HST
UTC-10
Hawaii Standard Time
MST
UTC-7
Mountain Standard Time
MST observes DST — offset shifts ±1h during transitions
Hawaii Standard Time (HST) is 3 hours ahead Mountain Standard Time (MST). When it is noon in HST, it is 4 PM in MST. This offset may change during Daylight Saving Time transitions.
All 24 Hours — HST to MST
Click any row to see the full detail page. Current hour in HST is highlighted.
Best Meeting Times — HST & MST
Recommended windows where both HST and MST participants are within working hours (8 AM–6 PM).
Tip: When scheduling between HST and MST, aim for the “Best” windows above. These times keep both parties within normal working hours, avoiding early-morning or late-evening fatigue. Note that one of these time zones observes Daylight Saving Time — the offset may shift ±1 hour around transition dates.
Related Time Zone Conversions
Frequently Asked Questions — HST to MST
Hawaii Standard Time (HST) is 3 hours ahead of Mountain Standard Time (MST). HST is UTC-10 and MST is UTC-7. This offset may shift by ±1 hour during Daylight Saving Time transitions.
Live Now
HST
UTC-10
11:33:16
Tuesday
MST
UTC-6
15:33:16
Tuesday
Right now, 11 AM HST = 3 PM MST
Business Hours Quick Jump
Reverse Conversion
MST to HST
Mountain Standard Time → Hawaii Standard Time
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