How to read it
London and New York, side by side
Each row is one city's day, half an hour to a square, lined up by the hours along the bottom.
- 1Filled: at the desk, 9:00 to 18:00 where that city is.
- 2Grey: up early, up late, or the weekend.
- 3Outline: asleep.
- 4Red band: your slot. Read straight down to see the same moment in every city.
- 5A marks the best time for everyone; B, when there is one, the next best.
The red band is the best time to call on Wed, 21 Oct 2026: 14:00–15:00 in London, which is 09:00–10:00 in New York.
Through the year
How the gap between London and New York moves
New York is 5h behind London today. Daylight saving moves it:
- New York 5h behind London
- New York 4h behind London
- Sun, 25 Oct 2026 London's clocks go back an hour. New York is then 4h behind London.
- Sun, 1 Nov 2026 New York's clocks go back an hour. New York is then 5h behind London.
- Sun, 14 Mar 2027 New York's clocks go forward an hour. New York is then 4h behind London.
- Sun, 28 Mar 2027 London's clocks go forward an hour. New York is then 5h behind London.
Hour by hour
London to New York time, hour by hour
On a working day (Wed, 21 Oct 2026), with working hours of 9:00 to 18:00 in both cities.
- London starts work 09:00 04:00 in New York Asleep
- New York starts work 09:00 14:00 in London At desk
- London finishes work 18:00 13:00 in New York At desk
- New York finishes work 18:00 23:00 in London Asleep
Show all 24 hours
| London | New York |
|---|---|
| 00:00 Asleep | 19:00 Tue Late |
| 01:00 Asleep | 20:00 Tue Late |
| 02:00 Asleep | 21:00 Tue Late |
| 03:00 Asleep | 22:00 Tue Asleep |
| 04:00 Asleep | 23:00 Tue Asleep |
| 05:00 Asleep | 00:00 Asleep |
| 06:00 Asleep | 01:00 Asleep |
| 07:00 Early | 02:00 Asleep |
| 08:00 Early | 03:00 Asleep |
| 09:00 At desk | 04:00 Asleep |
| 10:00 At desk | 05:00 Asleep |
| 11:00 At desk | 06:00 Asleep |
| 12:00 At desk | 07:00 Early |
| 13:00 At desk | 08:00 Early |
| 14:00 At desk | 09:00 At desk |
| 15:00 At desk | 10:00 At desk |
| 16:00 At desk | 11:00 At desk |
| 17:00 At desk | 12:00 At desk |
| 18:00 Late | 13:00 At desk |
| 19:00 Late | 14:00 At desk |
| 20:00 Late | 15:00 At desk |
| 21:00 Late | 16:00 At desk |
| 22:00 Asleep | 17:00 At desk |
| 23:00 Asleep | 18:00 Late |
Questions
Questions people ask
What is the time difference between London and New York?
New York is 5h behind London (as of Wed, 21 Oct 2026). That changes on Sun, 25 Oct 2026, when London's clocks go back: then New York is 4h behind London.
What is the best time for a call between London and New York?
On a working day, the best time for a call is 14:00–15:00 in London (09:00–10:00 in New York) until 24 Oct 2026 and from 1 Nov 2026 to 13 Mar 2027 and from 28 Mar 2027, and 13:00–14:00 in London (09:00–10:00 in New York) from 25 Oct 2026 to 31 Oct 2026 and from 14 Mar 2027 to 27 Mar 2027.
Does London change its clocks?
Yes. London moves its clocks back an hour on Sun, 25 Oct 2026, and forward an hour on Sun, 28 Mar 2027.
Does New York change its clocks?
Yes. New York moves its clocks back an hour on Sun, 1 Nov 2026, and forward an hour on Sun, 14 Mar 2027.
More city pairs
Compare more cities
London and…
- London and Mumbai
- London and Delhi
- London and Bengaluru
- London and Dubai
- London and Abu Dhabi
- London and Riyadh
- London and Doha
- London and Singapore
- London and Hong Kong
- London and Tokyo
- London and Sydney
- London and Paris
- London and Berlin
- London and Amsterdam
- London and Toronto
- London and Chicago
- London and Los Angeles
- London and San Francisco
New York and…
- New York and Mumbai
- New York and Delhi
- New York and Bengaluru
- New York and Dubai
- New York and Abu Dhabi
- New York and Riyadh
- New York and Doha
- New York and Singapore
- New York and Hong Kong
- New York and Tokyo
- New York and Sydney
- New York and Paris
- New York and Berlin
- New York and Amsterdam
- New York and Toronto
- New York and Chicago
- New York and Los Angeles
- New York and San Francisco
From the team behind 10:10
Running an event across time zones?
C4E has spent twenty years running conferences, dealer meets and offsites in more than 40 countries, with clients, speakers and crews in different time zones. 10:10 is one of the tools we built for our own shows. It is free, with no account and nothing upsold.