The World Clock Converter
Event Planner

GMT to JST Time Converter

Compare GMT and JST instantly. The clocks below stay in sync with the IANA time-zone database, so daylight-saving transitions are handled automatically for both GMT and Tokyo.

Saturday, Jul 25
07:33
:52AM
Today
Saturday, Jul 25
03:33
:52PM
Today

24-Hour Comparison Timeline

Green = working hours · Yellow = early/late · Red = night

🇬🇧London
12AM
1AM
2AM
3AM
4AM
5AM
6AM
7AM
8AM
9AM
10AM
11AM
12PM
1PM
2PM
3PM
4PM
5PM
6PM
7PM
8PM
9PM
10PM
11PM
🇯🇵Tokyo
9AM
10AM
11AM
12PM
1PM
2PM
3PM
4PM
5PM
6PM
7PM
8PM
9PM
10PM
11PM
12AM
1AM
2AM
3AM
4AM
5AM
6AM
7AM
8AM

24-hour reference table

GMT (GMT)JST (Tokyo)
12:00 AM09:00 AM
01:00 AM10:00 AM
02:00 AM11:00 AM
03:00 AM12:00 PM
04:00 AM01:00 PM
05:00 AM02:00 PM
06:00 AM03:00 PM
07:00 AM04:00 PM
08:00 AM05:00 PM
09:00 AM06:00 PM
10:00 AM07:00 PM
11:00 AM08:00 PM
12:00 PM09:00 PM
01:00 PM10:00 PM
02:00 PM11:00 PM
03:00 PM12:00 AM(Sun, Jul 26)
04:00 PM01:00 AM(Sun, Jul 26)
05:00 PM02:00 AM(Sun, Jul 26)
06:00 PM03:00 AM(Sun, Jul 26)
07:00 PM04:00 AM(Sun, Jul 26)
08:00 PM05:00 AM(Sun, Jul 26)
09:00 PM06:00 AM(Sun, Jul 26)
10:00 PM07:00 AM(Sun, Jul 26)
11:00 PM08:00 AM(Sun, Jul 26)

Daylight saving time

Neither GMT nor Tokyo observes daylight saving time — the offset between GMT and JST is fixed year-round.

Working-hours overlap

Standard 9-to-5 hours in GMT and Tokyo do not overlap. Use an early or late slot on one side.

Frequently asked questions

What is the time difference between GMT and JST?+

JST (UTC+09:00) is currently 9 hours ahead of GMT (UTC+00:00). This page recalculates the offset live from the IANA time-zone database, including any daylight-saving transitions.

Does GMT or JST observe daylight saving time?+

Neither GMT nor Tokyo observes daylight saving time, so the offset stays fixed all year. Times on this page always reflect the current local rules.

What are the best meeting hours between GMT and Tokyo?+

Standard 9–5 working hours in GMT and Tokyo do not overlap. Pick an early or late slot for one side, or use the 24-hour table above to find a time that works.

How do I quickly convert GMT to JST?+

Use the live clocks and 24-hour reference table above. Pick any hour on the GMT row to see the matching JST time. The Event Planner also lets you pick a specific date and share it with attendees.

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