24TimeZones.com Time zone abbreviations Atlantic Time

Atlantic Time

Atlantic Time


Sunday, September 24, 2023

Atlantic Time (AT) is a term which refers to the local time in areas observing either Atlantic Standard Time (AST) or Atlantic Daylight Time (ADT).

What time is it Atlantic Time?

Atlantic Time Zone GMT/UTC offset

Atlantic Standard Time is 4 hours behind Coordinated Universal Time (UTC).

Atlantic Daylight Time is 3 hours behind UTC.


Time zone difference

Time zone Difference
Atlantic Time to Eastern Time 1 hour ahead of Eastern Time
Atlantic Time to Central Time 2 hours ahead of Central Time
Atlantic Time to Mountain Time 3 hours ahead of Mountain Time
Atlantic Time to Pacific Time 4 hours ahead of Pacific Time


Abbreviation Name
AT Atlantic Time
AST Atlantic Standard Time
ADT Atlantic Daylight Time

Daylight Saving Time in 2023

DST starts on Sunday 12 March 2023, 02:00 standard time
Move your clock forward 1 hour
DST ends on Sunday 05 November 2023, 02:00 daylight time
Move your clock back 1 hour


Iana Timezones where AT is currently observed

America/Anguilla America/Antigua
America/Aruba America/Barbados
America/Blanc-Sablon America/Curacao
America/Dominica America/Grenada
America/Guadeloupe America/Kralendijk
America/Lower_Princes America/Marigot
America/Martinique America/Montserrat
America/Port_of_Spain America/Puerto_Rico
America/St_Barthelemy America/St_Kitts
America/St_Lucia America/St_Thomas
America/St_Vincent America/Tortola

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