AST(Atlantic Standard Time)
Atlantic Standard Time (AST) is the standard time of Atlantic Canada and the eastern Caribbean, four hours behind UTC.
- UTC offset
- UTC−04:00
- Abbreviation
- AST
- Full name
- Atlantic Standard Time
- Military letter
- Quebec (Q)
- Regions
- Atlantic Canada, Eastern Caribbean, Puerto Rico
- IANA zones
- America/Halifax, America/Puerto_Rico, America/Santo_Domingo, America/Barbados
- Converter model
- Fixed offset.
What AST means
AST is the standard time of Nova Scotia, New Brunswick, Prince Edward Island and much of the eastern Caribbean, including Puerto Rico and the Dominican Republic.
- Newfoundland sits half an hour further east again, on an offset of UTC−03:30, and is not covered by AST.
Cities on this offset
These cities keep UTC−04:00 as their standard offset:
- Halifax
- Moncton
- San Juan
- Santo Domingo
- Bridgetown
Other meanings of AST
AST is used for more than one time zone. This page describes Atlantic Standard Time; the other meanings have their own pages and their own offsets:
- AST — Arabia Standard Time (UTC+03:00)
History
Atlantic time was defined as the North American zone east of Eastern time, covering the maritime provinces and the islands beyond them.