Seoul to Denver Time Difference
Denver is 15 hours behind Seoul. When it's 01:29:49 AM in Seoul, it's 10:29:49 AM in Denver.
How Many Hours Behind Is Denver From Seoul?
Denver is 15 hours behind Seoul. So Seoul is 15 hours ahead of Denver looking the other way — the same gap, described from the other end.
In practice that means a working day in Seoul starts when it is already 6:00 PM the previous day in Denver. The gap is not fixed all year: it becomes 16 hours on Sunday, November 1, 2026, when Denver changes its clocks.
Best Time to Call Seoul and Denver
Standard 9-to-5 hours in Seoul and Denver never overlap, so someone has to take the call outside their working day. The most workable window is 7:00 AM to 1:00 PM in Seoul, which is 4:00 PM to 10:00 PM in Denver.
both at work Seoul only Denver only neither — hours shown along the strip are Seoul local time.
Convert a Specific Time
Pick any date and time in Seoul to see the exact equivalent in Denver.
Common Times Converted
Seoul time on the left, Denver time on the right.
Seoul to Denver: Full 24-Hour Conversion Table
Based on today, Monday, October 12, 2026 in Seoul. Shaded rows are working hours; the darker shade marks the hours when both cities are at work.
| Seoul | Denver | Working hours |
|---|---|---|
| 12:00 AM | 9:00 AM prev day | Denver only |
| 1:00 AM | 10:00 AM prev day | Denver only |
| 2:00 AM | 11:00 AM prev day | Denver only |
| 3:00 AM | 12:00 PM prev day | Denver only |
| 4:00 AM | 1:00 PM prev day | Denver only |
| 5:00 AM | 2:00 PM prev day | Denver only |
| 6:00 AM | 3:00 PM prev day | Denver only |
| 7:00 AM | 4:00 PM prev day | Denver only |
| 8:00 AM | 5:00 PM prev day | — |
| 9:00 AM | 6:00 PM prev day | Seoul only |
| 10:00 AM | 7:00 PM prev day | Seoul only |
| 11:00 AM | 8:00 PM prev day | Seoul only |
| 12:00 PM | 9:00 PM prev day | Seoul only |
| 1:00 PM | 10:00 PM prev day | Seoul only |
| 2:00 PM | 11:00 PM prev day | Seoul only |
| 3:00 PM | 12:00 AM | Seoul only |
| 4:00 PM | 1:00 AM | Seoul only |
| 5:00 PM | 2:00 AM | — |
| 6:00 PM | 3:00 AM | — |
| 7:00 PM | 4:00 AM | — |
| 8:00 PM | 5:00 AM | — |
| 9:00 PM | 6:00 AM | — |
| 10:00 PM | 7:00 AM | — |
| 11:00 PM | 8:00 AM | — |
Understanding the Seoul – Denver Time Difference
Seoul runs on Asia/Seoul, currently KST (UTC+9:00). Denver runs on America/Denver, currently MDT (UTC-6:00). The gap of 15 hours is simply the distance between those two offsets.
Denver observes Daylight Saving Time and Seoul does not, so the gap between them shifts by an hour twice a year. The next shift is on Sunday, November 1, 2026, when Denver adjusts its clocks and the difference becomes 16 hours. Anything scheduled across that date needs checking again.
Full clock-change dates: Daylight Saving Time in the United States.
Seoul today
Denver today
Frequently Asked Questions
What is the time difference between Seoul and Denver?
Denver is currently 15 hours behind Seoul. That gap becomes 16 hours on Sunday, November 1, 2026, when Denver changes its clocks.
How many hours behind is Denver from Seoul?
Denver is 15 hours behind Seoul. Looking at it the other way, Seoul is 15 hours ahead of Denver.
What time is it in Denver when it is 9:00 AM in Seoul?
When it is 9:00 AM in Seoul, it is 6:00 PM the previous day in Denver.
Is Denver ahead of or behind Seoul?
Denver is 15 hours behind Seoul. Seoul reaches each point in the day first, so Denver is still getting started while the Seoul working day is finishing.
What is the best time to call between Seoul and Denver?
Standard business hours in Seoul and Denver do not overlap at all, so one side has to step outside the 9-to-5. The most workable window is 7:00 AM to 1:00 PM in Seoul, which is 4:00 PM to 10:00 PM in Denver.
Does the time difference between Seoul and Denver change during the year?
Yes. Denver observes Daylight Saving Time and Seoul does not, so the gap between them shifts during the year. It changes to 16 hours on Sunday, November 1, 2026.
What time zones are Seoul and Denver in?
Seoul uses the Asia/Seoul time zone, currently KST (UTC+9:00). Denver uses America/Denver, currently MDT (UTC-6:00).