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Convert JST to UTC

Japan Standard Time (JST) to Coordinated Universal Time (UTC)

When it's 12:00 PM JST, it's 3:00 AM UTC

UTC+9 UTC±0 -9 hours

Interactive Converter

Pick any time and date to convert between JST and UTC.

JST to UTC Conversion Table

Full 24-hour comparison. Business hours (9 AM -- 6 PM) are highlighted.

JST UTC
12:00 AM 3:00 PM -1 day
1:00 AM 4:00 PM -1 day
2:00 AM 5:00 PM -1 day
3:00 AM 6:00 PM -1 day
4:00 AM 7:00 PM -1 day
5:00 AM 8:00 PM -1 day
6:00 AM 9:00 PM -1 day
7:00 AM 10:00 PM -1 day
8:00 AM 11:00 PM -1 day
9:00 AM 12:00 AM
10:00 AM 1:00 AM
11:00 AM 2:00 AM
12:00 PM 3:00 AM
1:00 PM 4:00 AM
2:00 PM 5:00 AM
3:00 PM 6:00 AM
4:00 PM 7:00 AM
5:00 PM 8:00 AM
6:00 PM 9:00 AM
7:00 PM 10:00 AM
8:00 PM 11:00 AM
9:00 PM 12:00 PM
10:00 PM 1:00 PM
11:00 PM 2:00 PM

Best Meeting Window

Top meeting times for teams in JST and UTC (9 AM -- 6 PM work hours, 1-hour meeting).

12a
3a
6a
9a
12p
3p
6p
9p
JST GMT+9
UTC UTC
Overlap
Everyone available
Most available
Some overlap
Outside work hours
1 12:00 AM -- 1:00 AM JST
JST: 12:00 AM UTC: 3:00 PM

1 of 2 members within working hours. 1 in mid-day range (9 AM–5 PM). Outside work hours for JST.

4.6 / 10
2 1:00 AM -- 2:00 AM JST
JST: 1:00 AM UTC: 4:00 PM

1 of 2 members within working hours. 1 in mid-day range (9 AM–5 PM). Outside work hours for JST.

4.6 / 10
3 2:00 AM -- 3:00 AM JST
JST: 2:00 AM UTC: 5:00 PM

1 of 2 members within working hours. Outside work hours for JST.

4.6 / 10

Try the full Meeting Finder with custom work hours →

Time Difference & DST

UTC is 9 hours behind JST. JST is at UTC+9 and UTC is at UTC±0.

Neither JST nor UTC has an upcoming DST transition within the next 12 months.

The conversion table above reflects the current DST state at build time. Use the interactive converter for live, date-specific conversions.

Major Cities

Japan Standard Time (JST)

  • Tokyo
  • Osaka
  • Yokohama

Coordinated Universal Time (UTC)

  • UTC

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