10:15 AM
Thursday, August 13, 2026
UTC+09:00Fixed offset
Time Zone Converter
JST to MSTTime Converter
Convert Japan Standard Time to Mountain Standard Time, compare their live UTC offsets and explore a complete 24-hour conversion table.
Live clocksDST aware24-hour table
Live comparison
Current local times
From
JST
Japan Standard Time
To
MST
Mountain Standard Time
Enter a local date and time using JST.
MST
6:15 PM
Wednesday, August 12, 2026
UTC-07:00Fixed offset
Time difference
MST is 16 hours behind JST
Hourly comparison
24 hours24-hour conversion table
Compare each hour in JST with MST.
| Hour | JST | MST | Difference |
|---|---|---|---|
| 0 | 10:15 AM Thursday, August 13, 2026 | 6:15 PM Wednesday, August 12, 2026 | -16h |
| 1 | 11:15 AM Thursday, August 13, 2026 | 7:15 PM Wednesday, August 12, 2026 | -16h |
| 2 | 12:15 PM Thursday, August 13, 2026 | 8:15 PM Wednesday, August 12, 2026 | -16h |
| 3 | 1:15 PM Thursday, August 13, 2026 | 9:15 PM Wednesday, August 12, 2026 | -16h |
| 4 | 2:15 PM Thursday, August 13, 2026 | 10:15 PM Wednesday, August 12, 2026 | -16h |
| 5 | 3:15 PM Thursday, August 13, 2026 | 11:15 PM Wednesday, August 12, 2026 | -16h |
| 6 | 4:15 PM Thursday, August 13, 2026 | 12:15 AM Thursday, August 13, 2026 | -16h |
| 7 | 5:15 PM Thursday, August 13, 2026 | 1:15 AM Thursday, August 13, 2026 | -16h |
| 8 | 6:15 PM Thursday, August 13, 2026 | 2:15 AM Thursday, August 13, 2026 | -16h |
| 9 | 7:15 PM Thursday, August 13, 2026 | 3:15 AM Thursday, August 13, 2026 | -16h |
| 10 | 8:15 PM Thursday, August 13, 2026 | 4:15 AM Thursday, August 13, 2026 | -16h |
| 11 | 9:15 PM Thursday, August 13, 2026 | 5:15 AM Thursday, August 13, 2026 | -16h |
| 12 | 10:15 PM Thursday, August 13, 2026 | 6:15 AM Thursday, August 13, 2026 | -16h |
| 13 | 11:15 PM Thursday, August 13, 2026 | 7:15 AM Thursday, August 13, 2026 | -16h |
| 14 | 12:15 AM Friday, August 14, 2026 | 8:15 AM Thursday, August 13, 2026 | -16h |
| 15 | 1:15 AM Friday, August 14, 2026 | 9:15 AM Thursday, August 13, 2026 | -16h |
| 16 | 2:15 AM Friday, August 14, 2026 | 10:15 AM Thursday, August 13, 2026 | -16h |
| 17 | 3:15 AM Friday, August 14, 2026 | 11:15 AM Thursday, August 13, 2026 | -16h |
| 18 | 4:15 AM Friday, August 14, 2026 | 12:15 PM Thursday, August 13, 2026 | -16h |
| 19 | 5:15 AM Friday, August 14, 2026 | 1:15 PM Thursday, August 13, 2026 | -16h |
| 20 | 6:15 AM Friday, August 14, 2026 | 2:15 PM Thursday, August 13, 2026 | -16h |
| 21 | 7:15 AM Friday, August 14, 2026 | 3:15 PM Thursday, August 13, 2026 | -16h |
| 22 | 8:15 AM Friday, August 14, 2026 | 4:15 PM Thursday, August 13, 2026 | -16h |
| 23 | 9:15 AM Friday, August 14, 2026 | 5:15 PM Thursday, August 13, 2026 | -16h |
About JST
The standard time used throughout Japan.
- Full name
- Japan Standard Time
- Type
- Fixed UTC offset
- Regions
- Japan
Target time zone
About MST
The fixed standard-time offset used in parts of North America.
- Full name
- Mountain Standard Time
- Type
- Fixed UTC offset
- Regions
- United States, Canada, Mexico
Reverse this conversion
Convert MST back to JST.
FAQ
JST to MST time FAQ
Common questions about converting Japan Standard Time to Mountain Standard Time, their UTC offsets and daylight-saving behavior.
What is the time difference between JST and MST?
MST is 16 hours behind JST on this date.
What time is 9:00 AM JST in MST?
When it is 9:00 AM in JST, it is 5:00 PM in MST on Wednesday, August 12, 2026.
Is MST ahead of JST?
No. MST is currently 16 hours behind JST.
Do JST and MST use daylight saving time?
JST is defined as a fixed UTC offset. Its offset does not change automatically according to the selected date. MST is defined as a fixed UTC offset. Its offset does not change automatically according to the selected date.
Where are JST and MST used?
JST is associated with Japan. MST is associated with United States, Canada, Mexico. Time-zone abbreviations can be ambiguous, so TimeInOne uses the specific definitions shown on this page.