The time in Tokyo

A live clock for Tokyo in Japan, with the offset it is on right now, whether that is summer time, and the exact date it next moves.

Tokyo across the year

Tokyo stays on UTC+9 all year and does not change its clocks for daylight saving.

Worth knowing

Japan has not observed daylight saving since 1951, so the offset from Tokyo to anywhere that does moves twice a year without Tokyo doing anything at all.

Questions

Where do the time zones come from?

From the IANA time-zone database, through your own browser and our build runtime rather than a list we typed out. This build was made against tzdata 2025b, which names 418 zones. We show that version because a stale time-zone database is a wrong answer that looks completely right.

Why does the difference between two time zones change during the year?

Because countries change their clocks on different dates. The United States moves in March and November, the European Union in the last weekends of March and October, and the southern hemisphere moves the opposite way entirely. For a few weeks each year the usual gap is an hour out, which is when most mis-scheduled calls happen.