Canada covers six time zones — one of the widest spans of any country — stretching from Newfoundland Time in the east to Pacific Time in the west.
Newfoundland Time (NT) is UTC−3:30 standard / UTC−2:30 daylight — one of the few half-hour offsets in the world, used in the province of Newfoundland and Labrador. Atlantic Time (AT) covers Nova Scotia, New Brunswick, PEI, and parts of Quebec — UTC−4 (AST) / UTC−3 (ADT). Eastern Time (ET) covers Ontario and most of Quebec — UTC−5 (EST) / UTC−4 (EDT). Central Time (CT) covers Manitoba and Saskatchewan — UTC−6 (CST). Saskatchewan does not observe DST and stays on CST year-round. Mountain Time (MT) covers Alberta and parts of BC — UTC−7 (MST) / UTC−6 (MDT). Pacific Time (PT) covers British Columbia and most of Yukon — UTC−8 (PST) / UTC−7 (PDT). Yukon switched to permanent MST (UTC−7) in 2020 with no clock changes.
DST in 2025 (for provinces that observe it): clocks spring forward on Sunday 9 March and fall back on Sunday 2 November. Saskatchewan and most of Yukon make no change.
Inter-city gaps during standard time: Toronto to Vancouver = 3 hours. Toronto to Calgary = 2 hours. Toronto to Halifax = 1 hour. Toronto to St. John's = 1.5 hours.