JST to GMT/BST time converter
GMT/BST is 8 hours behind JST. When it is 9:00 AM in JST, it is 1:00 AM in GMT/BST.
6:18 AM in JST, Saturday, October 17, 2026
Shared working hours (9:00–18:00)
JST to GMT/BST conversion table
Every hour of today in JST and the matching time in GMT/BST. Light rows are typical working hours (9:00–18:00).
| JST | GMT/BST |
|---|---|
| 12:00 AM | 4:00 PM−1 day |
| 1:00 AM | 5:00 PM−1 day |
| 2:00 AM | 6:00 PM−1 day |
| 3:00 AM | 7:00 PM−1 day |
| 4:00 AM | 8:00 PM−1 day |
| 5:00 AM | 9:00 PM−1 day |
| 6:00 AM | 10:00 PM−1 day |
| 7:00 AM | 11:00 PM−1 day |
| 8:00 AM | 12:00 AM |
| 9:00 AM | 1:00 AM |
| 10:00 AM | 2:00 AM |
| 11:00 AM | 3:00 AM |
| 12:00 PM | 4:00 AM |
| 1:00 PM | 5:00 AM |
| 2:00 PM | 6:00 AM |
| 3:00 PM | 7:00 AM |
| 4:00 PM | 8:00 AM |
| 5:00 PM | 9:00 AM |
| 6:00 PM | 10:00 AM |
| 7:00 PM | 11:00 AM |
| 8:00 PM | 12:00 PM |
| 9:00 PM | 1:00 PM |
| 10:00 PM | 2:00 PM |
| 11:00 PM | 3:00 PM |
Best time to call or meet
Both sides are at work from 5:00 PM – 6:00 PM in JST (9:00 AM – 10:00 AM in GMT/BST).
Daylight saving time and the difference
The difference changes during the year because JST and GMT/BST switch clocks on different dates:
- Oct 17, 2026 – Oct 25, 2026: -8h
- Oct 25, 2026 – Mar 28, 2027: -9h
- Mar 28, 2027 – Oct 17, 2027: -8h
More conversions
Questions and answers
What is the time difference between JST and GMT/BST?
GMT/BST is 8 hours behind JST.
What time is it in GMT/BST when it is 9 AM in JST?
When it is 9:00 AM in JST, it is 1:00 AM in GMT/BST.
When is the best time to call GMT/BST from JST?
Both sides are at work from 5:00 PM – 6:00 PM in JST (9:00 AM – 10:00 AM in GMT/BST).
Does the time difference between JST and GMT/BST change?
Yes, for part of the year, because daylight saving time starts and ends on different dates or applies on one side only.