MST to HST Converter

HST is 3h 0m behind MST. When it's 12:00 PM MST, it's 9:00 AM HST.

From

MST · UTC-7

9:09:45PM

Mountain Standard Time

e.g. Denver, Phoenix

To

HST · UTC-10

6:09:45PM

Hawaii Standard Time

e.g. Honolulu

Open in World ClockHST → MST
9:00 AM MST=6:00 AM HST
12:00 PM MST=9:00 AM HST
5:00 PM MST=2:00 PM HST

Hourly conversion (MST → HST)

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

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.

Hawaii does not observe daylight saving time, so HST (UTC−10) applies year-round.

More MST conversions

Frequently asked questions

What is the time difference between MST and HST?
HST is 3h 0m behind MST. MST is UTC-7 and HST is UTC-10.
What is 12:00 PM MST in HST?
12:00 PM MST is 9:00 AM HST.
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.