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HST to MST converter

MST is 3 hours ahead of HST today. HST (Hawaii Standard Time) - currently UTC−10; MST (Mountain Standard Time) - currently UTC−7.

6 hours of the workday overlap: 9 AM-3 PM HST is 12 PM-6 PM MST. Quick answers: 9 AM HST = 12 PM MST, 12 PM HST = 3 PM MST, 5 PM HST = 8 PM MST.

HST · Hawaii Standard Time

UTC−10

MST · Mountain Standard Time

UTC−7

Convert a time

MST
--:--

Working hours side by side

columns: HST hours
PING · 09–18 local MAYBE · 07–09, 18–21 NOT NOW · 21–07Outlined: everyone can be pinged

HST to MST conversion table

HSTMSTVerdict in MST
12 AM · 00:003 AM · 03:00NOT NOW
1 AM · 01:004 AM · 04:00NOT NOW
2 AM · 02:005 AM · 05:00NOT NOW
3 AM · 03:006 AM · 06:00NOT NOW
4 AM · 04:007 AM · 07:00MAYBE
5 AM · 05:008 AM · 08:00MAYBE
6 AM · 06:009 AM · 09:00PING
7 AM · 07:0010 AM · 10:00PING
8 AM · 08:0011 AM · 11:00PING
9 AM · 09:0012 PM · 12:00PING
10 AM · 10:001 PM · 13:00PING
11 AM · 11:002 PM · 14:00PING
12 PM · 12:003 PM · 15:00PING
1 PM · 13:004 PM · 16:00PING
2 PM · 14:005 PM · 17:00PING
3 PM · 15:006 PM · 18:00MAYBE
4 PM · 16:007 PM · 19:00MAYBE
5 PM · 17:008 PM · 20:00MAYBE
6 PM · 18:009 PM · 21:00NOT NOW
7 PM · 19:0010 PM · 22:00NOT NOW
8 PM · 20:0011 PM · 23:00NOT NOW
9 PM · 21:0012 AM · 00:00 (next day)NOT NOW
10 PM · 22:001 AM · 01:00 (next day)NOT NOW
11 PM · 23:002 AM · 02:00 (next day)NOT NOW

Cities on HST

Pacific/Honolulu
HonoluluEast HonoluluPearl CityWaiau-Pacific PalisadesMakakilo / Kapolei / Honokai HaleKalihi-Palama

Cities on MST

America/Denver
DenverEl PasoAlbuquerqueColorado SpringsSalt Lake CitySanta Fe

Other conversions

All converters
MST → HSTHST → ESTHST → EDTHST → PSTHST → PDTHST → CSTHST → CDTHST → GMTHST → UTCHST → BSTHST → CET

Questions

What is the time difference between HST and MST?

MST (Mountain Standard Time) is 3 hours ahead of HST (Hawaii Standard Time) right now: UTC−10 versus UTC−7.

What is 9 AM HST in MST?

9:00 AM HST is 12 PM MST.

What is 5 PM HST in MST?

5:00 PM HST is 8 PM MST.

Does daylight saving change the HST–MST difference?

HST has no daylight saving; it stays UTC−10 all year. Denver switches between MST and MDT; next change Sunday, 14 March 2027 (UTC−7 → UTC−6).