Timezone conversion
GMT/BST to EST/EDT
Convert Greenwich Mean Time (GMT/BST) to Eastern Time (EST/EDT). Daylight-saving adjustments are applied automatically.
Conversion table
Common times in GMT/BST and their equivalents in EST/EDT:
| GMT/BST | EST/EDT |
|---|---|
| 12:00 AM | 7:00 PMWed |
| 3:00 AM | 10:00 PMWed |
| 6:00 AM | 1:00 AM |
| 9:00 AM | 4:00 AM |
| 12:00 PM | 7:00 AM |
| 3:00 PM | 10:00 AM |
| 6:00 PM | 1:00 PM |
| 9:00 PM | 4:00 PM |
Table computed using a fixed reference date to keep output stable. Use the full converter for any date and time.
Common meeting times
Quick translations for typical business hours in Greenwich Mean Time:
- 9:00 AM GMT/BST4:00 AM EST/EDT
- 12:00 PM GMT/BST7:00 AM EST/EDT
- 3:00 PM GMT/BST10:00 AM EST/EDT
- 5:00 PM GMT/BST12:00 PM EST/EDT
Best time to schedule a call
The ideal window where both GMT/BST and EST/EDT are inside business hours (08:00–18:00) is 1:00 PM–6:00 PM GMT/BST, which is 8:00 AM–1:00 PM EST/EDT.
Upcoming offset transitions
At least one of these zones observes DST. The hours-apart number changes on the following dates over the next 12 months:
- Mar 9, 2026 — gap becomes -4h
- Mar 30, 2026 — gap becomes -5h
- Oct 26, 2026 — gap becomes -4h
- Nov 2, 2026 — gap becomes -5h
Sample calendar invite
Copy-paste this into your calendar event so attendees see both zones spelled out.
Subject: Sync meeting Time: 10:00 AM GMT/BST (Greenwich Mean Time) = 5:00 AM EST/EDT (Eastern Time) Date: Thursday, 15 January 2026 Notes: Greenwich Mean Time ↔ Eastern Time conversion handled with DST applied automatically.
About Greenwich Mean Time and Eastern Time
Greenwich Mean Time
Zone: Europe/London
Abbreviation: GMT/BST
Eastern Time
Zone: America/New_York
Abbreviation: EST/EDT
Related conversions
Frequently asked questions
- What time is it in Eastern Time when it's noon in Greenwich Mean Time?
- When it's 12:00 PM GMT/BST, it's 7:00 AM EST/EDT.
- What's the best time to schedule a call between GMT/BST and EST/EDT?
- Business-hour overlap (08:00–18:00 in both zones) lands at 1:00 PM–6:00 PM GMT/BST, which is 8:00 AM–1:00 PM EST/EDT. Schedule inside that window for both sides to be in their working day.
- Does the time difference between GMT/BST and EST/EDT change during the year?
- Yes — at least one zone observes daylight saving time, so the gap shifts during the year. Upcoming transitions: Mar 9, 2026, Mar 30, 2026, Oct 26, 2026, Nov 2, 2026.
- Does this converter handle daylight saving time?
- Yes. All calculations use the IANA time zone database (via Luxon), so DST transitions for both Greenwich Mean Time and Eastern Time are applied automatically.
Need something else? Convert any time between any two zones →