GMT to JST — Timezone Converter
Greenwich Mean Time (UTC+0) → Japan Standard Time (UTC+9)
GMTUTC+0
--:--:--
…
London, United Kingdom
DST…
JSTUTC+9
--:--:--
…
Tokyo, Japan
About this conversion
Standard differenceGMT is 9 hours behind JST
GMT UTCUTC+0
JST UTCUTC+9
Daylight saving (DST)GMT only
⚠️ One or both zones observe daylight saving time. The actual difference may temporarily shift during DST transitions.
Frequently Asked Questions
What is the time difference between GMT and JST?
GMT (UTC+0) is 9 hours behind JST (UTC+9) in standard time. This difference may change during daylight saving time periods.
When it is 12:00 noon GMT, what time is it in JST?
When it is 12:00 PM (noon) in GMT, it is 9:00 PM in JST.
How do I convert GMT time to JST?
GMT is 9 hours behind JST. To convert GMT time to JST, add 9 hours. To convert JST time to GMT, subtract 9 hours.
What cities are in the GMT timezone?
Cities in the GMT timezone (Greenwich Mean Time) include: London, Dublin, Reykjavik, Abidjan, Accra, Dakar.
Do GMT or JST observe daylight saving time (DST)?
GMT observes daylight saving time, but JST does not. The actual time difference between them changes by 1 hour when GMT switches between standard and summer time.