GMT to JST Time Converter
Convert Greenwich Mean Time to Japan Standard Time instantly.
Scroll the timeline to check any hour of the day.
Greenwich Mean Time
GMT
6:06
Japan Standard Time
JST
3:06
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How the GMT to JST time difference works
JST is 9 hours ahead of GMT. Greenwich Mean Time (GMT) is the fixed UTC+0 reference time, used by the United Kingdom and Ireland in winter. Japan Standard Time (JST) is the time zone of Japan. For example, 9:00 AM GMT is 6:00 PM JST. Scroll the timeline above to convert any moment, or use the chart below for a quick reference.
Time difference
9 hours
Daylight saving
Neither
GMT offset
UTC+0
JST offset
UTC+9
GMT to JST conversion chart
| Greenwich Mean Time (GMT) | Japan Standard Time (JST) |
|---|---|
| 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 | 12:00 AM +1 day |
| 4:00 PM | 1:00 AM +1 day |
| 5:00 PM | 2:00 AM +1 day |
| 6:00 PM | 3:00 AM +1 day |
| 7:00 PM | 4:00 AM +1 day |
| 8:00 PM | 5:00 AM +1 day |
| 9:00 PM | 6:00 AM +1 day |
| 10:00 PM | 7:00 AM +1 day |
| 11:00 PM | 8:00 AM +1 day |
Cities in each time zone
Greenwich Mean Time (GMT)
LondonDublinLisbonEdinburghManchester
Japan Standard Time (JST)
TokyoOsakaYokohamaNagoyaSapporo
GMT to JST questions
Is JST ahead of or behind GMT?
JST is 9 hours ahead of GMT. So 9:00 AM GMT is 6:00 PM JST, and 5:00 PM GMT is 2:00 AM JST.
What time is it in JST when it is 12:00 PM GMT?
When it is 12:00 PM (noon) GMT in Greenwich Mean Time, it is 9:00 PM JST in Japan Standard Time.
How many hours difference is there between GMT and JST?
There is a 9 hours difference. Japan Standard Time (JST) runs 9 hours ahead of Greenwich Mean Time (GMT).
Do GMT and JST observe daylight saving time?
Neither Greenwich Mean Time nor Japan Standard Time shifts its clocks for daylight saving time, so the 9 hours difference between them is the same all year. The United Kingdom and Ireland use GMT only in winter; from late March to late October they switch to British Summer Time (BST), one hour ahead of GMT.
What is the best time to schedule a meeting between GMT and JST?
A standard 9-to-5 workday in Greenwich Mean Time and Japan Standard Time does not overlap, so pick the early morning in the later zone or the late evening in the earlier zone.
Which cities use GMT and JST?
Greenwich Mean Time (GMT) covers cities such as London, Dublin, Lisbon, Edinburgh, Manchester. Japan Standard Time (JST) covers cities such as Tokyo, Osaka, Yokohama, Nagoya, Sapporo.