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