Convert GMT to ET
Greenwich Mean Time (GMT) to Eastern Time (ET)
The London-New York business corridor is one of the busiest in the world. Finance teams, law firms, and agencies crossing the Atlantic search this heavily. The tricky part is US daylight saving time: New York is 5 hours behind GMT in winter and 4 hours behind from mid-March to early November. London uses BST in summer, so London and New York are 5 hours apart for most of the year and 4 hours apart for a few weeks in spring and autumn.
When it's 12:00 PM GMT, it's 8:00 AM in New York
On Jan 1 – Mar 7, 2026; Nov 1, 2026 – Mar 13, 2027; Nov 7 – Dec 31, 2027: 7:00 AM in New York.
Interactive Converter
Pick any time and date to convert between GMT and ET.
GMT to ET Conversion Table
Full 24-hour comparison. Business hours (9 AM -- 6 PM) are highlighted.
| GMT (GMT) | New York (ET) |
|---|---|
| 12:00 AM | 8:00 PM -1 day |
| 1:00 AM | 9:00 PM -1 day |
| 2:00 AM | 10:00 PM -1 day |
| 3:00 AM | 11:00 PM -1 day |
| 4:00 AM | 12:00 AM |
| 5:00 AM | 1:00 AM |
| 6:00 AM | 2:00 AM |
| 7:00 AM | 3:00 AM |
| 8:00 AM | 4:00 AM |
| 9:00 AM | 5:00 AM |
| 10:00 AM | 6:00 AM |
| 11:00 AM | 7:00 AM |
| 12:00 PM | 8:00 AM |
| 1:00 PM | 9:00 AM |
| 2:00 PM | 10:00 AM |
| 3:00 PM | 11:00 AM |
| 4:00 PM | 12:00 PM |
| 5:00 PM | 1:00 PM |
| 6:00 PM | 2:00 PM |
| 7:00 PM | 3:00 PM |
| 8:00 PM | 4:00 PM |
| 9:00 PM | 5:00 PM |
| 10:00 PM | 6:00 PM |
| 11:00 PM | 7:00 PM |
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: New York times are 1 hour earlier.
Best Meeting Window
Top meeting times for teams in GMT and ET (9 AM -- 6 PM work hours, 1-hour meeting).
All members within working hours. Everyone in mid-day range.
All members within working hours. Everyone in mid-day range.
All members within working hours. Everyone in mid-day range.
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: New York times are 1 hour earlier.
Scheduling Tips
- The best overlap window is 2:00-5:00 PM GMT / 9:00 AM-12:00 PM EST -- both sides are in core working hours.
- Watch the US clock changes in mid-March and early November, when the GMT offset shifts between 5 and 4 hours. For London calls, also double-check recurring meetings in the 2–3 week gap in March and the 1-week gap around late October.
- For end-of-day syncs, 5:00 PM GMT / 12:00 PM EST gives London a wrap-up and New York a midday check-in.
Time Difference & DST
The GMT to ET gap is -5h or -4h, depending on daylight saving time. The table lists each period.
| Dates | GMT | New York | Difference |
|---|---|---|---|
| Jan 1 – Mar 7, 2026 | UTC±0 | UTC-5 | -5h |
| Mar 8 – Oct 31, 2026 | UTC±0 | UTC-4 | -4h |
| Nov 1, 2026 – Mar 13, 2027 | UTC±0 | UTC-5 | -5h |
| Mar 14 – Nov 6, 2027 | UTC±0 | UTC-4 | -4h |
| Nov 7 – Dec 31, 2027 | UTC±0 | UTC-5 | -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
Greenwich Mean Time (GMT)
- GMT
Eastern Time (ET)
- New York
- Miami
- Atlanta
Frequently Asked Questions
What is the time difference between GMT and EST?
When does the time difference between London and New York change?
What is BST and how does it relate to GMT?
Related Guides
Learn what DST is, which countries observe it, and how clock changes affect distributed team scheduling across time zones.
Scheduling Across Time Zones: Best Practices for Global TeamsProven strategies for scheduling meetings across multiple time zones. Reduce late-night calls and improve team fairness.
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