Does daylight saving time change the offset between Japan Standard Time (JST) and Greenwich Mean Time (GMT)?

Yes. Whenever either region begins or ends daylight saving time (if it observes DST), the difference between clocks can shift. This converter uses real-time timezone data so the offset stays accurate.

Is the Japan Standard Time (JST) to Greenwich Mean Time (GMT) converter free?

Yes. TeamTimezones is free to use with no signup required. Pick your zones, compare current times, and plan meetings across regions.

How accurate is the Japan Standard Time (JST) to Greenwich Mean Time (GMT) conversion?

The tool uses modern browser timezone rules (IANA) and matches what you see above for “right now”. Always double-check mission-critical schedules around DST transition nights.

Japan Standard Time (JST) to Greenwich Mean Time (GMT) Time Converter

Greenwich Mean Time (GMT) is 9 hours behind Japan Standard Time (JST) right now.

At 00:00 (midnight) Japan Standard Time (JST) on 2026-05-22, it is 3:00 PM in Greenwich Mean Time (GMT) on 2026-05-21.

When it is 12:00 PM in Japan Standard Time (JST), it is 3:00 AM in Greenwich Mean Time (GMT) on that same date.

The exact difference can change when either place starts or ends daylight saving time.

Japan Standard Time (JST)

4:33 PM

Friday, May 22

Greenwich Mean Time (GMT)

7:33 AM

Friday, May 22

Quick reference (same moments)

Typical local hours in Japan Standard Time (JST) and matching clock time in Greenwich Mean Time (GMT) for 2026-05-22.

Japan Standard Time (JST)	Greenwich Mean Time (GMT)
9:00 AM	12:00 AM
12:00 PM	3:00 AM
3:00 PM	6:00 AM
6:00 PM	9:00 AM

Japan Standard Time (JST) to Greenwich Mean Time (GMT) Time Converter

Current Time Comparison

Japan Standard Time (JST)

Greenwich Mean Time (GMT)

Quick reference (same moments)