<P> Most of Ontario uses DST . Pickle Lake, Atikokan and New Osnaburgh, three communities located within the Central Time Zone in northwestern Ontario, observe Eastern Standard Time all year long . </P> <P> 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 (see exception, below). 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 . </P> <P> The Magdalen Islands observe Atlantic Time including DST . </P> <P> Although the entire province is geographically within the MST (UTC - 7) zone, the province is officially part of the Central time zone (UTC - 6). 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 . This time zone designation was implemented in 1966, when the Saskatchewan Time Act was passed in order to standardize time province - wide . </P>

When does bc go to daylight savings time