JST to MST time
JSTJapan Standard Time12:39:10 AMSat 10 Oct · JST UTC+9
15 hMST is behind
MSTMountain Time9:39:10 AMFri 9 Oct · MDT UTC−6Synchronising…
JST and MST time difference
MST is currently 15 h behind JST. JST is on JST (UTC+09:00) and MST is on MDT (UTC−06:00).
The difference can change with daylight saving time. The next change is in MST on Sunday, 1 November 2026, after which MST will be 16 h behind JST.
If it is 9:00 in JST, what time is it in MST?
It is 18:00 in MST (previous day).
What is the best time for a call between JST and MST?
Use the planner above: green hours are within 9:00–17:00 in both places.