| Canadian Time Zone History | ||
|---|---|---|
| America/Winnipeg (MB, west ON)
-6:28:36 - LMT 1887 Jul 16 -6:00 Winn C%sT 2006 -6:00 Canada C%sT America/Toronto (ON, QC) -5:17:32 - LMT 1895 -5:00 Canada E%sT 1919 -5:00 Toronto E%sT 1942 Feb 9 2:00s -5:00 Canada E%sT 1946 -5:00 Toronto E%sT 1974 -5:00 Canada E%sT America/Moncton (NB) -4:19:08 - LMT 1883 Dec 9 -5:00 - EST 1902 Jun 15 -4:00 Canada A%sT 1933 -4:00 Moncton A%sT 1942 -4:00 Canada A%sT 1946 -4:00 Moncton A%sT 1973 -4:00 Canada A%sT 1993 -4:00 Moncton A%sT 2007 -4:00 Canada A%sT America/Halifax (NS, PEI) -4:14:24 - LMT 1902 Jun 15 -4:00 Halifax A%sT 1942 Feb 9 2:00s -4:00 Canada A%sT 1946 -4:00 Halifax A%sT 1974 -4:00 Canada A%sT America/Glace_Bay (No DST 54-72) -3:59:48 - LMT 1902 Jun 15 -4:00 Canada A%sT 1953 -4:00 Halifax A%sT 1954 -4:00 - AST 1972 -4:00 Halifax A%sT 1974 -4:00 Canada A%sT America/St_Johns (NL) -3:30:52 - LMT 1884 -3:30:52 StJ N%sT 1935 Mar 30 -3:30 StJohns N%sT 1942 May 11 -3:30 Canada N%sT 1946 -3:30 StJohns N%sT 2011 Nov America/Goose_Bay (NL) -4:01:40 - LMT 1884 # Happy Valley -3:30:52 - NST 1935 Mar 30 -3:30 - NST 1936 -3:30 StJohns N%sT 1942 May 11 -3:30 Canada N%sT 1946 -3:30 StJohns N%sT 1966 Mar 15 2:00 America/Cambridge_Bay (NT>NU) 1920 -7:00 NT_YK C%sT 1999 Oct 31 2:00 America/Resolute (NT>NU) 1947 Aug 31 -6:00 NT_YK C%sT 2000 Oct 29 2:00 America/Rankin_Inlet (NT>NU) 1957 -6:00 NT_YK C%sT 2000 Oct 29 2:00 America/Iqaluit (NT>NU) 1942 Aug -5:00 NT_YK E%sT 1999 Oct 31 2:00 See below for additional cities | Original Canadian Time Zones generally based on "mean solar time". Exact boundries not available. Time shown is based on reference cities within each zone. 
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| Creston BC (marked -7 above) follows America/Phoenix (UTC-07 no DST)
Southampton Island NU follows America/Panama (UTC-05 no DST) Western Labrador follows America/Halifax (UTC-04 w/DST) Eastern Quebec follows America/Puerto_Rico (UTC-04 no DST) | ||
| Net of changes prior to 1960 Exact boundries not available. Time shown is based on reference cities within each zone. 
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| America/Regina (SK)
-6:58:36 - LMT 1905 Sep -7:00 Regina M%sT 1960 Apr lastSun 2:00 -6:00 - CST # PERMANENT DST -06 America/Swift_Current (west SK) -7:11:20 - LMT 1905 Sep -7:00 Canada M%sT 1946 Apr lastSun 2:00 -7:00 Regina M%sT 1950 -7:00 Swift M%sT 1972 Apr lastSun 2:00 # Split from America/Regina in 1950 # Swift Current not mapped | 1960 - Saskatchewan moves from MST/MDT (UTC-07 / UTC-06) to CST (UTC-06)
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| America/Dawson (north YT)
-9:17:40 - LMT 1900 Aug 20 -9:00 NT_YK Y%sT 1965 -9:00 Yukon Y%sT 1973 Oct 28 0:00 America/Whitehorse (YT) -9:00:12 - LMT 1900 Aug 20 -9:00 NT_YK Y%sT 1965 -9:00 Yukon Y%sT 1966 Feb 27 0:00 -8:00 - PST 1980 # PERMANENT DST -08 America/St_Johns -3:30 StJohns N%sT 2011 Nov -3:30 Canada N%sT America/Goose_Bay -3:30 StJohns N%sT 1966 Mar 15 2:00 -4:00 StJohns A%sT 2011 Nov -4:00 Canada A%sT | 1966 - Whitehorse Yukon moves from YST/YDT (UTC-09 / UTC-08) to PST (UTC-08)
1966 - Labrador observes AST/ADT (UTC-04 / UTC-03) instead of Newfoundland Time 
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| America/Adak
-11:00 - NST 1967 Apr -11:00 - BST 1969 -11:00 US B%sT 1983 Oct 30 2:00 America/Nome -11:00 - NST 1967 Apr -11:00 - BST 1969 -11:00 US B%sT 1983 Oct 30 2:00 America/Anchorage -10:00 - AHST 1969 -10:00 US AH%sT 1983 Oct 30 2:00 America/Yakutat -9:00 - YST 1969 -9:00 US Y%sT 1983 Nov 30 America/Sitka -8:00 - PST 1969 -8:00 US P%sT 1983 Oct 30 2:00 America/Juneau -8:00 - PST 1969 -8:00 US P%sT 1980 Apr 27 2:00 America/Metlakata -8:00 - PST 1969 -8:00 US P%sT 1983 Oct 30 2:00 | 1969 - Alaska adopts DST
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| 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 # Split from America/Vancouver in 1972 # PERMANENT DST -07 America/Swift_Current -7:00 Swift M%sT 1972 Apr lastSun 2:00 -6:00 - CST # PERMANENT DST -06 | 1972 - Dawson Creek BC moves from PST/PDT (UTC-08 / UTC-07) to MST (UTC-07)
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| America/Dawson
-9:00 Yukon Y%sT 1973 Oct 28 0:00 -8:00 - PST 1980 # PERMANENT DST -08 America/Whitehorse -8:00 - PST 1980 | 1973 - Northern Yukon moves from YST/YDT (UTC-09 / UTC-08) to PST (UTC-08)
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| America/Inuvik (NT)
1953 # Founded -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 -7:00 NT_YK M%sT 1980 -7:00 Canada M%sT America/Yellowknife (NT) 1935 # Founded? -7:00 NT_YK M%sT 1980 -7:00 Canada M%sT # backdata | 1979 - Western Northwest Territories moves from PST/PDT to MST/MDT
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| America/Dawson
-8:00 - PST 1980 -8:00 Canada P%sT 2020 Nov 1 America/Whitehorse -8:00 - PST 1980 -8:00 Canada P%sT 2020 Nov 1 America/Adak -11:00 US B%sT 1983 Oct 30 2:00 -10:00 US AH%sT 1983 Nov 30 -10:00 US H%sT America/Nome -11:00 US B%sT 1983 Oct 30 2:00 America/Anchorage -10:00 US AH%sT 1983 Oct 30 2:00 America/Yakutat -9:00 US Y%sT 1983 Nov 30 America/Sitka -8:00 US P%sT 1983 Oct 30 2:00 America/Juneau -8:00 US P%sT 1980 Apr 27 2:00 -9:00 US Y%sT 1980 Oct 26 2:00 -8:00 US P%sT 1983 Oct 30 2:00 # Alaska Standard Time (AKST / AKDT) -9:00 US Y%sT 1983 Nov 30 -9:00 US AK%sT | 1980 - Yukon moves from PST (UTC-08) to PST/PDT (UTC-08 / UTC-07)
1983 - Alaska combines time zones 
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| 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 # Split from America/Vancouver in 2015 # PERMANENT DST -07 | 2015 - Fort Nelson BC moves from PST/PDT (UTC-08 / UTC-07) to MST (UTC-07)
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| America/Dawson
-8:00 Canada P%sT 2020 Nov 1 -7:00 - MST # PERMANENT DST -07 America/Whitehorse -8:00 Canada P%sT 2020 Nov 1 -7:00 - MST # PERMANENT DST -07 | 2020 - Yukon moves from PST/PDT (UTC-08 / UTC-07) to MST (UTC-07)
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| America/Vancouver (BC)
-8:12:28 - LMT 1884 -8:00 Vanc P%sT 1987 -8:00 Canada P%sT 2026 Mar 9 -8:00 1:00 PDT 2026 Nov 1 2:00 -7:00 - MST # PERMANENT DST -07 America/Edmonton (AB) -7:33:52 - LMT 1906 Sep -7:00 Edm M%sT 1987 -7:00 Canada M%sT 2026 Nov 1 2:00 !! -6:00 - CST # PERMANENT DST -06 America/Inuvik -7:00 Canada M%sT 2026 Nov 1 2:00 !! -6:00 - CST # PERMANENT DST -06 America/Cambridge_Bay -7:00 Canada M%sT 2026 Nov 1 2:00 !! -6:00 - CST # PERMANENT DST -06 | 2026 - British Columbia moves from PST/PDT (UTC-08 / UTC-07) to MST (UTC-07)
Alberta, Northwest Territories, Cambridge Bay (Nunavut) and Regional District of East Kootenay BC move from MST/MDT (UTC-07 / UTC-06) to CST (UTC-06) 
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| Recent Changes / Proposals British Columbia - Proclaimed permanent DST (UTC-07) called "Pacific Time" effective March 9th, 2026. (Legislation: Bill 40 - Interpretation Amendment Act, 2019 and B.C. Regulation 20/2026) Alberta - Legislation passed and received royal assent May 14th, 2026, for permanent DST (UTC-06). (Legislation: Bill 31 - Red Tape Reduction Statutes Amendment Act, 2026 [PDF pg.17] awaiting proclaimation) RDEK BC - Announced as UTC-07 March 13th then withdrawn pending regional survey. RDEK currently follows Alberta time. Northwest Territories - Legislation passed and received royal assent March 31, 2021, for a public engagement to select a time zone. (Legislation: Bill 13 - An Act to Amend the Interpretation Act and What We Heard Report) As of April 20, 2026, NWT is beginning the planning to ensure a smooth transition. (Source: CBC News) Nunavut Territories - Action is needed to allow Cambridge Bay to follow permanent DST (UTC-06). As of May 28, 2026, Nunavut is exploring the possibility of ending seasonal time changes across all of Nunavut. (Source: Nunatsiaq News) Future Changes Nunavik Quebec - As of November 2025, Makivvik (the legal representative for Inuit in Nunavik) says the region will stay on permanent daylight saving time (UTC-04) starting in 2026. (Source: CBC News) As part of the Quebec provence the provincial government officially controls the time zone in Nunavit. Manitoba - An act received royal assent May 30, 2023, allowing Manitoba to move to "Manitoba Time (MBT)" (UTC-05) upon proclaimation. (Legislation: The Official Time Amendment Act, SM 2023) The intent was to proclaim the change in coordination with neighboring territories and provences and US states. Attempts to modify the act to take effect on a given date without proclamation have not been successful. Current leadership is revisiting the act, potentially moving to permanent CST (UTC-06) to create a "Prairie Time Zone" with Saskatchewan and Alberta. A public engagement is underway. (News Release: Manitobans invited to share views on seasonal time change) Ontario - The "Time Amendment Act, 2020" provides for permanent DST (UTC-05 west of 90 W longitude, UTC-04 east of 90 W longitude). Effective when coordinated with Quebec and New York State. (Legislation: Time Act (with Amendment) - Ontario e-Laws and Bill 214 - Legislative Assembly of Ontario) Quebec - The "Legal Time Act" has not been amended to change to permanent DST. There is also no legislation pending in New Brunswick, Nova Scotia, Prince Edward Island or Newfoundland and Labrador. | ||
