This JST to PST converter turns any time in Japan Standard Time (JST) into Pacific Standard Time (PST), using your device clock so daylight saving is applied automatically. PST is 17 hours behind JST when both zones are on standard time, and 16 hours behind during the summer months when clocks have shifted. JST is UTC+9; PST is UTC−8 (PDT: UTC−7).
JST covers Tokyo, Osaka; PST covers Los Angeles, San Francisco, Seattle. Because only PST observes daylight saving time, the difference is not constant through the year. The tables below show both cases, and the converter at the top always uses the rule in force on the date you pick.
JST and PST UTC offsets
JST
UTC+9
Japan Standard Time
No daylight saving time
PST
UTC−8
Pacific Standard Time
PDT UTC−7 from March 8 to November 1, 2026
JST to PST conversion table (standard time)
| JST | PST |
|---|---|
| 12 am | 7 amprevious day |
| 3 am | 10 amprevious day |
| 6 am | 1 pmprevious day |
| 8 am | 3 pmprevious day |
| 9 am | 4 pmprevious day |
| 10 am | 5 pmprevious day |
| 11 am | 6 pmprevious day |
| 12 pm | 7 pmprevious day |
| 1 pm | 8 pmprevious day |
| 2 pm | 9 pmprevious day |
| 3 pm | 10 pmprevious day |
| 4 pm | 11 pmprevious day |
| 5 pm | 12 am |
| 6 pm | 1 am |
| 8 pm | 3 am |
| 10 pm | 5 am |
JST to PST during daylight saving
Between the dates listed above, the difference is 16 hours instead of 17 hours.
| JST | PST/PDT |
|---|---|
| 12 am | 8 amprevious day |
| 3 am | 11 amprevious day |
| 6 am | 2 pmprevious day |
| 8 am | 4 pmprevious day |
| 9 am | 5 pmprevious day |
| 10 am | 6 pmprevious day |
| 11 am | 7 pmprevious day |
| 12 pm | 8 pmprevious day |
| 1 pm | 9 pmprevious day |
| 2 pm | 10 pmprevious day |
| 3 pm | 11 pmprevious day |
| 4 pm | 12 am |
| 5 pm | 1 am |
| 6 pm | 2 am |
| 8 pm | 4 am |
| 10 pm | 6 am |
Frequently asked questions
What is the time difference between JST and PST?
PST is 17 hours behind JST on standard time. During daylight saving the gap changes to 16 hours. That comes from the UTC offsets: JST is UTC+9 and PST is UTC−8. For example, 9 am JST = 4 pm PST the previous day, and in summer 9 am JST = 5 pm PST the previous day.
Is PST ahead of or behind JST?
PST is 17 hours behind JST, so when it is noon in JST it is 7 pm in PST the previous day. Ahead means the clock there already shows a later time; a call at 5 pm JST lands at 12 am PST.
Does JST or PST observe daylight saving time in 2026?
JST keeps UTC+9 all year. PST switches to PDT (UTC−7) on March 8 and back on November 1. Between those dates the difference in the table above shifts by an hour, which is the usual cause of missed calls in spring and autumn.
What is the best time for a meeting between JST and PST?
Office hours (9 am to 5 pm) do not overlap at all with a 17 hours difference. The least painful options are early morning in PST or early evening in JST; for example 8 am JST = 3 pm PST the previous day and 6 pm JST = 1 am PST. Rotate the inconvenient slot between the two sides for recurring calls.
Which cities use JST and PST?
JST (Japan Standard Time) is used in Tokyo, Osaka. PST (Pacific Standard Time) is used in Los Angeles, San Francisco, Seattle, Vancouver. Some cities inside a zone skip daylight saving, noted in parentheses, so their offset matches only part of the year.