JST to GMT Time Converter
Compare JST and GMT instantly. The clocks below stay in sync with the IANA time-zone database, so daylight-saving transitions are handled automatically for both Tokyo and GMT.
24-Hour Comparison Timeline
Green = working hours · Yellow = early/late · Red = night
24-hour reference table
| JST (Tokyo) | GMT (GMT) |
|---|---|
| 12:00 AM | 03:00 PM(Fri, Jul 24) |
| 01:00 AM | 04:00 PM(Fri, Jul 24) |
| 02:00 AM | 05:00 PM(Fri, Jul 24) |
| 03:00 AM | 06:00 PM(Fri, Jul 24) |
| 04:00 AM | 07:00 PM(Fri, Jul 24) |
| 05:00 AM | 08:00 PM(Fri, Jul 24) |
| 06:00 AM | 09:00 PM(Fri, Jul 24) |
| 07:00 AM | 10:00 PM(Fri, Jul 24) |
| 08:00 AM | 11:00 PM(Fri, Jul 24) |
| 09:00 AM | 12:00 AM |
| 10:00 AM | 01:00 AM |
| 11:00 AM | 02:00 AM |
| 12:00 PM | 03:00 AM |
| 01:00 PM | 04:00 AM |
| 02:00 PM | 05:00 AM |
| 03:00 PM | 06:00 AM |
| 04:00 PM | 07:00 AM |
| 05:00 PM | 08:00 AM |
| 06:00 PM | 09:00 AM |
| 07:00 PM | 10:00 AM |
| 08:00 PM | 11:00 AM |
| 09:00 PM | 12:00 PM |
| 10:00 PM | 01:00 PM |
| 11:00 PM | 02:00 PM |
Daylight saving time
Neither Tokyo nor GMT observes daylight saving time — the offset between JST and GMT is fixed year-round.
Working-hours overlap
Standard 9-to-5 hours in Tokyo and GMT do not overlap. Use an early or late slot on one side.
Frequently asked questions
What is the time difference between JST and GMT?+
GMT (UTC+00:00) is currently 9 hours behind JST (UTC+09:00). This page recalculates the offset live from the IANA time-zone database, including any daylight-saving transitions.
Does JST or GMT observe daylight saving time?+
Neither Tokyo nor GMT observes daylight saving time, so the offset stays fixed all year. Times on this page always reflect the current local rules.
What are the best meeting hours between Tokyo and GMT?+
Standard 9–5 working hours in Tokyo and GMT do not overlap. Pick an early or late slot for one side, or use the 24-hour table above to find a time that works.
How do I quickly convert JST to GMT?+
Use the live clocks and 24-hour reference table above. Pick any hour on the JST row to see the matching GMT time. The Event Planner also lets you pick a specific date and share it with attendees.