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MST to HST converter
Mountain Time
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Hawaii Time
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Hawaii Time is 4 hours behind Mountain Time for most of the year, and 3 hours behind for part of it, because the two change their clocks on different dates (or only one of them changes at all).
When does the difference change?
In 2026:
- January 1 to March 7: Hawaii Time is 3 hours behind Mountain Time
- March 8 to October 31: Hawaii Time is 4 hours behind Mountain Time
- November 1 to December 31: Hawaii Time is 3 hours behind Mountain Time
Questions
What time is 9 AM MST in HST?
For most of the year, 9 AM Mountain Time is 5 AM Hawaii Time. For part of the year it is 6 AM, because of daylight saving time.
How many hours ahead or behind is HST from MST?
Hawaii Time is 4 hours behind Mountain Time for most of the year, and 3 hours behind for part of it, because the two change their clocks on different dates (or only one of them changes at all).
Does the MST to HST difference change?
Yes. It changes 2 times in 2026 because of daylight saving time.
About these time zones
MST to HST, hour by hour
| Mountain Time | Hawaii Time |
|---|---|
| 12 AM | 9 PM (previous day) |
| 1 AM | 10 PM (previous day) |
| 2 AM | 11 PM (previous day) |
| 3 AM | 12 AM |
| 4 AM | 1 AM |
| 5 AM | 2 AM |
| 6 AM | 3 AM |
| 7 AM | 4 AM |
| 8 AM | 5 AM |
| 9 AM | 6 AM |
| 10 AM | 7 AM |
| 11 AM | 8 AM |
| 12 PM | 9 AM |
| 1 PM | 10 AM |
| 2 PM | 11 AM |
| 3 PM | 12 PM |
| 4 PM | 1 PM |
| 5 PM | 2 PM |
| 6 PM | 3 PM |
| 7 PM | 4 PM |
| 8 PM | 5 PM |
| 9 PM | 6 PM |
| 10 PM | 7 PM |
| 11 PM | 8 PM |
Based on the clocks on Sunday, November 8, 2026. Use the converter above for another date.