10:15 AM
Thursday, August 13, 2026
UTC+09:00Fixed offset
Time Zone Converter
JST to MDTTime Converter
Convert Japan Standard Time to Mountain Daylight 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
MDT
Mountain Daylight Time
Enter a local date and time using JST.
MDT
7:15 PM
Wednesday, August 12, 2026
UTC-06:00Fixed offset
Time difference
MDT is 15 hours behind JST
Hourly comparison
24 hours24-hour conversion table
Compare each hour in JST with MDT.
| Hour | JST | MDT | Difference |
|---|---|---|---|
| 0 | 10:15 AM Thursday, August 13, 2026 | 7:15 PM Wednesday, August 12, 2026 | -15h |
| 1 | 11:15 AM Thursday, August 13, 2026 | 8:15 PM Wednesday, August 12, 2026 | -15h |
| 2 | 12:15 PM Thursday, August 13, 2026 | 9:15 PM Wednesday, August 12, 2026 | -15h |
| 3 | 1:15 PM Thursday, August 13, 2026 | 10:15 PM Wednesday, August 12, 2026 | -15h |
| 4 | 2:15 PM Thursday, August 13, 2026 | 11:15 PM Wednesday, August 12, 2026 | -15h |
| 5 | 3:15 PM Thursday, August 13, 2026 | 12:15 AM Thursday, August 13, 2026 | -15h |
| 6 | 4:15 PM Thursday, August 13, 2026 | 1:15 AM Thursday, August 13, 2026 | -15h |
| 7 | 5:15 PM Thursday, August 13, 2026 | 2:15 AM Thursday, August 13, 2026 | -15h |
| 8 | 6:15 PM Thursday, August 13, 2026 | 3:15 AM Thursday, August 13, 2026 | -15h |
| 9 | 7:15 PM Thursday, August 13, 2026 | 4:15 AM Thursday, August 13, 2026 | -15h |
| 10 | 8:15 PM Thursday, August 13, 2026 | 5:15 AM Thursday, August 13, 2026 | -15h |
| 11 | 9:15 PM Thursday, August 13, 2026 | 6:15 AM Thursday, August 13, 2026 | -15h |
| 12 | 10:15 PM Thursday, August 13, 2026 | 7:15 AM Thursday, August 13, 2026 | -15h |
| 13 | 11:15 PM Thursday, August 13, 2026 | 8:15 AM Thursday, August 13, 2026 | -15h |
| 14 | 12:15 AM Friday, August 14, 2026 | 9:15 AM Thursday, August 13, 2026 | -15h |
| 15 | 1:15 AM Friday, August 14, 2026 | 10:15 AM Thursday, August 13, 2026 | -15h |
| 16 | 2:15 AM Friday, August 14, 2026 | 11:15 AM Thursday, August 13, 2026 | -15h |
| 17 | 3:15 AM Friday, August 14, 2026 | 12:15 PM Thursday, August 13, 2026 | -15h |
| 18 | 4:15 AM Friday, August 14, 2026 | 1:15 PM Thursday, August 13, 2026 | -15h |
| 19 | 5:15 AM Friday, August 14, 2026 | 2:15 PM Thursday, August 13, 2026 | -15h |
| 20 | 6:15 AM Friday, August 14, 2026 | 3:15 PM Thursday, August 13, 2026 | -15h |
| 21 | 7:15 AM Friday, August 14, 2026 | 4:15 PM Thursday, August 13, 2026 | -15h |
| 22 | 8:15 AM Friday, August 14, 2026 | 5:15 PM Thursday, August 13, 2026 | -15h |
| 23 | 9:15 AM Friday, August 14, 2026 | 6:15 PM Thursday, August 13, 2026 | -15h |
About JST
The standard time used throughout Japan.
- Full name
- Japan Standard Time
- Type
- Fixed UTC offset
- Regions
- Japan
Target time zone
About MDT
The daylight-saving offset used in parts of the Mountain Time region.
- Full name
- Mountain Daylight Time
- Type
- Fixed UTC offset
- Regions
- United States, Canada
Reverse this conversion
Convert MDT back to JST.
FAQ
JST to MDT time FAQ
Common questions about converting Japan Standard Time to Mountain Daylight Time, their UTC offsets and daylight-saving behavior.
What is the time difference between JST and MDT?
MDT is 15 hours behind JST on this date.
What time is 9:00 AM JST in MDT?
When it is 9:00 AM in JST, it is 6:00 PM in MDT on Wednesday, August 12, 2026.
Is MDT ahead of JST?
No. MDT is currently 15 hours behind JST.
Do JST and MDT use daylight saving time?
JST is defined as a fixed UTC offset. Its offset does not change automatically according to the selected date. MDT is defined as a fixed UTC offset. Its offset does not change automatically according to the selected date.
Where are JST and MDT used?
JST is associated with Japan. MDT is associated with United States, Canada. Time-zone abbreviations can be ambiguous, so TimeInOne uses the specific definitions shown on this page.