MST to JST
Convert Mountain Standard Time (MST) to Japan Standard Time (JST), live. JST is normally 16 hours ahead of MST. Pick any time below, or open the full world clock map.
Loading live MST and JST clocks…
MST vs JST
MST (Mountain Standard Time) runs at UTC−7 and JST (Japan Standard Time) at UTC+9. JST is normally 16 hours ahead of MST.
MST is the standard time (UTC−7); when daylight saving is in effect it becomes MDT (UTC−6). The live clock on this page always shows the current offset. JST stays at UTC+9 all year round — it does not observe daylight saving time.
Looking for the reverse conversion? See JST to MST. You can also browse every offset on the interactive time zone map or line up several zones at once with the meeting planner.