4 AM GMT to JST
Greenwich Mean Time → Japan Standard Time
Partial overlap
GMT
4 AM
UTC+1
=
JST
12 PM
UTC+9
4 AM GMT (Greenwich Mean Time) equals 12 PM JST (Japan Standard Time). This is a common time for meetings across time zones.
Live — GMT
03:09:15
Tuesday, May 12
UTC+1
DST activeLive — JST
11:09:15
Tuesday, May 12
UTC+9
Daylight Saving Time (DST)
- GMT (Greenwich Mean Time) observes DST — currently active (clocks are +1h ahead).
- DST transitions may shift this offset by ±1 hour twice per year.
24-Hour Comparison — GMT to JST
Click any row to jump to that hour's page.
12 AM6 AM12 PM6 PM11 PM
GMTJSTDayMeeting
12 AM
8 AM
–
Early/Late
1 AM
9 AM
–
Early/Late
2 AM
10 AM
–
Early/Late
3 AM
11 AM
–
Early/Late
4 AMthis
12 PM
–
Early/Late
5 AM
1 PM
–
Early/Late
6 AM
2 PM
–
Early/Late
7 AM
3 PM
–
Early/Late
8 AM
4 PM
–
Good
9 AM
5 PM
–
Good
10 AM
6 PM
–
Good
11 AM
7 PM
–
Early/Late
12 PM
8 PM
–
Early/Late
1 PM
9 PM
–
Early/Late
2 PM
10 PM
–
Early/Late
3 PM
11 PM
–
Early/Late
4 PM
12 AM
+1d
Early/Late
5 PM
1 AM
+1d
Early/Late
6 PM
2 AM
+1d
Early/Late
7 PM
3 AM
+1d
Off hours
8 PM
4 AM
+1d
Off hours
9 PM
5 AM
+1d
Off hours
10 PM
6 AM
+1d
Off hours
11 PM
7 AM
+1d
Off hours
Green = business hours overlap · Amber = partial · Red = off hours
All Hours — GMT to JST
Hub page →GMT ↔ JST Overview
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