JST to UTC

JST is UTC+9 and UTC is UTC+0 today — UTC is 9 hours behind JST. Abbreviations are for reading: this page resolves JST to Asia/Tokyo and UTC to UTC, which are the names that do not go ambiguous.

The working day, side by side

The working days do not meet at all. Current abbreviations: JST and UTC+0.

JST and UTC hour by hour, with the working-hour overlap shaded
City	00:00 in JST	01:00 in JST	02:00 in JST	03:00 in JST	04:00 in JST	05:00 in JST	06:00 in JST	07:00 in JST	08:00 in JST	09:00 in JST	10:00 in JST	11:00 in JST	12:00 in JST	13:00 in JST	14:00 in JST	15:00 in JST	16:00 in JST	17:00 in JST	18:00 in JST	19:00 in JST	20:00 in JST	21:00 in JST	22:00 in JST	23:00 in JST
JST——	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23
UTC——	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23

Working hours
Shoulder
Night
Overlap

Do more with JST and UTC

Open in the PlannerAdd more cities or zones, find a meeting time that works for everyone, then share it as a link.Open in Watch ViewKeep JST, UTC and other zones on screen as live clocks, under an animated sky and sun.

Common questions

What is JST in UTC?

UTC is 9 hours behind JST today: noon in JST is 03:00 in UTC.

Is JST the same all year?

JST refers to the offset used by Asia/Tokyo. Where that zone observes daylight saving, the letters change with it, which is why this site stores the identifier and not the abbreviation.

When can JST and UTC meet?

They do not overlap during working hours. 17:00–18:00 your time (08:00 there) is the cheapest compromise.