JST to Belfast 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 Belfast Time, subtract 9 hours from the JST time: 9:00 AM JST = 12:00 AM GMT.
JST (Japan Time) is used in Japan. Belfast Time (Belfast time) is used in Belfast, UK.
JST to Belfast Time time conversion table
JST to Belfast Time on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| JST | Belfast 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 Belfast Time
Subtract 9 hours from the JST time to get Belfast 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 Belfast Time
The time difference between JST and Belfast 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: Belfast Time is 9 hours behind of JST.
- 29 Mar 2026 – 24 Oct 2026: Belfast Time is 8 hours behind of JST.
- 25 Oct 2026 – 31 Dec 2026: Belfast Time is 9 hours behind of JST.
JST and Belfast Time during daylight saving time
- JST does not observe daylight saving time; it stays on UTC+9 all year.
- Belfast 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 Belfast Time
JST and Belfast 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 Belfast Time FAQ
What is the time difference between JST and Belfast 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 Belfast Time?
9:00 AM JST is 12:00 AM GMT.
What is 12 PM (noon) JST in Belfast Time?
12:00 PM JST is 3:00 AM GMT.
Is Belfast Time ahead of or behind JST?
GMT is 9 hours behind JST, so it is earlier in Belfast 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 Belfast Time change for daylight saving time?
Yes. Belfast 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 Belfast Time?
JST and Belfast 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 Belfast Time to JST
Convert JST to other time zones
Convert other time zones to Belfast Time
Learn more
Updated 7 November 2026. Time zone data: IANA tz database.