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DateAlmanac

What is GMT in JST?

Japan Standard Time is 9 hours ahead

Greenwich Mean Time is on UTC+0:00 and Japan Standard Time is on UTC+9:00 right now. That gap holds all year, because neither zone observes daylight saving.

Convert a time

JST — Japan Standard Time

5:00 pm

JST, Sat

Time in Greenwich
8:29:19 AM
Time in Tokyo
5:29:19 PM
Difference
+9 h
Next clock change
Neither zone

Daylight saving

Greenwich Mean Time

No clock changes

Greenwich Mean Time stays on GMT all year, so its offset from UTC never moves.

Japan Standard Time

No clock changes

Japan Standard Time stays on JST all year, so its offset from UTC never moves.

GMT to JST conversion table

Every hour of Saturday, November 7, 2026, converted from Greenwich Mean Time to Japan Standard Time. 9 of the 24 hours fall on a different calendar day in Tokyo, which is marked.

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
2:00 pm GMT
11:00 pm JST
3:00 pm GMT
12:00 am JST+1 day
4:00 pm GMT
1:00 am JST+1 day
5:00 pm GMT
2:00 am JST+1 day
6:00 pm GMT
3:00 am JST+1 day
7:00 pm GMT
4:00 am JST+1 day
8:00 pm GMT
5:00 am JST+1 day
9:00 pm GMT
6:00 am JST+1 day
10:00 pm GMT
7:00 am JST+1 day
11:00 pm GMT
8:00 am JST+1 day

Scheduling between the two

There is no overlap between a nine-to-six working day in Greenwich and one in Tokyo — the gap is too wide. A call has to sit early or late for one side. Early morning in Greenwich is the usual compromise, since that is late afternoon or evening in Tokyo.

Greenwich Mean Time (GMT) is used in as a fixed UTC+0 offset. Note that the UK itself leaves GMT every summer — see British Time below.

Other conversions