Time zone converter

JST to UTC

Coordinated Universal Time (UTC) is 9 hours behind Japan Standard Time (JST) all year: 9:00 AM JST is 12:00 AM UTC.

Japan Standard Time
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Current time in Japan Standard Time
Coordinated Universal Time
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Current time in Coordinated Universal Time
Pick a date and time to convert.

UTC vs JST over the next 12 months

PeriodUTC isExample
Oct 23, 2026 onwards9 hours behind9:00 AM JST = 12:00 AM UTC

JST to UTC conversion table

Every hour of a weekday around Oct 23, 2026, in both zones.

Japan Standard TimeCoordinated Universal Time
12:00 AM3:00 PM (previous day)
1:00 AM4:00 PM (previous day)
2:00 AM5:00 PM (previous day)
3:00 AM6:00 PM (previous day)
4:00 AM7:00 PM (previous day)
5:00 AM8:00 PM (previous day)
6:00 AM9:00 PM (previous day)
7:00 AM10:00 PM (previous day)
8:00 AM11:00 PM (previous day)
9:00 AM12:00 AM
10:00 AM1:00 AM
11:00 AM2:00 AM
12:00 PM3:00 AM
1:00 PM4:00 AM
2:00 PM5:00 AM
3:00 PM6:00 AM
4:00 PM7:00 AM
5:00 PM8:00 AM
6:00 PM9:00 AM
7:00 PM10:00 AM
8:00 PM11:00 AM
9:00 PM12:00 PM
10:00 PM1:00 PM
11:00 PM2:00 PM

Best time for a meeting

There is no 9-to-5 overlap; within an 8 AM–8 PM day the zones overlap for 3 hours on a weekday: 5:00 PM–8:00 PM JST, which is 8:00 AM–11:00 AM UTC.

Comparing more than two places? The meeting planner lines up working hours for up to six cities.

Daylight saving time

Neither JST nor UTC changes its clocks, so the difference is the same all year.

Where these clocks are used

  • Japan Standard Time (JST): all of Japan. IANA zone Asia/Tokyo.
  • Coordinated Universal Time (UTC): servers, aviation and logs worldwide; the same clock as GMT. IANA zone Etc/UTC.

Questions

What time is it in UTC when it is 9 AM JST?

On Oct 23, 2026, 9:00 AM JST is 12:00 AM UTC.

How many hours behind JST is UTC?

UTC is always 9 hours behind JST.

Do JST and UTC observe daylight saving time?

Japan Standard Time stays on UTC+9 all year. Coordinated Universal Time stays on UTC±0 all year.

What is the best time for a meeting between JST and UTC?

There is no 9-to-5 overlap; within an 8 AM–8 PM day the zones overlap for 3 hours on a weekday: 5:00 PM–8:00 PM JST, which is 8:00 AM–11:00 AM UTC.

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Related conversions

Computed from the IANA time zone database on Oct 23, 2026. Live clocks and the converter use your browser's copy of the same data.