JST to Southampton 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 Southampton Time, subtract 9 hours from the JST time: 9:00 AM JST = 12:00 AM GMT.
JST (Japan Time) is used in Japan. Southampton Time (Southampton time) is used in Southampton, UK.
JST to Southampton Time time conversion table
JST to Southampton Time on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| JST | Southampton Time |
|---|---|
| 12:00 AM | 3:00 PM−1 |
| 1:00 AM | 4:00 PM−1 |
| 2:00 AM | 5:00 PM−1 |
| 3:00 AM | 6:00 PM−1 |
| 4:00 AM | 7:00 PM−1 |
| 5:00 AM | 8:00 PM−1 |
| 6:00 AM | 9:00 PM−1 |
| 7:00 AM | 10:00 PM−1 |
| JST | Southampton Time |
|---|---|
| 8:00 AM | 11:00 PM−1 |
| 9:00 AM | 12:00 AM |
| 10:00 AM | 1:00 AM |
| 11:00 AM | 2:00 AM |
| 12:00 PM | 3:00 AM |
| 1:00 PM | 4:00 AM |
| 2:00 PM | 5:00 AM |
| 3:00 PM | 6:00 AM |
| JST | Southampton Time |
|---|---|
| 4:00 PM | 7:00 AM |
| 5:00 PM | 8:00 AM |
| 6:00 PM | 9:00 AM |
| 7:00 PM | 10:00 AM |
| 8:00 PM | 11:00 AM |
| 9:00 PM | 12:00 PM |
| 10:00 PM | 1:00 PM |
| 11:00 PM | 2:00 PM |
Conversion table from JST to Southampton Time for 7 Nov 2026. A tick marks hours that fall between 9 AM and 5 PM in both places. +1 means the next day in Southampton Time, −1 the previous day.
- ✓ marks 9 AM–5 PM in both places
- Greyed times are night in the destination (10 PM–6 AM)
How to convert JST to Southampton Time
Subtract 9 hours from the JST time to get Southampton 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 Southampton Time
The time difference between JST and Southampton 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: Southampton Time is 9 hours behind of JST.
- 29 Mar 2026 – 24 Oct 2026: Southampton Time is 8 hours behind of JST.
- 25 Oct 2026 – 31 Dec 2026: Southampton Time is 9 hours behind of JST.
JST and Southampton Time during daylight saving time
- JST does not observe daylight saving time; it stays on UTC+9 all year.
- Southampton 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 Southampton Time
JST and Southampton 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 Southampton Time FAQ
What is the time difference between JST and Southampton 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 Southampton Time?
9:00 AM JST is 12:00 AM GMT.
What is 12 PM (noon) JST in Southampton Time?
12:00 PM JST is 3:00 AM GMT.
Is Southampton Time ahead of or behind JST?
GMT is 9 hours behind JST, so it is earlier in Southampton 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 Southampton Time change for daylight saving time?
Yes. Southampton 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 Southampton Time?
JST and Southampton 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 Southampton Time to JST
Convert JST to other time zones
Convert other time zones to Southampton Time
Learn more
Updated 7 November 2026. Time zone data: IANA tz database.