GMT to EST
New York is five hours behind London for most of the year: 3:00 PM in London is 10:00 AM in New York. The gap shrinks to four hours for about three weeks in March and one week around the end of October, because the US and the UK change their clocks on different Sundays.
Convert the other way: EST → GMT
The weeks when London and New York are four hours apart
The United States starts daylight saving on the second Sunday of March; the UK switches to British Summer Time on the last Sunday of March. In between, New York is already on EDT (UTC−4) while London is still on GMT (UTC+0), so the difference is four hours. In autumn the order flips: the UK returns to GMT on the last Sunday of October and the US falls back a week later, on the first Sunday of November. In 2026 that short gap runs from October 25 to November 1.
Recurring transatlantic meetings created in a calendar app shift automatically for the person who did not set them, so a standing 2:00 PM London call moves to 9:00 AM or 10:00 AM in New York depending on the week. Check the converter for any date in those windows.
When to call New York from the UK
Strictly, London is only on GMT in winter; from late March to late October it uses BST (UTC+1). People still say "GMT" year-round, and this page follows the London clock in every season. New York opens for business at about 2:00 PM London time, so UK teams usually reserve 2:00–5:00 PM for American calls. The busiest hours in currency trading are the London–New York overlap, roughly 1:00–5:00 PM London.
A flight from Heathrow to JFK takes around eight hours, so an 11:00 AM departure lands around 2:00 PM local time in New York, the same afternoon. For the view from New York, open EST to GMT.
Cities on these zones
GMT → EST quick reference
Every hour of the day, using today's offsets (daylight saving is applied automatically).
| GMT | EST |
|---|---|
| 12:00 AM | 7:00 PM−1 |
| 1:00 AM | 8:00 PM−1 |
| 2:00 AM | 9:00 PM−1 |
| 3:00 AM | 10:00 PM−1 |
| 4:00 AM | 11:00 PM−1 |
| 5:00 AM | 12:00 AM |
| 6:00 AM | 1:00 AM |
| 7:00 AM | 2:00 AM |
| 8:00 AM | 3:00 AM |
| 9:00 AM | 4:00 AM |
| 10:00 AM | 5:00 AM |
| 11:00 AM | 6:00 AM |
| GMT | EST |
|---|---|
| 12:00 PM | 7:00 AM |
| 1:00 PM | 8:00 AM |
| 2:00 PM | 9:00 AM |
| 3:00 PM | 10:00 AM |
| 4:00 PM | 11:00 AM |
| 5:00 PM | 12:00 PM |
| 6:00 PM | 1:00 PM |
| 7:00 PM | 2:00 PM |
| 8:00 PM | 3:00 PM |
| 9:00 PM | 4:00 PM |
| 10:00 PM | 5:00 PM |
| 11:00 PM | 6:00 PM |
- Difference right now
- EST 5 hours behind GMT
- Shared office hours
- 11 PM–2 AM GMT
- Daylight saving
- Both zones shift their clocks
Clock changes this year
- Mar 29, 2026GMT: clocks go forward, UTC+0 → UTC+1
- Oct 25, 2026GMT: clocks go back, UTC+1 → UTC+0
- Mar 8, 2026EST: clocks go forward, UTC−5 → UTC−4
- Nov 1, 2026EST: clocks go back, UTC−4 → UTC−5
Other conversions with these zones
Frequently asked questions
- What time is 3 PM London time in New York?
- Usually 10:00 AM in New York. During the short periods in March and late October when only one country has changed its clocks, it is 11:00 AM.
- Is London on GMT in the summer?
- No. From the last Sunday of March to the last Sunday of October, London uses British Summer Time, UTC+1. GMT (UTC+0) applies in winter.
- Why did my transatlantic meeting move by an hour in March?
- The US switched to daylight time about three weeks before the UK did, so for those weeks the difference was four hours instead of five.
- What is the latest UK time to reach a New York office before it closes?
- About 10:00 PM London time reaches New York at 5:00 PM. Most UK teams stop well before that and aim for the 2:00–5:00 PM London window.
- When does Wall Street open in UK time?
- At 2:30 PM London time on most days, since the New York Stock Exchange opens at 9:30 AM Eastern.