7am in Korea Standard Time is 4pm in Mountain Time on the previous day.

Frequently asked

Quick answers about converting between Korea Standard Time and Mountain Time. Can't find what you need? Email [email protected].

What is the time difference between Korea Standard Time and Mountain Time?

Korea Standard Time is 15 hours ahead of Mountain Time right now. We always show the live, daylight-saving-correct difference, so this figure already accounts for whichever side is observing summer time today.

When it's 7am in Korea Standard Time, what time is it in Mountain Time?

7am in Korea Standard Time is 4pm in Mountain Time on the previous day. It falls outside the 9-to-5 in Korea Standard Time but lands inside working hours in Mountain Time. Use the hour-by-hour table above to read any other time across.

What's the best time for a call between Korea Standard Time and Mountain Time?

There's no comfortable 9-to-5 overlap between Korea Standard Time and Mountain Time — they sit on opposite sides of the planet's working day. Plan for an early or late call on one side, or hand work off asynchronously.

Does this account for daylight saving time?

Yes. We track every clock change in both places, so the abbreviations you see — KST and MDT — are the ones actually in effect right now, not a fixed all-year value. When either side changes its clocks, this page updates automatically.

Why is the date sometimes different on each side?

When two places are far enough apart, the same moment can fall on different calendar days. That is why some conversions are marked "previous day" or "next day" — it is the same instant in time, read off two clocks that crossed midnight at different points.