MST to JST time difference
JST is 15 hours ahead of MST right now. The difference changes between 16 hours and 15 hours during the year because of daylight saving time.
Quick examples: 9:00 AM MST = 12:00 AM JST · 12:00 PM MST = 3:00 AM JST · 5:00 PM MST = 8:00 AM JST
MST to JST conversion table
| Mountain Time (MST) | Japan Standard Time (JST) |
|---|---|
| 12:00 AM MST | 3:00 PM JST |
| 1:00 AM MST | 4:00 PM JST |
| 2:00 AM MST | 5:00 PM JST |
| 3:00 AM MST | 6:00 PM JST |
| 4:00 AM MST | 7:00 PM JST |
| 5:00 AM MST | 8:00 PM JST |
| 6:00 AM MST | 9:00 PM JST |
| 7:00 AM MST | 10:00 PM JST |
| 8:00 AM MST | 11:00 PM JST |
| 9:00 AM MST | 12:00 AM JST (next day) |
| 10:00 AM MST | 1:00 AM JST (next day) |
| 11:00 AM MST | 2:00 AM JST (next day) |
| 12:00 PM MST | 3:00 AM JST (next day) |
| 1:00 PM MST | 4:00 AM JST (next day) |
| 2:00 PM MST | 5:00 AM JST (next day) |
| 3:00 PM MST | 6:00 AM JST (next day) |
| 4:00 PM MST | 7:00 AM JST (next day) |
| 5:00 PM MST | 8:00 AM JST (next day) |
| 6:00 PM MST | 9:00 AM JST (next day) |
| 7:00 PM MST | 10:00 AM JST (next day) |
| 8:00 PM MST | 11:00 AM JST (next day) |
| 9:00 PM MST | 12:00 PM JST (next day) |
| 10:00 PM MST | 1:00 PM JST (next day) |
| 11:00 PM MST | 2:00 PM JST (next day) |
How to convert MST to JST
- Pick a date and time in Mountain Time.
- The matching Japan Standard Time time appears instantly on the right.
- Use the ⇄ button to convert JST to MST instead.
About Mountain Time and Japan Standard Time
Mountain Time (MST) is used in Denver, Salt Lake City and Calgary. Japan Standard Time (JST) is used in Tokyo, Osaka and all of Japan.
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Frequently asked questions
What is the time difference between MST and JST?
JST is 15 hours ahead of MST right now. The difference changes between 16 hours and 15 hours during the year because of daylight saving time.
How do I convert MST to JST?
Add 15 hours to the MST time. For example, 12:00 PM MST is 3:00 AM JST.
Where is MST used?
Mountain Time is used in Denver, Salt Lake City and Calgary.
Where is JST used?
Japan Standard Time is used in Tokyo, Osaka and all of Japan.
Does this converter handle daylight saving time?
Yes. The converter uses the official time zone database, so it automatically applies daylight saving time for the date you pick.