Time zones
Pick two places and a time, and see what the clock says in the other one.
The time in New York
16:17
4 October 2026
Same day.
- DifferenceNew York is 5 hours behind London
- From GreenwichLondon +01:00 · New York −04:00
The same instant elsewhere
| Place | Time | UTC |
|---|---|---|
| Los Angeles | 13:17 | −07:00 |
| New York | 16:17 | −04:00 |
| London | 21:17 | +01:00 |
| Paris | 22:17 | +02:00 |
| Cairo | 23:17 | +03:00 |
| New Delhi | 01:47+1 | +05:30 |
| Hong Kong | 04:17+1 | +08:00 |
| Sydney | 07:17+1 | +11:00 |
The offset applies to the chosen date. A plus or minus beside a time means the date there is different.
How it works
The conversion goes through the time zone database rather than fixed hour offsets. That means summer time, half-hour zones and countries that have moved their zone are all handled correctly, even for a date far in the future or the past.
The difference between two places is not constant. Europe and the United States change their clocks in different weeks in March, and during those weeks London is four hours ahead of New York instead of five.
Not every zone sits on a whole hour. India is five and a half hours ahead of Greenwich, Nepal is three quarters past the hour, and a few Pacific islands run fourteen hours ahead.
In the southern hemisphere summer time runs the other way. Sydney is eleven hours ahead of Greenwich in January and ten in July.
On the night the clocks go forward there is an hour that never happens. Choose a time inside it and you get the instant immediately after the change, which is what the browser calendar does too.
The right-hand column shows the offset from Greenwich on that particular day, and a small plus or minus beside a time means the date there is different.