Japan Standard Time (JST)
Japan Standard Time is UTC+9 all year. Japan does not observe daylight saving time.
- IANA zone
- Asia/Tokyo
- Offset
- UTC+9 all year
- Used in
- Japan
- Major cities
- Tokyo, Osaka, Yokohama, Nagoya, Sapporo
JST to UTC converter
Convert Japan Standard Time (JST) to Coordinated Universal Time (UTC), with daylight saving applied for the exact date you pick.
From
Tue, Oct 27
To
Tue, Oct 27 Same day
| Su | Mo | Tu | We | Th | Fr | Sa |
|---|
JST 9 to 5 UTC 9 to 5
- From zone
- Japan Standard Time
- Offset and clock
- UTC+9 No daylight saving time
- IANA name
- Asia/Tokyo
- To zone
- Coordinated Universal Time
- Offset and clock
- UTC+0 No daylight saving time
- IANA name
- Etc/UTC
UTC is 9 hours behind JST.
- Time difference
- Coordinated Universal Time is 9 hours behind Japan Standard Time all year.
- Meeting window
- Working days of 9 AM to 5 PM do not overlap. The least disruptive slot is around 4:30 PM JST, which is 7:30 AM UTC.
- Daylight saving
- Neither zone observes daylight saving time, so the difference never changes.
Where JST and UTC apply
Shaded areas follow the official zone boundaries, so a country split across zones is split here too. Hover or tap a region for its local time.
- Japan Standard Time
- Coordinated Universal Time
- Same UTC offset right now, different zone rules
Hour by hour
Every hour of Tuesday, October 27, 2026, side by side. Days with a clock change show 23 or 25 rows.
Shaded rows fall inside working hours in both places.
| Tokyo (JST) | Greenwich meridian (UTC) | Working hours |
|---|---|---|
| 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 |
JST to UTC conversion table
Common JST times and their UTC equivalents.
| Japan Standard Time | UTC 9 h behind, all year |
|---|---|
| 12:00 AM | 3:00 PM (previous day) |
| 6:00 AM | 9:00 PM (previous day) |
| 8:00 AM | 11:00 PM (previous day) |
| 9:00 AM | 12:00 AM |
| 10:00 AM | 1:00 AM |
| 12:00 PM | 3:00 AM |
| 2:00 PM | 5:00 AM |
| 3:00 PM | 6:00 AM |
| 5:00 PM | 8:00 AM |
| 6:00 PM | 9:00 AM |
| 8:00 PM | 11:00 AM |
| 10:00 PM | 1:00 PM |
Upcoming clock changes
Neither Japan Standard Time nor Coordinated Universal Time changes its clocks in the next 18 months.
About the two zones
Coordinated Universal Time (UTC)
Coordinated Universal Time is the reference every time zone is measured from. It never changes for daylight saving time. Servers, aviation, logs and APIs use it because it is unambiguous.
- IANA zone
- Etc/UTC
- Offset
- UTC+0 all year
- Used in
- no single country; it is the world reference clock
JST and UTC, answered
What is the time difference between JST and UTC?
Coordinated Universal Time is 9 hours behind Japan Standard Time all year.
What is a good meeting time for JST and UTC?
Working days of 9 AM to 5 PM do not overlap. The least disruptive slot is around 4:30 PM JST, which is 7:30 AM UTC.
Does daylight saving time affect JST to UTC?
Neither zone observes daylight saving time, so the difference never changes.