HST to MST time converter
Mountain Time (MST) is 3 hours ahead of Hawaii Time (HST) in January and 4 hours ahead in July, because daylight saving time shifts the difference. Use the grid below to line up Honolulu and Denver: drag the cursor across the day, and working hours (9 AM–5 PM) are highlighted in every row so you can spot a slot that suits both sides.
Right now it is 23:43 HST in Honolulu and 03:43 MDT in Denver.
2/10 zones · drag the tape, scroll sideways or use the arrow keys; Home jumps back to now.
HST to MST: frequently asked
What is the time difference between HST and MST?
Mountain Time (MST) is 3 hours ahead of Hawaii Time (HST) in January and 4 hours ahead in July, because daylight saving time shifts the difference.
What time is 9 AM HST in MST?
9:00 AM HST is 12:00 PM MST in January, and 1:00 PM MST in July.
When do working hours overlap between Honolulu and Denver?
In January: Both sides are within 9:00 AM–5:00 PM working hours between 9:00 AM and 2:00 PM HST (12:00 PM to 5:00 PM MST). In July: Both sides are within 9:00 AM–5:00 PM working hours between 9:00 AM and 1:00 PM HST (1:00 PM to 5:00 PM MST).