Time in JST and MST
The time difference between Japan Standard Time (JST) and Mountain Standard Time (MST) is 16 hours. Mountain Standard Time is 16 hours behind Japan Standard Time.
This means 9am JST is 5pm MST (previous day) and 5pm JST is 1am MST.
Japan Standard Time
- The current local time in JST is 4:07 am (July 9, 2026)
- JST time zone offset is UTC+09:00
Mountain Standard Time
- The current local time in MST is 2:07 am (July 9, 2026)
- MST time zone offset is UTC-07:00
How to convert Japan Standard Time to Mountain Standard Time?
Subtract 16 hours from Japan Standard Time to get Mountain Standard Time.
Time in JST
00:00
Time in MST
00:00
Use the slider above to convert Japan Standard Time to Mountain Standard Time and view the day and night map at different times.
Day–night colors on the map:
Day
Civil twilight
Nautical twilight
Astronomical twilight
NightTime Conversion Chart
| JST | MST |
|---|---|
| 12am | 8am |
| 1am | 9am |
| 2am | 10am |
| 3am | 11am |
| 4am | 12pm |
| 5am | 1pm |
| 6am | 2pm |
| 7am | 3pm |
| 8am | 4pm |
| 9am | 5pm |
| 10am | 6pm |
| 11am | 7pm |
| 12pm | 8pm |
| 1pm | 9pm |
| 2pm | 10pm |
| 3pm | 11pm |
| 4pm | 12am |
| 5pm | 1am |
| 6pm | 2am |
| 7pm | 3am |
| 8pm | 4am |
| 9pm | 5am |
| 10pm | 6am |
| 11pm | 7am |