Time difference calculator

Choose two cities and a date to see exactly how many hours apart they are. The date matters: daylight saving can change the gap by an hour for weeks at a time.

FromToDate

London is 5h ahead of New York

New York: UTC-5 · London: UTC+0

Why the gap changes during the year

Countries switch to daylight saving on different dates, and many never switch at all. New York and London, for example, are usually five hours apart but only four for a few weeks each spring and autumn. Checking the specific date avoids missed calls.

Planning a call? Use the meeting planner or read how to schedule across time zones.