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GMT to EST converter

Greenwich Mean Time to Eastern Time: live time, conversion table and daylight saving dates.

Eastern Time is 4 hours behind Greenwich Mean Time right now. The gap changes during the year: 5 hours behind in January and 4 hours behind in July, because of daylight saving time. 9:00 AM GMT = 4:00 AM EST in winter and 5:00 AM EST in summer.

Greenwich Mean Time
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Eastern Time
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Today, hour by hour

Greenwich Mean TimeEastern Time

Green rows are inside 9 AM–5 PM in both places.

GMT to EST conversion table

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

EST or EDT? People search “EST”, “CST” or “PST” all year, but those names only apply in winter. From March to November US clocks are on daylight time (EDT, CDT, MDT, PDT), one hour later. This page uses the real local time in each US zone, so the answers are right whichever season you read it in. More in our EST vs EDT guide.

GMT vs UK time. GMT never changes. The UK uses GMT only in winter and British Summer Time (GMT+1) from late March to late October. For London local time, use UK time to EST.

When the time difference changes

DatesDifference
Oct 9, 2026 – Oct 31, 2026Eastern Time is 4 hours behind Greenwich Mean Time
Nov 1, 2026 – Mar 13, 2027Eastern Time is 5 hours behind Greenwich Mean Time
Mar 14, 2027 – Nov 6, 2027Eastern Time is 4 hours behind Greenwich Mean Time
Nov 7, 2027 – Dec 31, 2027Eastern Time is 5 hours behind Greenwich Mean Time

Greenwich Mean Time does not use daylight saving time. It stays at UTC+0 all year. Eastern Time uses daylight saving time. Next clock changes: Nov 1, 2026 (to UTC-5), Mar 14, 2027 (to UTC-4).

Best time to call or meet

  • January: shared 9-to-5 hours are 2:00 PM–5:00 PM in Greenwich Mean Time (9:00 AM–12:00 PM in Eastern Time).
  • July: shared 9-to-5 hours are 1:00 PM–5:00 PM in Greenwich Mean Time (9:00 AM–1:00 PM in Eastern Time).

Planning with more than two places? Use the meeting planner.

Frequently asked questions

What is 9 AM GMT in EST?

4:00 AM EST in winter (January) and 5:00 AM EST in summer (July).

What is the time difference between GMT and EST?

Eastern Time is 5 hours behind Greenwich Mean Time in January and 4 hours behind in July.

What is 5 PM GMT in EST?

12:00 PM EST in winter and 1:00 PM EST in summer.