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

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

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

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

At 00:00 (midnight) Greenwich Mean Time (GMT) on 2026-05-22, it is 9:00 AM in Japan Standard Time (JST).

When it is 12:00 PM in Greenwich Mean Time (GMT), it is 9:00 PM in Japan Standard Time (JST) on that same date.

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

Greenwich Mean Time (GMT)

7:33 AM

Friday, May 22

Japan Standard Time (JST)

4:33 PM

Friday, May 22

Quick reference (same moments)

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

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

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

Current Time Comparison

Greenwich Mean Time (GMT)

Japan Standard Time (JST)

Quick reference (same moments)