HST → MST Converter
Hawaii to Mountain — INDOPACOM coordination with NORTHCOM (Colorado Springs), tourism supply chain.
HST → MST
8:40 AM
Hawaii-Aleutian Standard Time (HST)
Thursday, June 11, 2026
UTC-10 (DST active)
12:40 PM
Mountain Daylight Time (MDT)
Thursday, June 11, 2026
UTC-6 (DST active)
Time Zone Converter
HST·Honolulu
8:40 AM
Thursday, June 11, 2026
MST·Denver
12:40 PM
Thursday, June 11, 2026
Compare Times
| HST | MST |
|---|
Morning
| HST | MST |
|---|---|
| 12:00 AM HST | 3:00 AM MST |
| 1:00 AM HST | 4:00 AM MST |
| 2:00 AM HST | 5:00 AM MST |
| 3:00 AM HST | 6:00 AM MST |
| 4:00 AM HST | 7:00 AM MST |
| 5:00 AM HST | 8:00 AM MST |
| 6:00 AM HST | 9:00 AM MST |
| 7:00 AM HST | 10:00 AM MST |
| 8:00 AM HST | 11:00 AM MST |
| 9:00 AM HST | 12:00 PM MST |
| 10:00 AM HST | 1:00 PM MST |
| 11:00 AM HST | 2:00 PM MST |
Afternoon
| HST | MST |
|---|---|
| 12:00 PM HST | 3:00 PM MST |
| 1:00 PM HST | 4:00 PM MST |
| 2:00 PM HST | 5:00 PM MST |
| 3:00 PM HST | 6:00 PM MST |
| 4:00 PM HST | 7:00 PM MST |
Evening
| HST | MST |
|---|---|
| 5:00 PM HST | 8:00 PM MST |
| 6:00 PM HST | 9:00 PM MST |
| 7:00 PM HST | 10:00 PM MST |
| 8:00 PM HST | 11:00 PM MST |
| 9:00 PM HST | 12:00 AM MST |
| 10:00 PM HST | 1:00 AM MST |
| 11:00 PM HST | 2:00 AM MST |
Frequently Asked Questions: HST to MST
What is the time difference between Hawaii Time and Mountain Time?
MST is 3 hours ahead of HST (standard time).
What time is midnight in HST in MST?
Midnight (12:00 AM) in Hawaii Time translates to 3:00 AM MST in Mountain Time.
When do business hours overlap between HST and MST?
The business hours overlap window is 09:00–14:00 HST (12:00–17:00 MST). There is a strong overlap with plenty of shared working hours.
Common Time Conversions
EST · New York →
CST · Chicago →
MST · Denver →
PST · Los Angeles →
AKST · Anchorage →
HST · Honolulu →
UTC · Universal →
GMT · London →
IST · New Delhi →
CET · Paris →
How Time Zone Conversion Works
Time zone conversion works by comparing the UTC offset of one location to another. Every city or region is measured relative to Coordinated Universal Time (UTC), which acts as the global reference point for civil time.
MST is 3 hours ahead of HST (standard time).
Daylight Saving Time: MST observes DST; HST does not. The offset between them shifts by 1 hour twice a year — in spring and autumn — when MST changes its clocks.
Best time to call Denver from Honolulu
Planning a remote meeting or international call? The optimal business hours overlap between Honolulu and Denver is strong, with significant shared business hours available.
Try Meeting Planner for multi-city group scheduling →HST
09:00–14:00
Hawaii Time
MST
12:00–17:00
Mountain Time
Recommended time: 11:30 HST / 14:30 MST
DST schedule for 2026
Current-year daylight saving start and end dates for the selected zones.
HST · Hawaii Time
Standard offset −10:00
Hawaii Time remains on a constant standard offset for the year.
Hawaii does not observe DST. The Aleutian Islands portion of HAST does observe DST (becoming HADT, UTC−9), but population there is negligible. For practical purposes HST is a fixed-offset zone.
MST · Mountain Time
Standard offset −07:00
- Starts
- Mar 8, 2026 · 02:00 → 03:00
- second_sunday_of_march
- Ends
- Nov 1, 2026 · 02:00 → 01:00
- first_sunday_of_november
- Daylight time
- MDT · −06:00
Most of Arizona stays on MST year-round (does not observe DST). The Navajo Nation within Arizona does observe DST.
Principal Cities
HST — Hawaii Time
- HonoluluUnited States
- Pearl CityUnited States
- HiloUnited States
- KailuaUnited States
MST — Mountain Time
- PhoenixUnited States
- CalgaryCanada
- EdmontonCanada
- DenverUnited States