Convert ET to GMT

Eastern Time (ET) to Greenwich Mean Time (GMT)

Financial firms on Wall Street, consultancies with London offices, and transatlantic sales teams search this daily. New York and London are the world's two largest financial centers, making this one of the highest-volume time zone conversions globally.

When it's 12:00 PM in New York, it's 4:00 PM GMT

On Jan 1 – Mar 7, 2026; Nov 1, 2026 – Mar 13, 2027; Nov 7 – Dec 31, 2027: 5:00 PM GMT.

ET UTC-5 / UTC-4 GMT UTC±0 +4/+5h

Interactive Converter

Pick any time and date to convert between ET and GMT.

ET to GMT Conversion Table

Full 24-hour comparison. Business hours (9 AM -- 6 PM) are highlighted.

New York (ET)	GMT (GMT)
12:00 AM	4:00 AM
1:00 AM	5:00 AM
2:00 AM	6:00 AM
3:00 AM	7:00 AM
4:00 AM	8:00 AM
5:00 AM	9:00 AM
6:00 AM	10:00 AM
7:00 AM	11:00 AM
8:00 AM	12:00 PM
9:00 AM	1:00 PM
10:00 AM	2:00 PM
11:00 AM	3:00 PM
12:00 PM	4:00 PM
1:00 PM	5:00 PM
2:00 PM	6:00 PM
3:00 PM	7:00 PM
4:00 PM	8:00 PM
5:00 PM	9:00 PM
6:00 PM	10:00 PM
7:00 PM	11:00 PM
8:00 PM	12:00 AM +1 day
9:00 PM	1:00 AM +1 day
10:00 PM	2:00 AM +1 day
11:00 PM	3:00 AM +1 day

These times apply on all dates in 2026–2027 except:

Jan 1 – Mar 7, 2026; Nov 1, 2026 – Mar 13, 2027; Nov 7 – Dec 31, 2027: GMT times are 1 hour later.

Best Meeting Window

Top meeting times for teams in ET and GMT (9 AM -- 6 PM work hours, 1-hour meeting).

12a

12p

New York

GMT

Overlap

Everyone available

Most available

Some overlap

Outside work hours

1 11:00 AM -- 12:00 PM in New York

New York: 11:00 AM GMT: 3:00 PM

All members within working hours. Everyone in mid-day range.

8.6 / 10

2 12:00 PM -- 1:00 PM in New York

New York: 12:00 PM GMT: 4:00 PM

All members within working hours. Everyone in mid-day range.

8.6 / 10

3 10:00 AM -- 11:00 AM in New York

New York: 10:00 AM GMT: 2:00 PM

All members within working hours. Everyone in mid-day range.

8.4 / 10

These times apply on all dates in 2026–2027 except:

Jan 1 – Mar 7, 2026; Nov 1, 2026 – Mar 13, 2027; Nov 7 – Dec 31, 2027: GMT times are 1 hour later.

Try the Meeting Planner with custom work hours →

Scheduling Tips

The prime overlap is 9:00 AM-12:00 PM EST / 2:00-5:00 PM GMT. Both teams are in core working hours.
If you meet with London, mark the March and October DST gap weeks on your calendar. Recurring meetings shift by 1 hour during those windows.
For critical transatlantic deals, send calendar invites with both time zones explicitly noted to avoid confusion during DST transitions.

Time Difference & DST

The ET to GMT gap is +4h or +5h, depending on daylight saving time. The table lists each period.

Dates	New York	GMT	Difference
Jan 1 – Mar 7, 2026	UTC-5	UTC±0	+5h
Mar 8 – Oct 31, 2026	UTC-4	UTC±0	+4h
Nov 1, 2026 – Mar 13, 2027	UTC-5	UTC±0	+5h
Mar 14 – Nov 6, 2027	UTC-4	UTC±0	+4h
Nov 7 – Dec 31, 2027	UTC-5	UTC±0	+5h

GMT does not use daylight saving time.

UK clocks use BST (UTC+1) from the last Sunday in March to the last Sunday in October.

Use the interactive converter for a specific date.

Major Cities

Eastern Time (ET)

New York
Miami
Atlanta

Greenwich Mean Time (GMT)

Frequently Asked Questions

What is the time difference between EST and GMT?

EST (Eastern Standard Time, UTC-5) is 5 hours behind GMT (UTC+0). When it is 9:00 AM EST, it is 2:00 PM GMT. From mid-March to early November, New York uses EDT (UTC-4), so the gap to GMT is 4 hours. London time is different: UK clocks use BST (UTC+1) in summer, so London stays 5 hours ahead of New York for most of the year.

When does the EST-GMT offset change?

GMT never changes, so the offset changes only on US dates. The US springs forward to EDT on the second Sunday in March, and the gap becomes 4 hours. The US falls back on the first Sunday in November, and the gap returns to 5 hours. London time also changes, on the last Sundays of March and October. For exact dates each year, see DST Explained.

What is 9 AM EST in GMT?

9:00 AM EST is 2:00 PM GMT. This is mid-afternoon in London, making it one of the most popular transatlantic meeting slots.

What is 12 PM EST in GMT?

12:00 PM (noon) EST is 5:00 PM GMT. London is wrapping up for the day, so this is the latest practical slot for UK colleagues.

What is 5 PM GMT in EST?

5:00 PM GMT is 12:00 PM (noon) EST. The UK workday ends as the US East Coast hits lunchtime. Plan handoffs around this crossover.

Is GMT the same as UTC?

For scheduling, yes. GMT and UTC both stay at UTC+0 all year. UK clocks are different: they use GMT in winter and BST (UTC+1) in summer, so London time is 1 hour ahead of GMT from late March to late October.

What are the DST gap weeks between New York and London?

In spring, there are roughly 2-3 weeks (mid-March to late March) where the US has already moved to EDT but the UK is still on GMT, shrinking the gap to 4 hours. In fall, there is about 1 week (late October to early November) where the UK has reverted to GMT but the US is still on EDT.

What is 3 PM EST in London time?

3:00 PM EST is 8:00 PM GMT. This is well outside UK business hours. Avoid scheduling meetings this late for London-based colleagues.

Related Guides

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Optimal calling hours from US time zones to CET, GMT, and EET. Maximize overlap for transatlantic team meetings.

What Is Daylight Saving Time? History, Rules & Impact on Teams

Learn what DST is, which countries observe it, and how clock changes affect distributed team scheduling across time zones.

Related Conversions

New York → Los Angeles

PT → ET +3h

Los Angeles → New York

Popular Conversions

ET → IST +9:30/+10:30h

New York → Mumbai

ET → CET +5/+6h

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PT → IST +12:30/+13:30h

Los Angeles → Mumbai

ET → PT -3h

New York → Los Angeles

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Los Angeles → GMT

CET → IST +3:30/+4:30h

ET → AEST +14/+15/+16h

New York → Sydney

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