Canada Time Zones

What are Canada’s time zones?

Canada has six primary time zones. From west to east, they are:

This page also shows common year-round exceptions as separate cards: Blanc Sablon, Quebec (AST year-round), Southampton Island, Nunavut (EST year-round), Regina (CST year-round), and Whitehorse (MST year-round).

In total this page shows 10 live clocks: the six primary zones above plus those four year-round exception cards.

The map near the top of this page is a static color-coded image of Canada’s time zones. It is not an interactive or region-by-region boundary tool.

A few geographic notes: Atlantic Time covers Nova Scotia, New Brunswick, Prince Edward Island, and most of Labrador. Eastern Time covers most of Ontario and Québec, plus eastern Nunavut communities such as Iqaluit. Central Time covers Manitoba, parts of Nunavut, and portions of northwestern Ontario. Mountain Time covers Alberta, most of the Northwest Territories, and western Nunavut. Pacific Time covers most of British Columbia. Lloydminster straddles the Alberta–Saskatchewan border; the entire city follows common Mountain Time schedule with daylight saving, including the Saskatchewan side.

How does Daylight Saving Time work in Canada?

Most of Canada observes Daylight Saving Time. Where DST applies, clocks spring forward one hour on the second Sunday in March at 2:00 a.m. local time and fall back one hour on the first Sunday in November at 2:00 a.m. local time. This schedule is aligned with the DST schedule used in most of the United State.

During Daylight Saving Time, time-zone abbreviations typically change from Standard (“S”) to Daylight (“D”) —such as, EST becomes EDT, and PST becomes PDT. Newfoundland follows the same DST transition dates as most of Canada, and its time remains 30 minutes ahead of Atlantic Time year-roun.

Not every place changes clocks. Common year-round exceptions shown on this page include Regina (CST year-round), Whitehorse (MST year-round), Blanc Sablon, Quebec (AST year-round), and Southampton Island, Nunavut (EST year-round). Because those places stay put while Eastern Time shifts, their difference versus Ottawa changes when the rest of the country enters or leaves DST.

What is the time difference between Canada’s time zones?

Relative to Ottawa (Eastern Time), the usual gaps are:

• Pacific: 3 hours behind (Vancouver).
• Mountain: 2 hours behind (Edmonton).
• Central: 1 hour behind (Winnipeg).
• Atlantic: 1 hour ahead (Halifax).
• Newfoundland: 1.5 hours ahead (St. John’s)—30 minutes ahead of Atlantic Time.

Those gaps hold when both places follow the same DST rules. Year-round places such as Regina, Whitehorse, and Blanc Sablon do not change clocks, so their difference versus Ottawa shifts when Eastern Time enters or leaves Daylight Saving Time. Halifax to Vancouver stays four hours year-round when both follow the same seasonal rules (AST versus PST in winter; ADT versus PDT in summer).

For times outside Canada, use Canada ↔ United States above to line up Seattle, Denver, Chicago, and New York next to Canadian zones (the board converts against Ottawa). You can also convert common U.S. border pairs with PST to EST, open the U.S. time zones map, read Canada time zones explained for provincial exceptions, or plan several cities in the World Meeting Planner.

What time zone is Ottawa in?

Ottawa is Eastern Time (America/Toronto). In winter that is EST (UTC−05:00); when Daylight Saving Time is in EDT (UTC−04:00). On this page, the Eastern Time uses Ottawa as the example city, so the capital’s local time is the Eastern clock above.

How do Canada’s time zones relate to U.S. time zones?

Canada and the United States share the same North American time-zone “backbone.” Both countries inherited standard time from the railroad era, and from west to east the main names line up: Pacific, Mountain, Central, and Eastern, with matching UTC baselines. That is why many border corridors stay on the same clock—for example, Vancouver with Seattle, Toronto with New York, or Windsor with Detroit.

Daylight Saving Time is part of that shared system too. Most of Canada changes clocks on the same weekends as much of the United States. Keeping those dates aligned helps meetings, flights, TV schedules, and cross-border business avoid a one-hour mismatch.

The differences matter as well. U.S. zone boundaries are mainly set at the federal level (the Department of Transportation), while Canada leaves standard time and DST largely to the provinces and territories. Canada also has Newfoundland Time, a half-hour offset with no direct match among the U.S. primary zones, and more local year-round exceptions (such as Regina, Whitehorse, Blanc Sablon, and Southampton Island on this page). For the U.S. side of the map, see our U.S. time zone page.

Why does Canada have so many time zones?

Canada stretches a long way from British Columbia to Newfoundland and Labrador—several hours of clock difference coast to coast. A single national time zone would cause local clock time to differ substantially from local solar time across much of the country. Multiple time zones keep local clocks closer to sunrise and sunset, which makes work, school, travel, and daily life more practical.

Canada also has a half-hour zone: Newfoundland Time (UTC−03:30 / UTC−02:30). That is why St. John’s does not line up on the hour with Halifax or Ottawa. Other large countries use multiple zones for the same reason, including the United States.

Who sets Canada’s time zones?

In Canada, standard time and Daylight Saving Time are mainly set by the provinces and territories, Each province or territory decides which offset applies and whether clocks change with the seasons.

The National Research Council of Canada maintains official time signals, but the legal time is established provincial and territorial rules. That is why some places—such as most of Saskatchewan, Yukon, and Blanc Sablon—do not follow the same DST practices as their neighbors.

A brief history of Canada’s time zones

Canada adopted railway standard time in the late nineteenth century as part of a coordinated North American time-zone system, which is why the Pacific, Mountain, Central, and Eastern time zones generally align across the Canada–U.S. border. Provinces and territories later set their own DST rules, creating today’s mix of shared North American change dates and local year-round exceptions.

Newfoundland’s half-hour offset is a long-standing feature of Canadian timekeeping. Places such as Saskatchewan (most of the province), Yukon, and Blanc Sablon have also chosen fixed offsets so they do not spring forward with their neighbors.

Where does this page get its time data?

The clocks and zone labels on this page follow the IANA Time Zone Database (for example America/Vancouver, America/Edmonton, America/Winnipeg, America/Toronto, America/Halifax, America/St_Johns). Most Canadian zones on this page observe Daylight Saving Time; notable year-round exceptions include Regina (CST year-round), Whitehorse (UTC−7 year-round), Blanc-Sablon (AST year-round), and Southampton Island (EST year-round). For a broader overview, see Time in Canada (opens in new tab).