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JST to UTC time converter
UTC is 9 hours behind Japan all year.
JST to UTC conversion table
Local time in Japan and the matching time in UTC on two reference dates, one in winter and one in summer for the northern hemisphere.
| Japan (JST) | UTC on 15 January | UTC on 15 July |
|---|---|---|
| 08:00 | 23:00 (-1 day) | 23:00 (-1 day) |
| 09:00 | 00:00 | 00:00 |
| 10:00 | 01:00 | 01:00 |
| 12:00 | 03:00 | 03:00 |
| 15:00 | 06:00 | 06:00 |
| 17:00 | 08:00 | 08:00 |
| 18:00 | 09:00 | 09:00 |
| 21:00 | 12:00 | 12:00 |
Best meeting times between Japan and UTC
- January: No overlap inside both working days. The closest flexible hours (07:00-21:00): 16:00-21:00 JST = 07:00-12:00 UTC.
- July: No overlap inside both working days. The closest flexible hours (07:00-21:00): 16:00-21:00 JST = 07:00-12:00 UTC.
Want to add more people? The meeting planner starts with these two zones and lets you add up to four more.
Daylight saving between JST and UTC
- Japan does not change its clocks in 2026.
- UTC does not change its clocks in 2026.
About the two zones
Japan. Japan Standard Time is UTC+9 all year with no daylight saving.
UTC. UTC is the reference all other zones are measured from. It never changes for daylight saving, which is why servers, logs and schedules are best kept in UTC.
Frequently asked questions
What time is 9 AM JST in UTC?
On 15 January, 09:00 in Japan is 00:00 in UTC. On 15 July it is 00:00.
What is the time difference between Japan and UTC?
UTC is 9 hours behind Japan all year.
Does the time difference between JST and UTC change during the year?
No. Neither zone changes its clocks in a way that alters the gap, so the difference stays at 9 hours.
When is the best time for a meeting between Japan and UTC?
No overlap inside both working days. The closest flexible hours (07:00-21:00): 16:00-21:00 JST = 07:00-12:00 UTC. In July: No overlap inside both working days. The closest flexible hours (07:00-21:00): 16:00-21:00 JST = 07:00-12:00 UTC.
More conversions
Need the time in a scheduler? Convert a local-time cron schedule to UTC, or see which jobs a clock change affects with the DST collision simulator.