HST to MST Converter
Mountain Time (MST / MDT) is 4 hours ahead of Hawaii Time (HST).
Quick Reference
- Hawaii Time
- HST (GMT-10)
No Daylight Saving Time
- Mountain Time
- MDT (GMT-6)
MST starts on Nov 1, 2026
Cities in HST
Cities in MST
Frequently Asked Questions
- What is the difference between HST and MST?
- MST is 4 hours ahead of HST.
- How do I convert HST to MST?
- To convert from HST to MST, add 4 hours. Use the interactive converter on this page to convert specific times.
- What cities are in HST and MST?
- Cities in HST include Honolulu. Cities in MST include Denver, El Paso, Albuquerque, Colorado Springs, Salt Lake City.