GMT/BST to JST time converter
JST is 8 hours ahead of GMT/BST. When it is 9:00 AM in GMT/BST, it is 5:00 PM in JST.
10:18 PM in GMT/BST, Friday, October 16, 2026
Shared working hours (9:00–18:00)
GMT/BST to JST conversion table
Every hour of today in GMT/BST and the matching time in JST. Light rows are typical working hours (9:00–18:00).
| GMT/BST | JST |
|---|---|
| 12:00 AM | 8:00 AM |
| 1:00 AM | 9:00 AM |
| 2:00 AM | 10:00 AM |
| 3:00 AM | 11:00 AM |
| 4:00 AM | 12:00 PM |
| 5:00 AM | 1:00 PM |
| 6:00 AM | 2:00 PM |
| 7:00 AM | 3:00 PM |
| 8:00 AM | 4:00 PM |
| 9:00 AM | 5:00 PM |
| 10:00 AM | 6:00 PM |
| 11:00 AM | 7:00 PM |
| 12:00 PM | 8:00 PM |
| 1:00 PM | 9:00 PM |
| 2:00 PM | 10:00 PM |
| 3:00 PM | 11:00 PM |
| 4:00 PM | 12:00 AM+1 day |
| 5:00 PM | 1:00 AM+1 day |
| 6:00 PM | 2:00 AM+1 day |
| 7:00 PM | 3:00 AM+1 day |
| 8:00 PM | 4:00 AM+1 day |
| 9:00 PM | 5:00 AM+1 day |
| 10:00 PM | 6:00 AM+1 day |
| 11:00 PM | 7:00 AM+1 day |
Best time to call or meet
Both sides are at work from 9:00 AM – 10:00 AM in GMT/BST (5:00 PM – 6:00 PM in JST).
Daylight saving time and the difference
The difference changes during the year because GMT/BST and JST switch clocks on different dates:
- Oct 16, 2026 – Oct 25, 2026: +8h
- Oct 25, 2026 – Mar 28, 2027: +9h
- Mar 28, 2027 – Oct 16, 2027: +8h
More conversions
Questions and answers
What is the time difference between GMT/BST and JST?
JST is 8 hours ahead of GMT/BST.
What time is it in JST when it is 9 AM in GMT/BST?
When it is 9:00 AM in GMT/BST, it is 5:00 PM in JST.
When is the best time to call JST from GMT/BST?
Both sides are at work from 9:00 AM – 10:00 AM in GMT/BST (5:00 PM – 6:00 PM in JST).
Does the time difference between GMT/BST and JST change?
Yes, for part of the year, because daylight saving time starts and ends on different dates or applies on one side only.