JST to UTC Converter
UTC is 9 hours behind JST
JST to UTC Conversion Table
Green rows indicate standard business hours (9 AM – 5 PM) in UTC
| JST | UTC |
|---|---|
| 12:00 AM | 3:00 PM -1d |
| 1:00 AM | 4:00 PM -1d |
| 2:00 AM | 5:00 PM -1d |
| 3:00 AM | 6:00 PM -1d |
| 4:00 AM | 7:00 PM -1d |
| 5:00 AM | 8:00 PM -1d |
| 6:00 AM | 9:00 PM -1d |
| 7:00 AM | 10:00 PM -1d |
| 8:00 AM | 11:00 PM -1d |
| 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 |
Converting Japan Standard Time to Coordinated Universal Time
Japan Standard Time (JST) and Coordinated Universal Time (UTC) are separated by a 9 hours time difference. UTC is 9 hours behind JST. JST is UTC+9, used in Japan, while UTC is UTC+0.
When converting from JST to UTC, the key reference points to remember are: 9:00 AM JST equals 12:00 AM UTC, 12:00 PM noon JST equals 3:00 AM UTC, and 5:00 PM JST equals 8:00 AM UTC. The conversion table above shows every hour of the day mapped between these two time zones.
Scheduling Across JST and UTC
For professionals scheduling meetings between JST and UTC, 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
JST does not observe Daylight Saving Time, maintaining UTC+9 year-round. UTC does not observe DST, staying at UTC+0 year-round.