Convert MST to HST — Time Difference Between Whitehorse and Adak

How to Convert MST to HST

Drag the slider on the MST timeline to pick your time — the HST time updates instantly. You can also click the time display to type a specific hour or pick one from the 15-minute interval dropdown, and use the date picker to check a different day.

What Is the Time Difference Between MST and HST?

Adak (HST) is 3 hours behind Whitehorse (MST). To convert, subtract 3 hours — for example, 9:00 AM MST is 6:00 AM HST.

MST to HST Quick Reference

MST to HST Meeting Planner

Use the color-coded table above to find overlapping work hours between Whitehorse and Adak. Amber rows mark daytime hours — pick a slot that falls in amber on both sides for a meeting that works for everyone.

Why Trust This MST to HST Converter?

Timezoney uses the IANA Time Zone Database — the same source that powers your phone and computer — so every conversion handles daylight saving transitions and half-hour offsets automatically.