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GMT to EST converter

Eastern Time (EST) is 4 hours behind Greenwich Mean Time (GMT) for most of the year, and 5 hours for the rest because of daylight saving time.

Greenwich Mean Time · GMT

9:01 AM

Sunday 25 October

Eastern Time · EDT

5:01 AM

Sunday 25 October

Right now, Eastern Time is 4 hours behind Greenwich Mean Time. Updates live from your device’s clock.

Hour by hour

Today’s conversion. Green dots mark 9-to-5 working hours.

GMT to EST time conversion table for today
GMTEST
12:00 AM8:00 PMprev day
1:00 AM9:00 PMprev day
2:00 AM10:00 PMprev day
3:00 AM11:00 PMprev day
4:00 AM12:00 AM
5:00 AM1:00 AM
6:00 AM2:00 AM
7:00 AM3:00 AM
8:00 AM4:00 AM
9:00 AM5:00 AM
10:00 AM6:00 AM
11:00 AM7:00 AM
12:00 PM8:00 AM
1:00 PM9:00 AM
2:00 PM10:00 AM
3:00 PM11:00 AM
4:00 PM12:00 PM
5:00 PM1:00 PM
6:00 PM2:00 PM
7:00 PM3:00 PM
8:00 PM4:00 PM
9:00 PM5:00 PM
10:00 PM6:00 PM
11:00 PM7:00 PM

Best time to meet

When both sides are inside 9 AM–5 PM on a weekday, in winter and in summer. If there’s no overlap, we show when both are awake (8 AM–9 PM).

Mid-January

  • 2:00 PM–5:00 PMin GMT=9:00 AM–12:00 PMin EST

Mid-July

  • 1:00 PM–5:00 PMin GMT=9:00 AM–1:00 PMin EST

When the gap changes

  • 25 October 2026 → 1 November 2026EST −4h
  • 1 November 2026 → 14 March 2027EST −5h
  • 14 March 2027 → 7 November 2027EST −4h

GMT is UTC+0 and never changes. The UK uses GMT in winter only; in summer it switches to BST (UTC+1).

Eastern Time is EST (UTC−5) in winter and EDT (UTC−4) from March to November. It covers New York, Washington, Boston, Atlanta, Miami and Toronto.

Questions

What is the time difference between Greenwich Mean Time and Eastern Time?

Eastern Time is 4 hours behind Greenwich Mean Time for most of the year. Because of daylight saving time, the gap is 5 hours for part of the year.

If it's 9 AM in Greenwich Mean Time, what time is it in Eastern Time?

When it's 9:00 AM in Greenwich Mean Time, it's 5:00 AM in Eastern Time. At 5:00 PM in Greenwich Mean Time, it's 1:00 PM in Eastern Time. (Based on today's offsets.)

What is the best time for a call between Greenwich Mean Time and Eastern Time?

Working hours overlap from 2:00 PM to 5:00 PM in Greenwich Mean Time, which is 9:00 AM to 12:00 PM in Eastern Time.

Does Greenwich Mean Time use daylight saving time?

No. Greenwich Mean Time stays on the same offset all year.

Does Eastern Time use daylight saving time?

Yes. Eastern Time's next clock changes are on Sunday, 1 November 2026 (back one hour) and Sunday, 14 March 2027 (forward one hour).