zone NAME STDOFF RULES FORMAT [UNTIL] Zone America/Edmonton -7:33:52 - LMT 1906 Sep -7:00 Edm M%sT 1987 - -7:00 Canada M%sT + -7:00 Canada M%sT 2026 Jun 18 + # Temporary hack; see above. + -7:00 1:00 MDT 2026 Nov 1 2:00 + # End of temporary hack. + -6:00 - CST # British Columbia @@ -1962,7 +2032,7 @@ Zone America/Edmonton -7:33:52 - LMT 1906 Sep # on March 8 will be the last time change, ending twice-yearly clock changes.” # https://news.gov.bc.ca/releases/2026AG0013-000209 # -# From Paul Eggert (2026-03-07): +# From Paul Eggert (2026-07-02): # The law says that 21 hours after the usual 2026-03-08 02:00 switch from # PST to PDT, the next day inaugurates the new standard time Pacific Time, # i.e., just one clock change but two name changes separated by 21 hours. @@ -1971,13 +2041,14 @@ Zone America/Edmonton -7:33:52 - LMT 1906 Sep # I asked the BC government for advice, with no response. For now, do this: # 1. As a temporary hack, pretend that the BC law takes effect # not on 2026-03-09 at 00:00, but on 2026-11-01 at 02:00. -# This pretense works around a limitation in CLDR v48.2 (2026-03-17), +# This pretense works around a limitation in CLDR 48.1 (2026-01-08), # which would otherwise say the interval uses “Pacific Standard Time”. # (Below, this temporary hack is marked “Temporary hack; see above.”) # Strictly speaking this hack is incorrect since the interval uses # standard time, but it does have the right UT offset and it # works around the CLDR limitation. We should be able to remove -# the temporary hack after CLDR is fixed. +# the temporary hack by November when there would be little point +# to keeping it anyway. # 2. After the BC law takes effect, model the time as MST sans DST. # We can change this later if another conforming non-numeric abbreviation # for Pacific Time becomes more popular. Possibilities include: @@ -1988,10 +2059,7 @@ Zone America/Edmonton -7:33:52 - LMT 1906 Sep # PST - straightforward but even more confusing, # and will likely break much software that assumes PST is -08 # -07 - accurate and clear in itself, but makes BC look odd vs neighbors -# CPT, CPST - for Canadian Pacific (Standard) Time, -# by analogy with AEST in Australia -# P-T - conforming approximation to “PT” -# PT+ - like P-T but suggesting one-hour advance over PST +# PacT - straightforward but novel abbreviation for Pacific Time # From Chris Walton (2026-03-15): # The Regional District of East Kootenay is planning to move to year-round @@ -2006,6 +2074,10 @@ Zone America/Edmonton -7:33:52 - LMT 1906 Sep # saying, “Pardon the pun, but this is not a time-sensitive issue.” # For now, merely mention the potential change in these comments. # If it happens it would likely affect clocks starting 2027-03-14 at 02:00. +# From Tim Parenti (2026-05-14): +# RDEK has historically been aligned with neighboring Alberta. With the latter +# now opting to stay on -06 year-round, if RDEK does not follow, it would +# require a new zone for the Cranbrook area. # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule Vanc 1918 only - Apr 14 2:00 1:00 D @@ -2022,7 +2094,7 @@ Zone America/Vancouver -8:12:28 - LMT 1884 -8:00 Vanc P%sT 1987 -8:00 Canada P%sT 2026 Mar 9 # Temporary hack; see above. - -8:00 1:00 PDT 2026 Nov 1 02:00 + -8:00 1:00 PDT 2026 Nov 1 2:00 # End of temporary hack. -7:00 - MST Zone America/Dawson_Creek -8:00:56 - LMT 1884 @@ -2350,6 +2422,23 @@ Zone America/Fort_Nelson -8:10:47 - LMT 1884 # about 1970, and uses PST for standard time in Yukon since then. Consistent # with that, use MST for -07, the new standard time in Yukon effective Nov. 1. +# From Tim Parenti (2026-04-21): +# "[Northwest Territories] Premier R.J. Simpson announced Monday that the +# territory will move to end seasonal time changes and will adopt a year-round +# time standard instead. ... Simpson has previously said the territory wouldn't +# end seasonal time changes until Alberta does." +# https://www.cbc.ca/news/canada/north/nwt-ends-daylight-saving-9.7170964 +# +# From Tim Parenti (2026-06-19), per James Bellaire (2026-06-02): +# Much of NWT has, to date, been represented by America/Edmonton, which alias +# America/Yellowknife links to. While Bill 13 (assented to 2021-03-31) would +# enable NWT's proposed change mirroring Alberta's, at time of writing it has +# not yet been formally enacted; if it doesn't move forward as expected, +# America/Yellowknife would need to become its own zone as Alberta has stopped +# changing its clocks. +# If it does go ahead, draft changes to America/Inuvik, which represents the +# remainder of NWT, are commented below. + # Rule NAME FROM TO - IN ON AT SAVE LETTER/S Rule NT_YK 1918 only - Apr 14 2:00 1:00 D Rule NT_YK 1918 only - Oct 27 2:00 0 S @@ -2392,6 +2481,10 @@ Zone America/Inuvik 0 - -00 1953 # Inuvik founded -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 -7:00 NT_YK M%sT 1980 -7:00 Canada M%sT +# Assuming Northwest Territories follows Alberta in abolishing seasonal time +# changes, replace the above line with something like: +# -7:00 Canada M%sT 2026 Nov 1 2:00 +# -6:00 - CST Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 -9:00 NT_YK Y%sT 1965 -9:00 Yukon Y%sT 1966 Feb 27 0:00 |