ADT — Atlantic Daylight Time
ADT is Atlantic Daylight Time, UTC−3. It is the summer time of AST (UTC−4), one hour later. The next ADT period runs from Sunday 14 March 2027 to Sunday 7 November 2027; until then Halifax is on AST.
Right now Halifax is on AST.
| Zones that use ADT in summer | Country | Now | Offset |
|---|---|---|---|
| HalifaxAmerica/Halifax | Canada | 17:40 | UTC−4 AST |
| HamiltonAtlantic/Bermuda | Bermuda | 17:40 | UTC−4 AST |
| ThuleAmerica/Thule | Greenland | 17:40 | UTC−4 AST |
Questions about ADT
- What does ADT stand for?
- ADT stands for Atlantic Daylight Time, UTC−3.
- Is ADT the same as AST?
- No. AST (UTC−4) is the winter time and ADT (UTC−3) the summer time of the same places, one hour apart. The next ADT period runs from Sunday 14 March 2027 to Sunday 7 November 2027; until then Halifax is on AST.
- Is it ADT or AST right now?
- Right now Halifax is on AST (UTC−4).
Convert Atlantic Time (AST/ADT)
These pages follow the summer switch automatically: in summer they show ADT.
- AST → ISTAtlantic Time to India Time
- AST → GMTAtlantic Time to Greenwich Mean Time
- AST → UTCAtlantic Time to Coordinated Universal Time (UTC)
- AST → ESTAtlantic Time to Eastern Time
- AST → CSTAtlantic Time to Central Time
- AST → PSTAtlantic Time to Pacific Time
- AST → CETAtlantic Time to Central European Time
- AST → BSTAtlantic Time to Bangladesh Time
- AEST → ASTAustralian Eastern Time to Atlantic Time
- AST → JSTAtlantic Time to Japan Time
- AST → SGTAtlantic Time to Singapore Time
- AST → GSTAtlantic Time to Gulf Time