AST — Atlantic Standard Time (UTC−4)
2:27:20AM
AST (Atlantic Standard Time) is 4 hours behind Coordinated Universal Time (UTC−4). During daylight saving time, places that use AST switch to ADT (UTC−3).
Halifax currently uses AST. See the current time in Halifax.
Arabia Standard Time (UTC+3) is also abbreviated AST.
Convert AST time
Live- AST2:27 AMThu, Nov 5
- Your time6:27 AMThu, Nov 5
Thursday, November 5, 2026
About AST
- Abbreviation
- AST
- Full name
- Atlantic Standard Time
- UTC offset
- UTC−4
- Type
- Standard time; summer time is ADT
- Example location
- Halifax
Where AST is used
- Atlantic Canada (winter)
- Puerto Rico
- Dominican Republic
- Eastern Caribbean