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GMT to JST converter
Greenwich Mean Time
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Japan Standard Time
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Japan Standard Time is always 9 hours ahead of Greenwich Mean Time.
When does the difference change?
The difference stays the same all year: JST is 9 hours ahead of GMT.
Questions
What time is 9 AM GMT in JST?
9 AM Greenwich Mean Time is 6 PM Japan Standard Time.
How many hours ahead or behind is JST from GMT?
Japan Standard Time is always 9 hours ahead of Greenwich Mean Time.
Does the GMT to JST difference change?
No, it stays the same all year.
About these time zones
GMT to JST, hour by hour
| Greenwich Mean Time | Japan Standard Time |
|---|---|
| 12 AM | 9 AM |
| 1 AM | 10 AM |
| 2 AM | 11 AM |
| 3 AM | 12 PM |
| 4 AM | 1 PM |
| 5 AM | 2 PM |
| 6 AM | 3 PM |
| 7 AM | 4 PM |
| 8 AM | 5 PM |
| 9 AM | 6 PM |
| 10 AM | 7 PM |
| 11 AM | 8 PM |
| 12 PM | 9 PM |
| 1 PM | 10 PM |
| 2 PM | 11 PM |
| 3 PM | 12 AM (next day) |
| 4 PM | 1 AM (next day) |
| 5 PM | 2 AM (next day) |
| 6 PM | 3 AM (next day) |
| 7 PM | 4 AM (next day) |
| 8 PM | 5 AM (next day) |
| 9 PM | 6 AM (next day) |
| 10 PM | 7 AM (next day) |
| 11 PM | 8 AM (next day) |
Based on the clocks on Monday, October 12, 2026. Use the converter above for another date.