UTC+0 ⇄ UTC+9
GMT to JST Time Zone Converter
Convert Greenwich Mean Time to Japan Standard Time with live clocks, instant conversion tables, and remote meeting overlap finders.
Time Offset
+9 hours
JST is 9 hours ahead of GMT
⚡ Live GMT to JST Calculator
Real-Time Sync Greenwich Mean Time (GMT) UTC+0
Major Hubs: London, Dublin, Lisbon
Japan Standard Time (JST) UTC+9
6:00 PM
Same calendar day • Hubs: Tokyo, Osaka, Kyoto
Popular GMT to JST Conversions
Instant lookup for standard business and day milestones.
Start of Day
9:00 AM GMT
equals
6:00 PM JST
Mid-Morning
11:00 AM GMT
equals
8:00 PM JST
Noon / Lunch
12:00 PM GMT
equals
9:00 PM JST
Afternoon
3:00 PM GMT
equals
12:00 AM JST
+1 day End of Day
5:00 PM GMT
equals
2:00 AM JST
+1 day Evening
8:00 PM GMT
equals
5:00 AM JST
+1 day
🤝 Remote Meeting Optimizer
Open Golden Hour Planner →
Best Meeting Time Between GMT & JST
Due to the significant time difference, the recommended working overlap occurs around 2:00 PM GMT (11:00 PM JST).
24-Hour GMT to JST Conversion Schedule
Click any row to view meeting overlap status.
Business (9-17)
Awake
Sleep
| GMT Time | JST Time | Calendar Shift | Overlap Compatibility |
|---|---|---|---|
| 12:00 AM (00:00) | 9:00 AM (09:00) | Same Day | ⚡ Flexible Overlap |
| 1:00 AM (01:00) | 10:00 AM (10:00) | Same Day | ⚡ Flexible Overlap |
| 2:00 AM (02:00) | 11:00 AM (11:00) | Same Day | ⚡ Flexible Overlap |
| 3:00 AM (03:00) | 12:00 PM (12:00) | Same Day | ⚡ Flexible Overlap |
| 4:00 AM (04:00) | 1:00 PM (13:00) | Same Day | ⚡ Flexible Overlap |
| 5:00 AM (05:00) | 2:00 PM (14:00) | Same Day | ⚡ Flexible Overlap |
| 6:00 AM (06:00) | 3:00 PM (15:00) | Same Day | ⚡ Flexible Overlap |
| 7:00 AM (07:00) | 4:00 PM (16:00) | Same Day | ⚡ Flexible Overlap |
| 8:00 AM (08:00) | 5:00 PM (17:00) | Same Day | Off-Hours |
| 9:00 AM (09:00) | 6:00 PM (18:00) | Same Day | ⚡ Flexible Overlap |
| 10:00 AM (10:00) | 7:00 PM (19:00) | Same Day | ⚡ Flexible Overlap |
| 11:00 AM (11:00) | 8:00 PM (20:00) | Same Day | ⚡ Flexible Overlap |
| 12:00 PM (12:00) | 9:00 PM (21:00) | Same Day | ⚡ Flexible Overlap |
| 1:00 PM (13:00) | 10:00 PM (22:00) | Same Day | ⚡ Flexible Overlap |
| 2:00 PM (14:00) | 11:00 PM (23:00) | Same Day | ⚡ Flexible Overlap |
| 3:00 PM (15:00) | 12:00 AM (00:00) | +1 day | ⚡ Flexible Overlap |
| 4:00 PM (16:00) | 1:00 AM (01:00) | +1 day | ⚡ Flexible Overlap |
| 5:00 PM (17:00) | 2:00 AM (02:00) | +1 day | Off-Hours |
| 6:00 PM (18:00) | 3:00 AM (03:00) | +1 day | Off-Hours |
| 7:00 PM (19:00) | 4:00 AM (04:00) | +1 day | Off-Hours |
| 8:00 PM (20:00) | 5:00 AM (05:00) | +1 day | Off-Hours |
| 9:00 PM (21:00) | 6:00 AM (06:00) | +1 day | Off-Hours |
| 10:00 PM (22:00) | 7:00 AM (07:00) | +1 day | Off-Hours |
| 11:00 PM (23:00) | 8:00 AM (08:00) | +1 day | Off-Hours |
About Origin Zone
Greenwich Mean Time (GMT)
Greenwich Mean Time (GMT) is the baseline time zone located at the Royal Observatory in Greenwich, London (UTC±0).
Key Cities: London, Dublin, Lisbon, Accra, Reykjavik
About Destination Zone
Japan Standard Time (JST)
Japan Standard Time (JST) is 9 hours ahead of UTC, observed across Japan without daylight saving time.
Key Cities: Tokyo, Osaka, Kyoto, Yokohama, Nagoya, Fukuoka
Related Timezone Conversions
Explore other popular conversions connected to GMT and JST.