What time is it in Atlantic Time (AST / ADT)?
The time above updates live from your browser. It uses the IANA zone America/Halifax, which automatically switches between AST (UTC−4) and ADT (UTC−3).
whatweek.ca
See what week of the year it is right now in Canada, including the current week number and the dates this week starts and ends.
Atlantic Time (AST / ADT)
Live time, week numbers, and provincial coverage for Atlantic Time (AST / ADT) in Canada.
Current time
04:24:32
Tuesday, May 12, 2026
Current offset: UTC−3
This week
- ISO week: 20 · 2026 · view the week →
- Canadian week (Sun–Sat): 20
- From Monday, May 11, 2026 to Sunday, May 17, 2026
About this time zone
- IANA ID:
America/Halifax - Standard time: AST (UTC−4)
- Daylight time: ADT (UTC−3)
- Regions: Nova Scotia · New Brunswick · Prince Edward Island · most of Labrador
Other Canadian time zones
Frequently asked questions
What week number is it in Atlantic Time (AST / ADT)?
Today is ISO week 20 of 2026 and Canadian week 20 (Sunday–Saturday).
Which provinces use Atlantic Time (AST / ADT)?
Nova Scotia · New Brunswick · Prince Edward Island · most of Labrador
Is there daylight saving time?
Yes for most of Canada — begins on the second Sunday of March and ends on the first Sunday of November. Exceptions: most of Saskatchewan, Yukon, and parts of Nunavut and British Columbia stay on standard time year-round.