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JST to UK time converter
London is 8 hours behind Japan for 210 days of 2026, and 9 hours behind for the other 155 days, because daylight saving changes the gap.
JST to UK conversion table
Local time in Japan and the matching time in London on two reference dates, one in winter and one in summer for the northern hemisphere.
| Japan (JST) | London on 15 January | London on 15 July |
|---|---|---|
| 08:00 | 23:00 (-1 day) | 00:00 |
| 09:00 | 00:00 | 01:00 |
| 10:00 | 01:00 | 02:00 |
| 12:00 | 03:00 | 04:00 |
| 15:00 | 06:00 | 07:00 |
| 17:00 | 08:00 | 09:00 |
| 18:00 | 09:00 | 10:00 |
| 21:00 | 12:00 | 13:00 |
Best meeting times between Japan and London
- January: No overlap inside both working days. The closest flexible hours (07:00-21:00): 16:00-21:00 JST = 07:00-12:00 UK.
- July: No overlap inside both working days. The closest flexible hours (07:00-21:00): 15:00-21:00 JST = 07:00-13:00 UK.
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 UK
- Japan does not change its clocks in 2026.
- London moves its clocks forward on 29 March and back on 25 October in 2026.
- The gap is 8 hours for 210 days and 9 hours for 155 days of 2026.
About the two zones
Japan. Japan Standard Time is UTC+9 all year with no daylight saving.
London. The UK is on GMT (UTC+0) in winter and British Summer Time (UTC+1) from the last Sunday of March to the last Sunday of October.
Frequently asked questions
What time is 9 AM JST in UK?
On 15 January, 09:00 in Japan is 00:00 in London. On 15 July it is 01:00.
What is the time difference between Japan and London?
London is 8 hours behind Japan for 210 days of 2026, and 9 hours behind for the other 155 days, because daylight saving changes the gap.
Does the time difference between JST and UK change during the year?
Yes. London changes its clocks and Japan does not, so the gap moves between 8 and 9 hours. Always convert with the actual date.
When is the best time for a meeting between Japan and London?
No overlap inside both working days. The closest flexible hours (07:00-21:00): 16:00-21:00 JST = 07:00-12:00 UK. In July: No overlap inside both working days. The closest flexible hours (07:00-21:00): 15:00-21:00 JST = 07:00-13:00 UK.
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.