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UTC to JST Converter

JST is 9 hours ahead of UTC

Current UTC Time
--:--:-- --
Etc/UTC
Current JST Time
--:--:-- --
Asia/Tokyo
Time Diff
9h ahead
UTC
UTC+0
JST
UTC+9

UTC to JST Conversion Table

Green rows indicate standard business hours (9 AM – 5 PM) in JST

UTC to JST time conversion table showing all 24 hours
UTC JST
12:00 AM 9:00 AM
1:00 AM 10:00 AM
2:00 AM 11:00 AM
3:00 AM 12:00 PM
4:00 AM 1:00 PM
5:00 AM 2:00 PM
6:00 AM 3:00 PM
7:00 AM 4:00 PM
8:00 AM 5:00 PM
9:00 AM 6:00 PM
10:00 AM 7:00 PM
11:00 AM 8:00 PM
12:00 PM 9:00 PM
1:00 PM 10:00 PM
2:00 PM 11:00 PM
3:00 PM 12:00 AM +1d
4:00 PM 1:00 AM +1d
5:00 PM 2:00 AM +1d
6:00 PM 3:00 AM +1d
7:00 PM 4:00 AM +1d
8:00 PM 5:00 AM +1d
9:00 PM 6:00 AM +1d
10:00 PM 7:00 AM +1d
11:00 PM 8:00 AM +1d

Converting Coordinated Universal Time to Japan Standard Time

Coordinated Universal Time (UTC) and Japan Standard Time (JST) are separated by a 9 hours time difference. JST is 9 hours ahead of UTC. UTC is UTC+0, while JST is UTC+9, used in Japan.

When converting from UTC to JST, the key reference points to remember are: 9:00 AM UTC equals 6:00 PM JST, 12:00 PM noon UTC equals 9:00 PM JST, and 5:00 PM UTC equals 2:00 AM JST. The conversion table above shows every hour of the day mapped between these two time zones.

Scheduling Across UTC and JST

For professionals scheduling meetings between UTC and JST, finding overlapping business hours is essential. Standard business hours are typically 9:00 AM to 5:00 PM in each time zone. Given the 9 hours difference, the window of overlap may be limited, making early morning or late evening calls necessary for one party. Use the highlighted working hours in the conversion table above to quickly identify suitable meeting times.

Daylight Saving Time Considerations

UTC does not observe Daylight Saving Time, maintaining UTC+0 year-round. JST does not observe DST, staying at UTC+9 year-round.

Frequently Asked Questions

What is the time difference between UTC and JST?
Japan Standard Time (JST) is 9 hours ahead of Coordinated Universal Time (UTC). When it is 12:00 PM noon in UTC, it is 9:00 PM in JST.
How do I convert UTC to JST?
To convert UTC to JST, add 9 hours to the UTC time. For example, 9:00 AM UTC is 6:00 PM JST. Use the conversion table above for a quick reference of all 24 hours.
Does UTC or JST observe Daylight Saving Time?
UTC does not observe Daylight Saving Time. JST does not observe Daylight Saving Time. During DST transitions, the time difference between these zones may change by 1 hour.
What is the best time to schedule a call between UTC and JST?
The best time to schedule a call between UTC and JST is during overlapping business hours. If you are in UTC, try scheduling between 9:00 AM and 5:00 PM your time, then check the conversion table above to see what that corresponds to in JST.
Is UTC ahead or behind JST?
UTC (UTC+0) is 9 hours behind JST (UTC+9). UTC corresponds to the IANA time zone Etc/UTC, while JST corresponds to Asia/Tokyo.

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Time Zone Info