JST to London Time Converter
GMT is 9 hours behind JST. 9:00 AM JST = 12:00 AM GMT.
GMT is 9 hours behind JST at the moment. To convert JST to London Time, subtract 9 hours from the JST time: 9:00 AM JST = 12:00 AM GMT.
JST (Japan Time) is used in Japan. London Time (London time) is used in London, UK.
JST to London Time time conversion table
JST to London Time on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| JST | London Time | Day |
|---|---|---|
| 12:00 AM JST | 3:00 PM GMT | previous day |
| 1:00 AM JST | 4:00 PM GMT | previous day |
| 2:00 AM JST | 5:00 PM GMT | previous day |
| 3:00 AM JST | 6:00 PM GMT | previous day |
| 4:00 AM JST | 7:00 PM GMT | previous day |
| 5:00 AM JST | 8:00 PM GMT | previous day |
| 6:00 AM JST | 9:00 PM GMT | previous day |
| 7:00 AM JST | 10:00 PM GMT | previous day |
| 8:00 AM JST | 11:00 PM GMT | previous day |
| 9:00 AM JST | 12:00 AM GMT | night |
| 10:00 AM JST | 1:00 AM GMT | night |
| 11:00 AM JST | 2:00 AM GMT | night |
| 12:00 PM JST | 3:00 AM GMT | night |
| 1:00 PM JST | 4:00 AM GMT | night |
| 2:00 PM JST | 5:00 AM GMT | night |
| 3:00 PM JST | 6:00 AM GMT | — |
| 4:00 PM JST | 7:00 AM GMT | — |
| 5:00 PM JST | 8:00 AM GMT | — |
| 6:00 PM JST | 9:00 AM GMT | — |
| 7:00 PM JST | 10:00 AM GMT | — |
| 8:00 PM JST | 11:00 AM GMT | — |
| 9:00 PM JST | 12:00 PM GMT | — |
| 10:00 PM JST | 1:00 PM GMT | — |
| 11:00 PM JST | 2:00 PM GMT | — |
- Work rows — 9 AM–5 PM in both places
- Night in the destination (10 PM–6 AM)
How to convert JST to London Time
Subtract 9 hours from the JST time to get London Time.
Example: 9:00 AM JST = 12:00 AM GMT.
Across midnight: 1:00 AM JST = 4:00 PM GMT (previous day). The date changes, so always check the day as well as the hour.
Time difference between JST and London Time
The time difference between JST and London Time is not the same all year, because the two sides change for daylight saving time on different dates. In 2026 it works out like this:
- 1 Jan 2026 – 28 Mar 2026: London Time is 9 hours behind of JST.
- 29 Mar 2026 – 24 Oct 2026: London Time is 8 hours behind of JST.
- 25 Oct 2026 – 31 Dec 2026: London Time is 9 hours behind of JST.
JST and London Time during daylight saving time
- JST does not observe daylight saving time; it stays on UTC+9 all year.
- London Time next changes on 28 Mar 2027: clocks go forward one hour at 00:59 local time, from GMT (UTC+0) to BST (UTC+1).
Best time for a meeting between JST and London Time
JST and London Time have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM JST, which is 10:00 PM GMT.
JST to London Time FAQ
What is the time difference between JST and London Time?
Right now GMT is 9 hours behind JST. The gap changes 3 times in 2026 because the two sides switch to daylight saving time on different dates.
What is 9 AM JST in London Time?
9:00 AM JST is 12:00 AM GMT.
What is 12 PM (noon) JST in London Time?
12:00 PM JST is 3:00 AM GMT.
Is London Time ahead of or behind JST?
GMT is 9 hours behind JST, so it is earlier in London Time than in JST.
Does JST change for daylight saving time?
No. JST stays on the same offset all year, so conversions never shift for daylight saving time.
Does London Time change for daylight saving time?
Yes. London Time next changes on 28 Mar 2027, when clocks go forward one hour from GMT to BST.
What is the best time for a meeting between JST and London Time?
JST and London Time have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM JST, which is 10:00 PM GMT.
Related conversions
Convert London Time to JST
Convert JST to other time zones
Convert other time zones to London Time
Learn more
Updated 7 November 2026. Time zone data: IANA tz database.