Time in HST and MDT
The time difference between Hawaii–Aleutian Standard Time (HST) and Mountain Daylight Time (MDT) is 4 hours. Mountain Daylight Time is 4 hours ahead of Hawaii–Aleutian Standard Time.
This means 9am HST is 1pm MDT and 5pm HST is 9pm MDT.
Hawaii–Aleutian Standard Time
- The current local time in HST is 7:11 am (July 11, 2026)
- HST time zone offset is UTC-10:00
Mountain Daylight Time
- The current local time in MDT is 3:11 am (July 11, 2026)
- MDT time zone offset is UTC-06:00
How to convert Hawaii–Aleutian Standard Time to Mountain Daylight Time?
Add 4 hours to Hawaii–Aleutian Standard Time to get Mountain Daylight Time.
Time in HST
00:00
Time in MDT
00:00
Use the slider above to convert Hawaii–Aleutian Standard Time to Mountain Daylight Time and view the day and night map at different times.
Day–night colors on the map:
Day
Civil twilight
Nautical twilight
Astronomical twilight
NightTime Conversion Chart
| HST | MDT |
|---|---|
| 12am | 4am |
| 1am | 5am |
| 2am | 6am |
| 3am | 7am |
| 4am | 8am |
| 5am | 9am |
| 6am | 10am |
| 7am | 11am |
| 8am | 12pm |
| 9am | 1pm |
| 10am | 2pm |
| 11am | 3pm |
| 12pm | 4pm |
| 1pm | 5pm |
| 2pm | 6pm |
| 3pm | 7pm |
| 4pm | 8pm |
| 5pm | 9pm |
| 6pm | 10pm |
| 7pm | 11pm |
| 8pm | 12am |
| 9pm | 1am |
| 10pm | 2am |
| 11pm | 3am |