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 Greenwich Mean Time (GMT) to Eastern Standard Time (EST) for any date and time.
Eastern Time is 4 hours behind GMT from March to November, and 5 hours behind the rest of the year.
Right now GMT is UTC+0 and Eastern Time is on EST (UTC−5). Eastern Time switches to daylight saving time on 14 March 2027.
9:00 am to 5:00 pm GMT is 4:00 am to 12:00 pm EST.
Greenwich Mean TimeReference
UTC+0 all year; the UK switches to BST in summer
Wed, Nov 4
Eastern Time
US & Canada
Tue, Nov 3Previous day
Best time to meet 2:00 PM–5:00 PM in Greenwich Mean Time on Wed, Nov 4, 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 GMT, converted to EST. Hatched cells are working hours (9:00 am to 5:00 pm); rows with the accent bar are working hours in both zones.
| GMT | ESTUntil 14 March 2027 | EDTFrom 14 March 2027 |
|---|---|---|
| 12:00 am GMT | 7:00 pm EST(day before) | 8:00 pm EDT(day before) |
| 1:00 am GMT | 8:00 pm EST(day before) | 9:00 pm EDT(day before) |
| 2:00 am GMT | 9:00 pm EST(day before) | 10:00 pm EDT(day before) |
| 3:00 am GMT | 10:00 pm EST(day before) | 11:00 pm EDT(day before) |
| 4:00 am GMT | 11:00 pm EST(day before) | 12:00 am EDT |
| 5:00 am GMT | 12:00 am EST | 1:00 am EDT |
| 6:00 am GMT | 1:00 am EST | 2:00 am EDT |
| 7:00 am GMT | 2:00 am EST | 3:00 am EDT |
| 8:00 am GMT | 3:00 am EST | 4:00 am EDT |
| 9:00 am GMT | 4:00 am EST | 5:00 am EDT |
| 10:00 am GMT | 5:00 am EST | 6:00 am EDT |
| 11:00 am GMT | 6:00 am EST | 7:00 am EDT |
| 12:00 pm GMT | 7:00 am EST | 8:00 am EDT |
| 1:00 pm GMT | 8:00 am EST | 9:00 am EDT |
| 2:00 pm GMT | 9:00 am EST | 10:00 am EDT |
| 3:00 pm GMT | 10:00 am EST | 11:00 am EDT |
| 4:00 pm GMT | 11:00 am EST | 12:00 pm EDT |
| 5:00 pm GMT | 12:00 pm EST | 1:00 pm EDT |
| 6:00 pm GMT | 1:00 pm EST | 2:00 pm EDT |
| 7:00 pm GMT | 2:00 pm EST | 3:00 pm EDT |
| 8:00 pm GMT | 3:00 pm EST | 4:00 pm EDT |
| 9:00 pm GMT | 4:00 pm EST | 5:00 pm EDT |
| 10:00 pm GMT | 5:00 pm EST | 6:00 pm EDT |
| 11:00 pm GMT | 6:00 pm EST | 7:00 pm EDT |
Your working hours overlap for 3 hours, from 2:00 pm GMT (9:00 am EST) to 5:00 pm GMT (12:00 pm EST). That's the best window for a meeting.
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.
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.