Convert JST to UTC
UTC is 9 hours behind JST. JST is UTC+9 and UTC is UTC+0.
Right now: JST · UTC
Best time to schedule a meeting
Standard 9–5 working hours do not overlap at all between JST and UTC. Someone has to take an early or late call — or use asynchronous communication instead.
| JST | UTC | Suitable? |
|---|---|---|
| 9:00 AM | 12:00 AM | outside 9–5 |
| 10:00 AM | 1:00 AM | outside 9–5 |
| 11:00 AM | 2:00 AM | outside 9–5 |
| 12:00 PM | 3:00 AM | outside 9–5 |
| 1:00 PM | 4:00 AM | outside 9–5 |
| 2:00 PM | 5:00 AM | outside 9–5 |
| 3:00 PM | 6:00 AM | outside 9–5 |
| 4:00 PM | 7:00 AM | outside 9–5 |
| 5:00 PM | 8:00 AM | outside 9–5 |
JST to UTC conversion table
| JST | UTC |
|---|---|
| 12:00 AM | 3:00 PM (previous day) |
| 1:00 AM | 4:00 PM (previous day) |
| 2:00 AM | 5:00 PM (previous day) |
| 3:00 AM | 6:00 PM (previous day) |
| 4:00 AM | 7:00 PM (previous day) |
| 5:00 AM | 8:00 PM (previous day) |
| 6:00 AM | 9:00 PM (previous day) |
| 7:00 AM | 10:00 PM (previous day) |
| 8:00 AM | 11:00 PM (previous 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 |
About JST
Japan Standard Time (JST) is UTC+9. It is used in all of Japan, with no daylight saving.
About UTC
Coordinated Universal Time (UTC) is UTC+0. It is used in the global time standard, used by aviation, computing and science.
A warning about daylight saving
The abbreviations on this page each denote a single fixed offset, so every figure here is exact. What changes is which abbreviation a place uses. New York is on EST in January and EDT in July, so "New York time" moves by an hour twice a year while EST and EDT themselves never move. When you schedule across zones, name the city rather than the abbreviation, or use UTC — that is what calendar software does internally.
Frequently asked questions
What time is 9:00 AM JST in UTC?
9:00 AM JST is 12:00 AM UTC.
Is UTC ahead of JST?
UTC is 9 hours behind JST.
Which time zone does this use?
JST is UTC+9 and UTC is UTC+0. Both abbreviations denote a single fixed offset, so this conversion never shifts with daylight saving — what changes is which abbreviation a place is using at the time.