Convert GMT to JST — Time Difference Between Guernsey and Japan Standard Time
Drag the slider or click the time display to type a specific hour and instantly convert GMT to JST — Japan Standard Time is 9 hours ahead of Guernsey. Scroll down to browse the full GMT to JST conversion table, check what time 9 AM, 10 AM, 11 AM, or 12 PM in Guernsey is in Tokyo, and use the date picker to compare times on any day for accurate scheduling.
GMT
Guernsey
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JST
Japan Standard Time
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GMT to JST Time Zone Difference — Hour-by-Hour Conversion Table
Scan each row to find what time any hour in Guernsey is in Tokyo — tap the arrows to jump between days, click "Today" to reset, and use the color-coded bands to quickly spot overlapping work hours, early mornings, and late nights at a glance.
| GMT (Guernsey) | JST (Tokyo) |
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How to Convert GMT to JST
Drag the slider on the GMT timeline to pick your time — the JST time updates instantly. You can also click the time display to type a specific hour or pick one from the 15-minute interval dropdown, and use the date picker to check a different day.
What Is the Time Difference Between GMT and JST?
Japan Standard Time (JST) is 9 hours ahead of Guernsey (GMT). To convert, add 9 hours — for example, 9:00 AM GMT is 6:00 PM JST.
What Time Is It Now in Guernsey?
What Time Is It Now in Tokyo?
GMT to JST Quick Reference
GMT to JST Meeting Planner
Use the color-coded table above to find overlapping work hours between Guernsey and Tokyo. Amber rows mark daytime hours — pick a slot that falls in amber on both sides for a meeting that works for everyone.
Why Trust This GMT to JST Converter?
Timezoney uses the IANA Time Zone Database — the same source that powers your phone and computer — so every conversion handles daylight saving transitions and half-hour offsets automatically.
Guernsey
- Abbreviation
- GMT
- UTC Offset
- UTC+0:00
- City
- Guernsey
- Country
- Guernsey
Japan Standard Time
- Abbreviation
- JST
- UTC Offset
- UTC+9:00
- City
- Tokyo
- Country
- Japan