What is JST?
JST stands for Japan Standard Time. Its offset from UTC is UTC+9, 9 hours ahead of UTC.
JST is the time of all of Japan, nine hours ahead of UTC. Japan does not use daylight saving.
JST is the same clock time as KST in South Korea.
Where JST is used
Japan. The table shows examples, not every place. Entries in bold are on JST at that moment.
| Place | Mid-January 2026 | Mid-July 2026 | Now |
|---|---|---|---|
| Tokyo | JST (UTC+9) | JST (UTC+9) | JST (UTC+9) |
Time difference between JST and other cities
| City | Compared with JST, now | Changes in the next 12 months |
|---|---|---|
| New York City | 14 hours behind | Sun 14 Mar 2027, 07:00 UTC: 13 hours behind |
| Los Angeles | 17 hours behind | Sun 14 Mar 2027, 10:00 UTC: 16 hours behind |
| London | 9 hours behind | Sun 28 Mar 2027, 01:00 UTC: 8 hours behind Sun 31 Oct 2027, 01:00 UTC: 9 hours behind |
| Dubai | 5 hours behind | No change |
| Mumbai | 3 hours 30 minutes behind | No change |
| Singapore | 1 hour behind | No change |
| Tokyo | Same time | No change |
| Sydney | 2 hours ahead | Sat 3 Apr 2027, 16:00 UTC: 1 hour ahead Sat 2 Oct 2027, 16:00 UTC: 2 hours ahead |
A gap changes when the two places change their clocks on different dates. Dates are in UTC.
Working hours that overlap with JST
When it is 09:00 to 17:00 in JST, where is it also a working day (09:00 to 17:00)? This uses today’s clock settings, so check the meeting planner for weeks when clocks change.
| City | Shared working hours |
|---|---|
| New York City | No shared working hours |
| Los Angeles | 09:00 to 10:00 in JST (16:00 to 17:00 in Los Angeles, previous day) |
| London | No shared working hours |
| Dubai | 14:00 to 17:00 in JST (09:00 to 12:00 in Dubai) |
| Mumbai | 12:30 to 17:00 in JST (09:00 to 13:30 in Mumbai) |
| Singapore | 10:00 to 17:00 in JST (09:00 to 16:00 in Singapore) |
| Tokyo | 09:00 to 17:00 in JST (09:00 to 17:00 in Tokyo) |
| Sydney | 09:00 to 15:00 in JST (11:00 to 17:00 in Sydney) |