Time Difference: New York and London
London is 5 hours ahead of New York for most of the year. 9:00 AM in New York is 2:00 PM in London, or 1:00 PM in the few weeks when the gap is 4 hours.
Daylight saving note: London is 5 hours ahead of New York in winter and in summer. For a few weeks in March and about a week in late October the gap is 4 hours, because the US and the UK change their clocks on different dates.
Why the Gap Is Not Always 5 Hours
New York is UTC-5 in winter and UTC-4 in summer. London is UTC+0 in winter and UTC+1 in summer. When both sit in the same season, London is 5 hours ahead. When only one of them has changed, it is 4.
The US moves its clocks forward on the second Sunday in March, which is two to three weeks before the UK does on the last Sunday in March. In autumn, the UK goes back on the last Sunday in October, about a week before the US does on the first Sunday in November. Those two short windows are the only times the gap is 4 hours.
So a 2:00 PM London call is 9:00 AM in New York in most weeks, and 10:00 AM in the short windows. A recurring series is safe in either city's time as long as you check the week of each change.
New York to London Conversion Table
Each column is one real season of the New York-London gap. Pick the column that matches your date.
| 🇺🇸 New York (ET) | 🇬🇧 London (EST → GMT) | 🇬🇧 London (EDT → BST) | 🇬🇧 London (EDT → GMT) |
|---|---|---|---|
| 00:00 | 05:00 | 05:00 | 04:00 |
| 03:00 | 08:00 | 08:00 | 07:00 |
| 06:00 | 11:00 | 11:00 | 10:00 |
| 09:00 | 14:00 | 14:00 | 13:00 |
| 12:00 | 17:00 | 17:00 | 16:00 |
| 15:00 | 20:00 | 20:00 | 19:00 |
| 18:00 | 23:00 | 23:00 | 22:00 |
| 21:00 | 02:00(next day) | 02:00(next day) | 01:00(next day) |
- EST → GMT: first Sunday in November to second Sunday in March, while both are on standard time
- EDT → BST: last Sunday in March to last Sunday in October, while both are on summer time
- EDT → GMT: a few weeks from the second Sunday in March, and about a week from the last Sunday in October, when only the US is on summer time
* "next day" / "prev day" = the converted time falls on a different calendar date.
The Only Reliable Overlap Window
On 9-to-5 days, both teams are at work together only for the New York morning. 9:00 AM to 12:00 PM in New York is 2:00 PM to 5:00 PM in London, 3 hours in all. After noon in New York, London has passed its 5:00 PM close. In the 4-hour windows the same New York morning is 1:00 PM to 4:00 PM in London, an hour earlier.
Avoiding New York-London Time Mistakes
London is ahead, so a late evening in New York is already the next calendar day in London. With a 5 hours gap, that starts at 7:00 PM in New York: 7:30 PM there is 12:30 AM the next day in London. When the gap narrows to 4 hours, the date line moves to 8:00 PM.
Don't carry a remembered "5 hours" into the wrong weeks. A call fixed at 10:00 AM New York time is 3:00 PM in London most of the year and 2:00 PM in the 4-hour weeks, so London may join an hour early or late if nobody checks. Put both times in the invite.
Frequently Asked Questions
What is the exact time difference between New York and London?
London is 5 hours ahead of New York for most of the year. For a few weeks in March and about a week in late October the gap is 4 hours, because the US and the UK change clocks on different dates.
What time is 9 AM New York in London?
2:00 PM in London in most weeks. In the short windows when the gap is 4 hours, 9:00 AM in New York is 1:00 PM in London.
Is London always ahead of New York?
Yes. London is at least 4 hours ahead of New York on every day of the year, so New York is never ahead of London.
What is the best meeting time for New York and London teams?
The New York morning. 9:00 AM to 12:00 PM there is 2:00 PM to 5:00 PM in London, which is the only stretch where both are inside a 9-to-5 day.