JST to GMT
JST is UTC+9 and GMT is UTC+1 today — GMT is 8 hours behind JST. Abbreviations are for reading: this page resolves JST to Asia/Tokyo and GMT to Europe/London, which are the names that do not go ambiguous.
GMT: London in winter; British Summer Time in summer.
The working day, side by side
Hours shaded in both rows are inside working hours on both sides. Current abbreviations: JST and BST.
| 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 |
| GMT—— | 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 GMT
Common questions
What is JST in GMT?
GMT is 8 hours behind JST today: noon in JST is 04:00 in GMT.
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 GMT meet?
Working hours overlap for 1 hour a day: the shaded overlap is 09:00–10:00 in GMT (17:00–18:00 your time).