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AST to GMT: Atlantic Time to Greenwich Mean Time

4 hours ahead of AST

GMT compared with AST, right now. Swap: GMT to AST ⇄

ASTTuesday, November 3, 2026AST · UTC−4GMTTuesday, November 3, 2026UTC · UTC+0

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AST to GMT conversion table

For Tuesday, November 3, 2026. Rows where both places are inside 9 AM–5 PM are highlighted.

ASTGMT
12:00 AM4:00 AM
1:00 AM5:00 AM
2:00 AM6:00 AM
3:00 AM7:00 AM
4:00 AM8:00 AM
5:00 AM9:00 AM
6:00 AM10:00 AM
7:00 AM11:00 AM
8:00 AM12:00 PM
9:00 AM1:00 PM
10:00 AM2:00 PM
11:00 AM3:00 PM
12:00 PM4:00 PM
1:00 PM5:00 PM
2:00 PM6:00 PM
3:00 PM7:00 PM
4:00 PM8:00 PM
5:00 PM9:00 PM
6:00 PM10:00 PM
7:00 PM11:00 PM
8:00 PM12:00 AM (next day)
9:00 PM1:00 AM (next day)
10:00 PM2:00 AM (next day)
11:00 PM3:00 AM (next day)

About these time zones

AST: Atlantic Standard Time

Atlantic Time (AST/ADT). Nova Scotia, New Brunswick and Prince Edward Island (with daylight saving), plus Puerto Rico and much of the Caribbean, which stay on AST (UTC−4) all year.

Sunday, March 14, 2027: clocks go forward 1 hour at 2:00 AM local time (UTC−4 → UTC−3).

GMT: Coordinated Universal Time

Greenwich Mean Time (GMT). Equal to UTC for everyday use. The United Kingdom, Ireland, Portugal, Iceland and much of West Africa use GMT in winter or all year; the UK switches to BST (UTC+1) in summer.

No clock change is scheduled; the offset stays the same all year.

Questions about AST and GMT time

What is the time difference between AST and GMT?

The current difference is shown at the top of this page. AST uses Atlantic Standard Time (AST, UTC−4) as standard time and Atlantic Daylight Time (ADT, UTC−3) during daylight saving time; GMT uses Coordinated Universal Time (UTC, UTC+0) all year. The difference can change if only one side observes daylight saving time or if their clocks change on different dates. Choose your meeting date in the converter to check the applicable offset.

When it is 9:00 AM in AST, what time is it in GMT?

On Tuesday, November 3, 2026, 9:00 AM in AST was 1:00 PM in GMT. The conversion table above shows today’s values.

Do the clocks change in AST or GMT?

AST: Sunday, March 14, 2027: clocks go forward 1 hour at 2:00 AM local time (UTC−4 → UTC−3). GMT does not change its clocks.

Is AST the same as ADT?

AST is the standard-time name and ADT the daylight-saving name for Atlantic Time. People often say AST all year; this converter uses the time actually in effect on the date you choose.

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