VesperalbaNew York and London: time difference and the hours you share
The busiest time zone pair in business. The difference is simple most of the year and quietly wrong for about four weeks of it, because the US and the UK move their clocks on different Sundays.
London is 4 hours ahead of New York right now. Turn on JavaScript to see both clocks live.
The difference and the shared work hours, month by month
Work hours here are 09:00–18:00 local, Monday to Friday, the same default the extension uses.
| From | Until | Difference | Shared 09:00–18:00 |
|---|---|---|---|
| Now (31 Oct 2026) | 1 Nov 2026 | London is 4 hours ahead of New York EDT / GMT | 5 hours 9:00 AM–2:00 PM in New York 1:00 PM–6:00 PM in London |
| 1 Nov 2026 | 14 Mar 2027 | London is 5 hours ahead of New York EST / GMT | 4 hours 9:00 AM–1:00 PM in New York 2:00 PM–6:00 PM in London |
| 14 Mar 2027 | 28 Mar 2027 | London is 4 hours ahead of New York EDT / GMT | 5 hours 9:00 AM–2:00 PM in New York 1:00 PM–6:00 PM in London |
| 28 Mar 2027 | 30 Oct 2027 and on | London is 5 hours ahead of New York EDT / BST | 4 hours 9:00 AM–1:00 PM in New York 2:00 PM–6:00 PM in London |
Daylight saving time: the next clock changes
- New York: Sun, 1 Nov 2026: at 2:00 AM clocks go back to 1:00 AM (EDT → EST, UTC−5); Sun, 14 Mar 2027: at 2:00 AM clocks go forward to 3:00 AM (EST → EDT, UTC−4)
- London: Sun, 28 Mar 2027: at 1:00 AM clocks go forward to 2:00 AM (GMT → BST, UTC+1)
The US changes clocks on the second Sunday of March and the first Sunday of November; the UK on the last Sundays of March and October.
Good to know
- Book New York – London calls in the New York morning. 9:00–11:00 AM in New York is 2:00–4:00 PM in London most of the year, comfortably inside both workdays.
- For three weeks in March and one week around the end of October, London is only 4 hours ahead. Recurring meetings set in one city’s calendar move by an hour in the other’s; check them in those weeks.
- London’s “GMT” is only the winter name. From late March to late October the UK is on BST (UTC+1), so “GMT” in a summer invite is usually a mistake.
Questions
What is the time difference between New York and London?
London is 5 hours ahead of New York most of the year. Other differences: 4 hours: 31 Oct–1 Nov, 14 Mar–28 Mar (the two places change clocks on different dates).
When do work hours in New York and London overlap?
With 09:00–18:00 on both sides, the shared window is 5 hours: 9:00 AM–2:00 PM in New York = 1:00 PM–6:00 PM in London.
Keep these clocks in your toolbar
Vesperalba is a free Chrome extension: everyone’s time and work hours on one screen, a converter that moves every city at once, and share links that open in the reader’s time zone. No account, no tracking, works offline.
Get Vesperalba for Chrome