Creston Central Time Zone Central Standard Time (CST) GMT−06:00 and Central Daylight Time CDT GMT−05:00: Manitoba Saskatchewan Creighton (unofficial) Nunavut between 85° West and 102° West, and Resolute plus all communities in the Kivalliq Region and the west shore of Hudson Bay except Southampton Island (Coral Harbour) Ontario, northwestern west of 90° West (except the Atikokan, New Osnaburgh and Pickle Lake areas, and the Shebandowan and Upsala areas) east of 90° West: Big Trout Lake area Central Standard Time (CST) GMT−06:00 year-round: Saskatchewan (most of the province) (see Lloydminster, and Creighton, above) Eastern Time Zone Eastern Standard Time (EST) GMT−05:00 and Eastern Daylight Time (EDT) GMT−04:00: Nunavut east of 85° West, and all communities in the Qikiqtaaluk Region except Resolute Ontario east of 90° West (except the Big Trout Lake area), plus west of 90° West: Shebandowan and Upsala areas Quebec (most of province) Areas of Labrador adjacent to Schefferville (in Quebec but very close to the Labrador border) observe EST and DST unofficially. Eastern Standard Time (EST) GMT−05:00 year-round: Nunavut entire Southampton Island (Coral Harbour) Ontario west of 90° West: Atikokan area and New Osnaburgh / Pickle Lake area Atlantic Time Zone Atlantic Standard Time (AST) GMT−04:00 and Atlantic Daylight Time (ADT) GMT−03:00: Labrador (all but the southeastern tip) New Brunswick Nova Scotia Prince Edward Island Quebec (Magdalen Islands and Listuguj Mi'gmaq First Nation) Atlantic Standard Time (AST) UTC−04:00 year-round: Quebec (east of the Natashquan River) Newfoundland Time Zone Newfoundland Standard Time (NST) GMT−03:30 and Newfoundland Daylight Time (NDT) GMT−02:30: Labrador (southeastern) Newfoundland Former time zones The Yukon Time Zone (GMT−09:00) covered Yukon from 1900 until 1966. In 1983, the zone (then covering only a small portion of Alaska) was restructured to cover most of Alaska and renamed the Alaska Time Zone. In 1988, Newfoundland observed "double daylight saving time" from April 3 until October 30, meaning that the time was set ahead by 2 hours. All of Newfoundland and southern Labrador, which observes GMT−03:30 as its standard time zone, observed GMT−01:30. This only happened in 1988 and the province now only adjusts its time by one hour for daylight saving time. Daylight saving time Four Canadian cities, by local ordinance, observed daylight saving time in 1916. Brandon, Manitoba, adopted it on April 17. It was followed by Winnipeg on April 23, Halifax on April 30, and Hamilton, Ontario, on June 4. Port Arthur, Ontario, was the first place