MST to JST Converter

JST is 16h 0m ahead of MST. When it's 12:00 PM MST, it's 4:00 AM (+1 day) JST.

From

MST · UTC-7

9:09:45PM

Mountain Standard Time

e.g. Denver, Phoenix

To

JST · UTC+9

1:09:45PM

Japan Standard Time

e.g. Tokyo

Open in World ClockJST → MST
9:00 AM MST=1:00 AM(+1 day) JST
12:00 PM MST=4:00 AM(+1 day) JST
5:00 PM MST=9:00 AM(+1 day) JST

Hourly conversion (MST → JST)

MSTJST
12:00 AM4:00 PM
1:00 AM5:00 PM
2:00 AM6:00 PM
3:00 AM7:00 PM
4:00 AM8:00 PM
5:00 AM9:00 PM
6:00 AM10:00 PM
7:00 AM11:00 PM
8:00 AM12:00 AM(+1 day)
9:00 AM1:00 AM(+1 day)
10:00 AM2:00 AM(+1 day)
11:00 AM3:00 AM(+1 day)
12:00 PM4:00 AM(+1 day)
1:00 PM5:00 AM(+1 day)
2:00 PM6:00 AM(+1 day)
3:00 PM7:00 AM(+1 day)
4:00 PM8:00 AM(+1 day)
5:00 PM9:00 AM(+1 day)
6:00 PM10:00 AM(+1 day)
7:00 PM11:00 AM(+1 day)
8:00 PM12:00 PM(+1 day)
9:00 PM1:00 PM(+1 day)
10:00 PM2:00 PM(+1 day)
11:00 PM3:00 PM(+1 day)

Shaded rows are within standard working hours (8am–6pm) on both sides.

MST (UTC−7) is the standard-time offset; most of the US Mountain region uses MDT (UTC−6) in summer.

Japan does not observe daylight saving time, so JST (UTC+9) applies year-round.

More MST conversions

Frequently asked questions

What is the time difference between MST and JST?
JST is 16h 0m ahead of MST. MST is UTC-7 and JST is UTC+9.
What is 12:00 PM MST in JST?
12:00 PM MST is 4:00 AM (+1 day) JST.
Does MST change for daylight saving time?
MST (UTC−7) is the standard-time offset; most of the US Mountain region uses MDT (UTC−6) in summer.