What is Atlantic Standard Time?
You need to keep in mind that this time zone is an identifier for a time offset that is 4 hours behind the
UTC time zone.
This time pattern is maintained using highly accurate atomic clocks matched to the Earth's rotation.
In this section, you will learn key facts about this time zone and stay well informed.
The IANA time zone identifier used is Etc/GMT+4.
Please be aware that this time zone is observed during
Daylight Saving Time (DST) in the spring, summer, and autumn months.
During the winter months, clocks went back one hour to the
UTC-3 offset and Atlantic Daylight Time is observed.
About This Time Pattern
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Time Offset: UTC-4, UTC-04:00
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Abbreviation: AST Time
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DST Began: 2nd Sunday in March (clocks go forward one hour).
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DST Ends: 1st Sunday in November (clocks went back one hour).
What is Atlantic Standard Time Zone Right Now?
This time zone is a time offset that subtracts 4 hours from
Coordinated Universal Time (UTC).
In the map above we highlight the entire region covered by this time zone.
Its main cities and territories are:
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San Juan PR
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St. John's
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Bridgetown
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Roseau
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Marigot
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Gustavia
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Santo Domingo
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St. George's
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Georgetown
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Philipsburg
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Lower Prince's Quarter
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Oranjestad
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The Bottom
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Willemstad
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Kralendijk
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Basseterre
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Castries
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Kingstown
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Charlottetown
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Fredericton
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Moncton
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Greater Moncton
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Halifax
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Charlotte Amalie
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Plymouth
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Brades
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Little Bay
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Brades
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Road Town
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Hamilton
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The Valley
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Port of Spain
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San Fernando
In the map above we highlight the entire region covered by the time zone.
This time offset is also observed during standard time and daylight saving time for various geographic regions.
You need to be very careful finding these time zones that may have different names and abbreviations, but have the same UTC offset:
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Amazon Time (AMT)
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Bolivia Time (BOT)
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Cuba Daylight Time (CDT)
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Chile Standard Time (CLT)
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Colombia Summer Time (COST)
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Eastern Caribbean Time (ECT)
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Eastern Daylight Time (EDT)
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Falkland Islands Time (FKT)
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Guyana Time (GYT)
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Paraguay Time (PYT)
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Venezuelan Standard Time (VET)
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Quebec Time Zone (Q)
Main Countries
This time zone is used in the following countries:
In the Canada, this time offset is present in the provinces of Nova Scotia, New Brunswick, Prince Edward Island, Most of Labrador, Magdalen Islands and Côte-Nord (
Quebec).
In France, this time zone is present in the territories of Guadeloupe, Saint Barthélemy and Saint-Martin.
In Netherlands, this time zone is present in the territories of Aruba, Bonaire, Curaçao, Saba, Sint Eustatius and Sint Maarten.
In the United Kingdom, this time zone is present in the territories of Anguilla, Bermuda, British Virgin Islands and Montserrat.
In the USA, this time zone is present in the territories of
Puerto Rico and U.S. Virgin Islands.
Current Atlantic Standard Time with seconds according to the official atomic clock.
