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AST — Atlantic Standard Time
UTC-04:00 · North America
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AbbreviationAST
Full nameAtlantic Standard Time
UTC offsetUTC-04:00
RegionNorth America
About AST
AST stands for Atlantic Standard Time, a time zone at UTC-04:00 — that is, 4 hours behind Coordinated Universal Time. The live clock above shows the current time at this fixed offset.
AST is not a unique identifier. The same letters are also used for Arabia Standard Time (UTC+03:00). Abbreviations like this are ambiguous by design — when it matters, use the full name, the UTC offset, or an IANA zone id (e.g. "America/Chicago") instead.
To convert AST to your own time zone, use the time zone converter, compare it against any city on the world clock, or see every time zone abbreviation in one place.