Time zone and daylight saving checker
London is usually 5 hours ahead of New York. The gap is different from now to 1 November 2026 (4 hours ahead) and from 14 March 2027 to 27 March 2027 (4 hours ahead), because the two change their clocks on different dates. So a 15:00 meeting in New York is at 19:00 in London in those weeks, instead of the usual 20:00.
Check your own meeting
Pick where you are, where the other person is, and the meeting time on your side. The table shows what that time is for them on each stretch of the next year, and flags the weeks when the gap changes.
| From | To | Gap | Their time |
|---|---|---|---|
| Needs JavaScript. The pairs below work without it. | |||
Time differences that change during the year
Common pairs for bookings, for the next twelve months. Dates are in the first place's calendar.
| Between | Usual gap | When it differs |
|---|---|---|
| New York and London | London 5 hours ahead of New York | now to 1 November 2026: 4 hours ahead; 14 March 2027 to 27 March 2027: 4 hours ahead |
| Los Angeles and London | London 8 hours ahead of Los Angeles | now to 1 November 2026: 7 hours ahead; 14 March 2027 to 27 March 2027: 7 hours ahead |
| New York and Berlin | Berlin 6 hours ahead of New York | now to 1 November 2026: 5 hours ahead; 14 March 2027 to 27 March 2027: 5 hours ahead |
| Chicago and London | London 6 hours ahead of Chicago | now to 1 November 2026: 5 hours ahead; 14 March 2027 to 27 March 2027: 5 hours ahead |
| London and Sydney | Sydney 9 hours ahead of London | now to 28 March 2027: 11 hours ahead; 28 March 2027 to 3 April 2027: 10 hours ahead; 2 October 2027 to 29 October 2027: 10 hours ahead |
| New York and Sydney | Sydney 14 hours ahead of New York | now to 1 November 2026: 15 hours ahead; 1 November 2026 to 14 March 2027: 16 hours ahead; 14 March 2027 to 3 April 2027: 15 hours ahead; 2 October 2027 to 28 October 2027: 15 hours ahead |
| New York and Kolkata | Kolkata 9½ hours ahead of New York | 1 November 2026 to 14 March 2027: 10½ hours ahead |
| Chicago and Mexico City | Mexico City 1 hour behind Chicago | 1 November 2026 to 14 March 2027: the same time |
| Denver and Phoenix | Phoenix 1 hour behind Denver | 1 November 2026 to 14 March 2027: the same time |
Why booking pages get this wrong
The US and Europe change their clocks on different weekends, so for a few weeks each spring and autumn the gap between them is an hour shorter. A booking page that stored your availability as a fixed offset, or an invite sent with a fixed offset, shows the wrong time in exactly those weeks. Places without daylight saving shift against everyone who has it. The guide Why does my booking page show the wrong time zone? covers the settings to check in each tool.
Questions about time zones and daylight saving
When do the clocks change in New York and London?
New York: 1 November 2026 (clocks go back 1 hour), 14 March 2027 (clocks go forward 1 hour). London: 28 March 2027 (clocks go forward 1 hour).
What is the time difference between New York and London?
London is usually 5 hours ahead of New York. The gap is different from now to 1 November 2026 (4 hours ahead) and from 14 March 2027 to 27 March 2027 (4 hours ahead), because the two change their clocks on different dates.
Why does my booking show the wrong time after the clocks change?
Usually because a time zone was saved as a fixed offset ("UTC-5") instead of a place ("America/New_York"), so the booking page or the invite keeps the old offset when daylight saving starts or ends. Check that your booking page, your calendar and the invite all use a named time zone.
Which places do not change their clocks?
Of the pairs on this page, Phoenix, Mexico City and Kolkata keep the same time all year, so their gap to a place that does change moves twice a year.