12 PM JST to MST

Japan Standard Time → Mountain Standard Time

Partial overlap

JST

12 PM

UTC+9

=

MST

9 PM

UTC-6

(-1 day)

12 PM JST (Japan Standard Time) equals 9 PM MST (previous day) (Mountain Standard Time). This is a common time for meetings across time zones.

Live — JST

22:15:00

Friday, March 20

UTC+9

Live — MST

07:15:00

Friday, March 20

UTC-6

DST active

Daylight Saving Time (DST)

  • MST (Mountain Standard Time) observes DST — currently active (clocks are +1h ahead).
  • DST transitions may shift this offset by ±1 hour twice per year.

JST

Full name
Japan Standard Time
UTC offset
UTC+9
DST
Not observed
Region
East Asia
Current time in JST →

MST

Full name
Mountain Standard Time
UTC offset
UTC-6
DST
Active
Region
North America
Current time in MST →

24-Hour Comparison — JST to MST

Click any row to jump to that hour's page.

12 AM6 AM12 PM6 PM11 PM
JSTMSTDayMeeting
12 AM
9 AM
-1d
Early/Late
1 AM
10 AM
-1d
Early/Late
2 AM
11 AM
-1d
Early/Late
3 AM
12 PM
-1d
Early/Late
4 AM
1 PM
-1d
Early/Late
5 AM
2 PM
-1d
Early/Late
6 AM
3 PM
-1d
Early/Late
7 AM
4 PM
-1d
Early/Late
8 AM
5 PM
-1d
Good
9 AM
6 PM
-1d
Good
10 AM
7 PM
-1d
Early/Late
11 AM
8 PM
-1d
Early/Late
12 PMthis
9 PM
-1d
Early/Late
1 PM
10 PM
-1d
Early/Late
2 PM
11 PM
-1d
Early/Late
3 PM
12 AM
–
Early/Late
4 PM
1 AM
–
Early/Late
5 PM
2 AM
–
Early/Late
6 PM
3 AM
–
Early/Late
7 PM
4 AM
–
Off hours
8 PM
5 AM
–
Off hours
9 PM
6 AM
–
Off hours
10 PM
7 AM
–
Off hours
11 PM
8 AM
–
Early/Late

Green = business hours overlap · Amber = partial · Red = off hours

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11 AM

= 8 PM MST

Next

1 PM

= 10 PM MST

JST ↔ MST Overview

Full 24-hour chart, live clocks, FAQ

View hub

Major Cities

JST Cities

🇯🇵Tokyo🇯🇵Osaka

MST Cities

🇺🇸Phoenix🇺🇸Denver🇨🇦Calgary