Atlantic Standard Time (AST)
Atlantic Standard Time (AST) is UTC−4, 4 hours behind UTC. Halifax switches to Atlantic Daylight Time (ADT, UTC−3) for summer (in effect now, until Sun, Nov 1).
Right now in Halifax
4:00 PM
Sat, Oct 17 · ADT (UTC−3)
Cities on Atlantic Standard Time
| City | Time now | Summer time |
|---|---|---|
| Halifax · Canada | 4:00 PM ADT | On it now, until Sun, Nov 1 |
Frequently asked questions about AST
- What is AST (Atlantic Standard Time)?
- Atlantic Standard Time (AST) is UTC−4, 4 hours behind UTC. Halifax switches to Atlantic Daylight Time (ADT, UTC−3) for summer (in effect now, until Sun, Nov 1).
- Which cities use Atlantic Standard Time?
- Cities on Atlantic Standard Time include Halifax (Canada).
- Does Atlantic Standard Time change for daylight saving time?
- Yes. Halifax switches to Atlantic Daylight Time (ADT, UTC−3) for summer (in effect now, until Sun, Nov 1). In Halifax, clocks go back 1 hour on Sun, Nov 1, to AST (UTC−4).
- What is the time difference between AST and UTC?
- AST is 4 hours behind UTC (UTC−4). In summer, places that change their clocks are 3 hours behind UTC.