GMT to JST Converter
JST is 9 hours ahead of GMT. 9:00 AM GMT = 6:00 PM JST.
JST is 9 hours ahead of GMT. To convert GMT to JST, add 9 hours to the GMT time: 9:00 AM GMT = 6:00 PM JST.
GMT (GMT) is used in Same offset as UTC. The UK and Ireland use GMT in winter; Iceland, Ghana and Senegal all year. JST (Japan Time) is used in Japan.
The UK is on GMT only in winter; in summer it uses BST (UTC+1).
GMT to JST time conversion table
GMT to JST on 6 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| GMT | JST | Day |
|---|---|---|
| 12:00 AM GMT | 9:00 AM JST | — |
| 1:00 AM GMT | 10:00 AM JST | — |
| 2:00 AM GMT | 11:00 AM JST | — |
| 3:00 AM GMT | 12:00 PM JST | — |
| 4:00 AM GMT | 1:00 PM JST | — |
| 5:00 AM GMT | 2:00 PM JST | — |
| 6:00 AM GMT | 3:00 PM JST | — |
| 7:00 AM GMT | 4:00 PM JST | — |
| 8:00 AM GMT | 5:00 PM JST | — |
| 9:00 AM GMT | 6:00 PM JST | — |
| 10:00 AM GMT | 7:00 PM JST | — |
| 11:00 AM GMT | 8:00 PM JST | — |
| 12:00 PM GMT | 9:00 PM JST | — |
| 1:00 PM GMT | 10:00 PM JST | night |
| 2:00 PM GMT | 11:00 PM JST | night |
| 3:00 PM GMT | 12:00 AM JST | next day |
| 4:00 PM GMT | 1:00 AM JST | next day |
| 5:00 PM GMT | 2:00 AM JST | next day |
| 6:00 PM GMT | 3:00 AM JST | next day |
| 7:00 PM GMT | 4:00 AM JST | next day |
| 8:00 PM GMT | 5:00 AM JST | next day |
| 9:00 PM GMT | 6:00 AM JST | next day |
| 10:00 PM GMT | 7:00 AM JST | next day |
| 11:00 PM GMT | 8:00 AM JST | next day |
- Work rows — 9 AM–5 PM in both places
- Night in the destination (10 PM–6 AM)
How to convert GMT to JST
Add 9 hours to the GMT time to get JST.
Example: 9:00 AM GMT = 6:00 PM JST.
Across midnight: 10:00 PM GMT = 7:00 AM JST (next day). The date changes, so always check the day as well as the hour.
Time difference between GMT and JST
The time difference between GMT and JST is 9 hours all year – JST is ahead of GMT.
GMT and JST during daylight saving time
- GMT does not observe daylight saving time; it stays on UTC+0 all year.
- JST does not observe daylight saving time; it stays on UTC+9 all year.
Best time for a meeting between GMT and JST
GMT and JST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM GMT, which is 4:00 PM JST.
GMT to JST FAQ
What is the time difference between GMT and JST?
JST is 9 hours ahead of GMT all year. 9:00 AM GMT = 6:00 PM JST.
What is 9 AM GMT in JST?
9:00 AM GMT is 6:00 PM JST.
What is 12 PM (noon) GMT in JST?
12:00 PM GMT is 9:00 PM JST.
Is JST ahead of or behind GMT?
JST is 9 hours ahead of GMT, so it is later in JST than in GMT.
Does GMT change for daylight saving time?
No. GMT stays on the same offset all year, so conversions never shift for daylight saving time.
Does JST change for daylight saving time?
No. JST stays on the same offset all year, so conversions never shift for daylight saving time.
What is the best time for a meeting between GMT and JST?
GMT and JST have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 7:00 AM GMT, which is 4:00 PM JST.
Related conversions
Convert JST to GMT
Convert GMT to other time zones
Convert other time zones to JST
Learn more
Updated 6 November 2026. Time zone data: IANA tz database.