MST → HST Converter
Mountain to Hawaii — 3-hour gap. Tourism, military, and Pacific trade.
MST → HST
12:40 PM
Mountain Daylight Time (MDT)
Thursday, June 11, 2026
UTC-6 (DST active)
8:40 AM
Hawaii-Aleutian Standard Time (HST)
Thursday, June 11, 2026
UTC-10 (DST active)
Time Zone Converter
MST·Denver
12:40 PM
Thursday, June 11, 2026
HST·Honolulu
8:40 AM
Thursday, June 11, 2026
Compare Times
| MST | HST |
|---|
Morning
| MST | HST |
|---|---|
| 12:00 AM MST | 9:00 PM HST |
| 1:00 AM MST | 10:00 PM HST |
| 2:00 AM MST | 11:00 PM HST |
| 3:00 AM MST | 12:00 AM HST |
| 4:00 AM MST | 1:00 AM HST |
| 5:00 AM MST | 2:00 AM HST |
| 6:00 AM MST | 3:00 AM HST |
| 7:00 AM MST | 4:00 AM HST |
| 8:00 AM MST | 5:00 AM HST |
| 9:00 AM MST | 6:00 AM HST |
| 10:00 AM MST | 7:00 AM HST |
| 11:00 AM MST | 8:00 AM HST |
Afternoon
| MST | HST |
|---|---|
| 12:00 PM MST | 9:00 AM HST |
| 1:00 PM MST | 10:00 AM HST |
| 2:00 PM MST | 11:00 AM HST |
| 3:00 PM MST | 12:00 PM HST |
| 4:00 PM MST | 1:00 PM HST |
Evening
| MST | HST |
|---|---|
| 5:00 PM MST | 2:00 PM HST |
| 6:00 PM MST | 3:00 PM HST |
| 7:00 PM MST | 4:00 PM HST |
| 8:00 PM MST | 5:00 PM HST |
| 9:00 PM MST | 6:00 PM HST |
| 10:00 PM MST | 7:00 PM HST |
| 11:00 PM MST | 8:00 PM HST |
Frequently Asked Questions: MST to HST
What is the time difference between Mountain Time and Hawaii Time?
HST is 3 hours behind MST (standard time).
What time is midnight in MST in HST?
Midnight (12:00 AM) in Mountain Time translates to 9:00 PM HST in Hawaii Time.
When do business hours overlap between MST and HST?
The business hours overlap window is 12:00–17:00 MST (09:00–14:00 HST). 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.
HST is 3 hours behind MST (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 Honolulu from Denver
Planning a remote meeting or international call? The optimal business hours overlap between Denver and Honolulu is strong, with significant shared business hours available.
Try Meeting Planner for multi-city group scheduling →MST
12:00–17:00
Mountain Time
HST
09:00–14:00
Hawaii Time
Recommended time: 14:30 MST / 11:30 HST
DST schedule for 2026
Current-year daylight saving start and end dates for the selected zones.
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.
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.
Principal Cities
MST — Mountain Time
- PhoenixUnited States
- CalgaryCanada
- EdmontonCanada
- DenverUnited States
HST — Hawaii Time
- HonoluluUnited States
- Pearl CityUnited States
- HiloUnited States
- KailuaUnited States