What is AST?
Atlantic Standard Time / Arabia Standard Time — UTC-4
About the AST Timezone
AbbreviationAST
Full nameAtlantic Standard Time / Arabia Standard Time
UTC offsetUTC-4
Daylight saving (DST)No
⚠️ The abbreviation "AST" is shared by more than one timezone. Make sure you know which one is intended in your context.
Cities in the AST Timezone
Santo Domingo
Dominican Republic
UTC-4
Halifax
Canada
UTC-4
San Juan
Puerto Rico
UTC-4
Bridgetown
Barbados
UTC-4
Port of Spain
Trinidad and Tobago
UTC-4
Hamilton
Bermuda
UTC-4
Willemstad
Curaçao
UTC-4
Oranjestad
Aruba
UTC-4
Montego Bay
Jamaica
UTC-5
Castries
Saint Lucia
UTC-4
and 21 more cities…
Frequently Asked Questions
What timezone is AST?
AST stands for Atlantic Standard Time / Arabia Standard Time. The standard UTC offset is UTC-4. Note that AST is a shared abbreviation used by more than one timezone.
What cities and countries use AST?
Cities in the AST timezone include: Santo Domingo, Halifax, San Juan, Bridgetown, Port of Spain, Hamilton, Willemstad, Oranjestad. Countries: Dominican Republic, Canada, Puerto Rico, Barbados, Trinidad and Tobago, Bermuda, Curaçao, Aruba.
Does AST observe daylight saving time (DST)?
No, AST (Atlantic Standard Time) does not observe daylight saving time. The offset stays UTC-4 year-round.
What is the UTC offset of AST?
The standard UTC offset for AST is UTC-4.
How do I convert AST to my local time?
To convert AST to your local time, find your timezone's UTC offset and calculate the difference from UTC-4 (AST's UTC offset). Use our timezone converter for automatic calculations.