HST to MST Converter
MST is 3 hours ahead of HST
HST to MST Conversion Table
Green rows indicate standard business hours (9 AM – 5 PM) in MST
| HST | MST |
|---|---|
| 12:00 AM | 3:00 AM |
| 1:00 AM | 4:00 AM |
| 2:00 AM | 5:00 AM |
| 3:00 AM | 6:00 AM |
| 4:00 AM | 7:00 AM |
| 5:00 AM | 8:00 AM |
| 6:00 AM | 9:00 AM |
| 7:00 AM | 10:00 AM |
| 8:00 AM | 11:00 AM |
| 9:00 AM | 12:00 PM |
| 10:00 AM | 1:00 PM |
| 11:00 AM | 2:00 PM |
| 12:00 PM | 3:00 PM |
| 1:00 PM | 4:00 PM |
| 2:00 PM | 5:00 PM |
| 3:00 PM | 6:00 PM |
| 4:00 PM | 7:00 PM |
| 5:00 PM | 8:00 PM |
| 6:00 PM | 9:00 PM |
| 7:00 PM | 10:00 PM |
| 8:00 PM | 11:00 PM |
| 9:00 PM | 12:00 AM +1d |
| 10:00 PM | 1:00 AM +1d |
| 11:00 PM | 2:00 AM +1d |
Converting Hawaii Standard Time to Mountain Standard Time
Hawaii Standard Time (HST) and Mountain Standard Time (MST) are separated by a 3 hours time difference. MST is 3 hours ahead of HST. HST is UTC-10, used in United States, while MST is UTC-7, used in United States, Canada.
When converting from HST to MST, the key reference points to remember are: 9:00 AM HST equals 12:00 PM MST, 12:00 PM noon HST equals 3:00 PM MST, and 5:00 PM HST equals 8:00 PM MST. The conversion table above shows every hour of the day mapped between these two time zones.
Scheduling Across HST and MST
For professionals scheduling meetings between HST and MST, finding overlapping business hours is essential. Standard business hours are typically 9:00 AM to 5:00 PM in each time zone. Given the 3 hours difference, the window of overlap may be limited. Use the highlighted working hours in the conversion table above to quickly identify suitable meeting times.
Daylight Saving Time Considerations
HST does not observe Daylight Saving Time, maintaining UTC-10 year-round. MST observes DST, switching to MDT (UTC-6). During DST transitions, the time difference between these zones may temporarily change by 1 hour. Always verify the current offset during spring and fall transition periods.