🇬🇧GMT→🇯🇵JST
GMT to JST Timezone Converter
Greenwich Mean Time (UTC+0) is 9 hours behind Japan Standard Time (UTC+9). No standard working-hours overlap - see stretch and async options.
GMT
UTC+0
Greenwich Mean Time
Difference
9h
GMT is 9h behind
JST
UTC+9
Japan Standard Time
GMT Working Hours in JST
Standard working hours (9 am – 6 pm) in GMT and the equivalent time.
| 🇬🇧 London (GMT) | 🇯🇵 Tokyo (JST) | Status |
|---|---|---|
| 9:00 am | 6:00 pm | Stretch |
| 10:00 am | 7:00 pm | Stretch |
| 11:00 am | 8:00 pm | Stretch |
| 12:00 pm | 9:00 pm | Stretch |
| 1:00 pm | 10:00 pm | Off hours |
| 2:00 pm | 11:00 pm | Off hours |
| 3:00 pm | 12:00 am | Off hours |
| 4:00 pm | 1:00 am | Off hours |
| 5:00 pm | 2:00 am | Off hours |
| 6:00 pm | 3:00 am | Off hours |
Frequently Asked Questions
What is the difference between GMT and JST?
GMT is UTC+0 and JST is UTC+9. The difference is 9 hours.
Does GMT observe daylight saving time?
Some timezone abbreviations like GMT refer to standard time only. During daylight saving periods, the actual offset may change by 1 hour. The Timezone Meeting Planner handles DST automatically using your browser's timezone data.
What is the best meeting time for GMT and JST?
There is no standard working-hours overlap between GMT and JST. Consider early morning in one zone or async communication.