What is GMT in EST?
Eastern Time is 4 hours behind
Greenwich Mean Time is on UTC+0:00 and Eastern Time is on UTC−4:00 right now. Eastern Time is on daylight saving, so its clocks read EDT. The gap changes during the year — see below.
- Time in Greenwich
- 12:53 am
- Time in New York
- 8:53 pm
- Difference
- −4 h
- Next clock change
- November 1, 2026
Convert a time
EDT — Eastern Time
8:00 pm
Tue, the previous day
When the difference changes
Greenwich Mean Time and Eastern Time do not change their clocks on the same dates, so the gap between them is not the same all year. Most converters show only today’s figure. These are the periods ahead:
- Now – November 1, 2026Eastern Time is 4 hours behind
- November 1, 2026 – March 14, 2027Eastern Time is 5 hours behind
- March 14, 2027 – onwardsEastern Time is 4 hours behind
Periods shorter than a day are not listed: both zones change at 2am in their own local time, so there are a few hours on each transition date when the gap is briefly something else.
Daylight saving
Greenwich Mean Time
Greenwich Mean Time stays on GMT all year, so its offset from UTC never moves.
Eastern Time
Clocks go back one hour at 2am local time, becoming EST.
GMT to EST conversion table
Every hour of Wednesday, September 23, 2026, converted from Greenwich Mean Time to Eastern Time. 4 of the 24 hours fall on a different calendar day in New York, which is marked.
- 12:00 am GMT
- 8:00 pm EDT−1 day
- 1:00 am GMT
- 9:00 pm EDT−1 day
- 2:00 am GMT
- 10:00 pm EDT−1 day
- 3:00 am GMT
- 11:00 pm EDT−1 day
- 4:00 am GMT
- 12:00 am EDT
- 5:00 am GMT
- 1:00 am EDT
- 6:00 am GMT
- 2:00 am EDT
- 7:00 am GMT
- 3:00 am EDT
- 8:00 am GMT
- 4:00 am EDT
- 9:00 am GMT
- 5:00 am EDT
- 10:00 am GMT
- 6:00 am EDT
- 11:00 am GMT
- 7:00 am EDT
- 12:00 pm GMT
- 8:00 am EDT
- 1:00 pm GMT
- 9:00 am EDT
- 2:00 pm GMT
- 10:00 am EDT
- 3:00 pm GMT
- 11:00 am EDT
- 4:00 pm GMT
- 12:00 pm EDT
- 5:00 pm GMT
- 1:00 pm EDT
- 6:00 pm GMT
- 2:00 pm EDT
- 7:00 pm GMT
- 3:00 pm EDT
- 8:00 pm GMT
- 4:00 pm EDT
- 9:00 pm GMT
- 5:00 pm EDT
- 10:00 pm GMT
- 6:00 pm EDT
- 11:00 pm GMT
- 7:00 pm EDT
Scheduling between the two
Working hours overlap from 1:00 pm to 6:00 pm GMT, which is 9:00 am to 2:00 pm EDT. Anything inside that window falls in the normal working day at both ends.
Greenwich Mean Time (GMT) is used in as a fixed UTC+0 offset. Note that the UK itself leaves GMT every summer — see British Time below.
Eastern Time (EDT) is used in Toronto, Atlanta, Miami, Detroit and most of the US east coast