JST to MST Converter
Japan Time
1:00:17 PM JST
Tuesday, August 25, 2026
15h
15h
Mountain Time
10:00:17 PM MDT
Monday, August 24, 2026
Mountain Time (MST / MDT) is 15 hours behind Japan Time (JST).
Quick Reference
- Japan Time
- JST (GMT+9)
No Daylight Saving Time
- Mountain Time
- MDT (GMT-6)
MST starts on Nov 1, 2026
Cities in JST
Cities in MST
Frequently Asked Questions
- What is the difference between JST and MST?
- MST is 15 hours behind JST.
- How do I convert JST to MST?
- To convert from JST to MST, subtract 15 hours. Use the interactive converter on this page to convert specific times.
- What cities are in JST and MST?
- Cities in JST include Tokyo, Osaka, Yokohama, Kyoto, Nagoya. Cities in MST include Denver, Salt Lake City, Albuquerque, El Paso, Santa Fe.