GMT to AST Converter

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

GMT Time

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AST Time

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GMT AST

GMT to AST Conversion Chart

GMT (UTC+0) AST (UTC-4)
12:00 AM08:00 PM (Prev. Day)
01:00 AM09:00 PM (Prev. Day)
02:00 AM10:00 PM (Prev. Day)
03:00 AM11:00 PM (Prev. Day)
04:00 AM12:00 AM
05:00 AM01:00 AM
06:00 AM02:00 AM
07:00 AM03:00 AM
08:00 AM04:00 AM
09:00 AM05:00 AM
10:00 AM06:00 AM
11:00 AM07:00 AM
12:00 PM08:00 AM
01:00 PM09:00 AM
02:00 PM10:00 AM
03:00 PM11:00 AM
04:00 PM12:00 PM
05:00 PM01:00 PM
06:00 PM02:00 PM
07:00 PM03:00 PM
08:00 PM04:00 PM
09:00 PM05:00 PM
10:00 PM06:00 PM
11:00 PM07:00 PM

Frequently Asked Questions (FAQs)

What is the time difference between GMT and AST? ▾

Atlantic Standard Time (AST) is 4 hours behind Greenwich Mean Time (GMT). For example, if it's 12:00 PM in GMT, it will be 8:00 AM in AST on the same day.

What does AST stand for? ▾

AST stands for Atlantic Standard Time. It corresponds to a UTC offset of -4 hours (UTC-4).

What is the difference between AST and ADT? ▾

ADT (Atlantic Daylight Time, UTC-3) is the daylight saving time variant of AST. Many regions that use AST switch to ADT during their summer months.

Which places use AST? ▾

AST is used as standard time by several Caribbean islands and parts of Canada. Some places, like Puerto Rico and the U.S. Virgin Islands, use AST year-round.

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