, was the first municipality in the world to enact DST, on July 1, 1908. Five Canadian cities, by local ordinance, used daylight saving time before 1918: Brandon, Manitoba and Winnipeg, Manitoba as well as Halifax, Nova Scotia, Hamilton, Ontario, and Montreal, Quebec. St. John's, Newfoundland, which did not become part of Canada until 1949, also used DST before 1918. In practice, since the late 1960s DST across Canada has been closely or completely synchronized with its observance in the United States to facilitate consistent economic and social interaction. When the United States extended DST in 1987 to the first Sunday in April, all DST-observing Canadian jurisdictions followed suit to mimic the change. The latest United States change, adding parts of March and November starting in 2007, was adopted by the various provinces and territories on the following dates:
Saskatchewan – no official action taken, as most of the province does not change their clocks back in winter, but the small parts that have historically observed DST near Alberta and Manitoba are presumed to be authorized to have the start and end dates the same as Alberta and Manitoba.
By province or territory
British Columbia
Most of British Columbia is on Pacific Time and observes DST. However, there are two main exceptions:
Part of the Peace River Regional District is on Mountain Time and does not observe DST. This means that the region's clocks match those in Calgary and Edmonton in the winter, and they match those in Vancouver in the summer. In 2014, the residents of Fort Nelson voted to stay on year-round MST also, which the community has observed since 2015.
The East Kootenay region in southeastern British Columbia is on Mountain Time and observes DST. This means time in the region always matches that of Calgary; much of the region gets television by way of rebroadcasters of Calgary stations. One exception in this region is Creston, which observes MST year-round. Clocks in Creston match those in Calgary in the winter and Vancouver in the summer.
Nunavut
The territory of Nunavut has three time zones: Mountain Time in the west, Central Time in the centre, and Eastern Time in the east. Daylight saving time is observed throughout Nunavut with the exception of Southampton Island, including Coral Harbour, and Eureka—a permanent research station on Ellesmere Island—both of which remain on Eastern Standard Time throughout the year.
Most of Quebec observes DST. However, the eastern reaches of Quebec's North Shore, east of 63° west longitude, are in the Atlantic Time Zone, but do not observe DST. The effect is that in summer their clocks match those of the rest of the province, while in November, their clocks are rejoined by their Atlantic Standard Time neighbours. Although places east of 63° west are officially on Atlantic Time, local custom is to use Eastern Time as far east as the Natashquan River. Those communities observe DST, including all of Anticosti Island, which is bisected by the 63rd meridian. The Magdalen Islands observe Atlantic Time including DST.
Saskatchewan
Although all of Saskatchewan is geographically within the Mountain Time Zone, the province officially observes the Central Time Zone. As a result, while most of Saskatchewan does not change clocks spring and fall, it technically observes DST year-round. This means that clocks in most of the province match clocks in Winnipeg during the winter and Calgary and Edmonton during the summer. The Saskatchewan Time Act of 1966 designated CST year-round for eastern Saskatchewan and gave local options for western parts of the province. Since 1972, all western regions of the province have opted for CST year-round. The charter of the city of Lloydminster, which is bisected by the Saskatchewan–Alberta boundary, and its immediately surrounding region observe Mountain Time year-round, with officially sanctioned seasonal daylight saving time. This is to keep clocks on the Saskatchewan side in sync with those on the Alberta side; Alberta mandates the use of daylight saving time province-wide. Along the Manitoba border, the small, remote Saskatchewan towns of Denare Beach and Creighton unofficially observe Central Daylight Time during the summer, thereby keeping the same time as larger neighbouring Manitoba communities.
