GMT to AST/ADT Time Zone Converter

Easily convert times between Greenwich Mean Time (GMT) and Atlantic Time (AST/ADT).

GMT Time

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Atlantic Time

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GMT ADT

GMT to ADT Conversion Chart

GMT (UTC+0) ADT (UTC-3)
12:00 AM09:00 PM (Prev Day)
01:00 AM10:00 PM (Prev Day)
02:00 AM11:00 PM (Prev Day)
03:00 AM12:00 AM
04:00 AM01:00 AM
05:00 AM02:00 AM
06:00 AM03:00 AM
07:00 AM04:00 AM
08:00 AM05:00 AM
09:00 AM06:00 AM
10:00 AM07:00 AM
11:00 AM08:00 AM
12:00 PM09:00 AM
01:00 PM10:00 AM
02:00 PM11:00 AM
03:00 PM12:00 PM
04:00 PM01:00 PM
05:00 PM02:00 PM
06:00 PM03:00 PM
07:00 PM04:00 PM
08:00 PM05:00 PM
09:00 PM06:00 PM
10:00 PM07:00 PM
11:00 PM08:00 PM

Frequently Asked Questions (FAQs)

What is the difference between AST and ADT? ▾

Atlantic Standard Time (AST) is 4 hours behind GMT (UTC-4). During Daylight Saving Time, the zone becomes Atlantic Daylight Time (ADT), which is 3 hours behind GMT (UTC-3).

What does ADT stand for? ▾

ADT stands for Atlantic Daylight Time. It is the Daylight Saving Time (DST) version of the Atlantic Time Zone. This converter automatically accounts for the switch between AST and ADT.

When is Daylight Saving Time for the Atlantic Time Zone? ▾

Daylight Saving Time begins at 2am on the second Sunday in March and ends at 2am on the first Sunday in November for most of North America.

Which places use Atlantic Time? ▾

Atlantic Time is used by several Canadian provinces (Nova Scotia, New Brunswick, Prince Edward Island), parts of Quebec, and some Caribbean islands like Bermuda.

Convert GMT Time Zone to other time Zones

Meetmomentum.tech can convert GMT Time Zone to these other time zones easily:

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