GMT never changes for daylight saving time, but Eastern Time does, so the gap moves by an hour twice a year. The table below always shows the right one for your date.
Convert Eastern Standard Time (EST) to Greenwich Mean Time (GMT) for any date and time.
GMT is 4 hours ahead of Eastern Time from March to November, and 5 hours ahead the rest of the year.
Right now Eastern Time is on EST (UTC−5) and GMT is UTC+0. Eastern Time switches to daylight saving time on 14 March 2027.
9:00 am to 5:00 pm EST is 2:00 pm to 10:00 pm GMT.
Eastern TimeReference
US & Canada
Tue, Nov 3
Greenwich Mean Time
UTC+0 all year; the UK switches to BST in summer
Wed, Nov 4Next day
Best time to meet 9:00 AM–12:00 PM in Eastern Time on Tue, Nov 3, when everyone is inside working hours.
Book a meeting in this windowWorking hours: 9:00 AM–5:00 PM, Monday to FridayEveryone at work
Every hour of the day in EST, converted to GMT. Hatched cells are working hours (9:00 am to 5:00 pm); rows with the accent bar are working hours in both zones.
| EST / EDT | GMT (with EST)Until 14 March 2027 | GMT (with EDT)From 14 March 2027 |
|---|---|---|
| 12:00 am | 5:00 am GMT | 4:00 am GMT |
| 1:00 am | 6:00 am GMT | 5:00 am GMT |
| 2:00 am | 7:00 am GMT | 6:00 am GMT |
| 3:00 am | 8:00 am GMT | 7:00 am GMT |
| 4:00 am | 9:00 am GMT | 8:00 am GMT |
| 5:00 am | 10:00 am GMT | 9:00 am GMT |
| 6:00 am | 11:00 am GMT | 10:00 am GMT |
| 7:00 am | 12:00 pm GMT | 11:00 am GMT |
| 8:00 am | 1:00 pm GMT | 12:00 pm GMT |
| 9:00 am | 2:00 pm GMT | 1:00 pm GMT |
| 10:00 am | 3:00 pm GMT | 2:00 pm GMT |
| 11:00 am | 4:00 pm GMT | 3:00 pm GMT |
| 12:00 pm | 5:00 pm GMT | 4:00 pm GMT |
| 1:00 pm | 6:00 pm GMT | 5:00 pm GMT |
| 2:00 pm | 7:00 pm GMT | 6:00 pm GMT |
| 3:00 pm | 8:00 pm GMT | 7:00 pm GMT |
| 4:00 pm | 9:00 pm GMT | 8:00 pm GMT |
| 5:00 pm | 10:00 pm GMT | 9:00 pm GMT |
| 6:00 pm | 11:00 pm GMT | 10:00 pm GMT |
| 7:00 pm | 12:00 am GMT(next day) | 11:00 pm GMT |
| 8:00 pm | 1:00 am GMT(next day) | 12:00 am GMT(next day) |
| 9:00 pm | 2:00 am GMT(next day) | 1:00 am GMT(next day) |
| 10:00 pm | 3:00 am GMT(next day) | 2:00 am GMT(next day) |
| 11:00 pm | 4:00 am GMT(next day) | 3:00 am GMT(next day) |
Your working hours overlap for 3 hours, from 9:00 am EST (2:00 pm GMT) to 12:00 pm EST (5:00 pm GMT). That's the best window for a meeting.
Eastern Standard Time is UTC−5.
New York, Florida, Georgia, the Carolinas, Ohio, Michigan and the rest of the East Coast, plus Ontario and Quebec in Canada. Panama, Jamaica and Cancún stay on EST all year. ET is the short form for the whole zone.
Greenwich Mean Time is UTC+0.
The same time as UTC. The UK, Ireland and Portugal use GMT in winter, then switch to summer time (BST in the UK) from late March to late October. Iceland and much of West Africa stay on GMT all year.