Denver to Seoul Time Difference
Seoul is 15 hours ahead of Denver. When it's 06:55:58 AM in Denver, it's 09:55:58 PM in Seoul.
How Many Hours Ahead Is Seoul From Denver?
Seoul is 15 hours ahead of Denver. So Denver is 15 hours behind Seoul looking the other way — the same gap, described from the other end.
In practice that means a working day in Denver starts when it is already 12:00 AM the next day in Seoul. 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 Denver and Seoul
Standard 9-to-5 hours in Denver and Seoul never overlap, so someone has to take the call outside their working day. The most workable window is 4:00 PM to 10:00 PM in Denver, which is 7:00 AM to 1:00 PM in Seoul.
both at work Denver only Seoul only neither — hours shown along the strip are Denver local time.
Convert a Specific Time
Pick any date and time in Denver to see the exact equivalent in Seoul.
Common Times Converted
Denver time on the left, Seoul time on the right.
Denver to Seoul: Full 24-Hour Conversion Table
Based on today, Sunday, October 11, 2026 in Denver. Shaded rows are working hours; the darker shade marks the hours when both cities are at work.
| Denver | Seoul | Working hours |
|---|---|---|
| 12:00 AM | 3:00 PM | Seoul only |
| 1:00 AM | 4:00 PM | Seoul only |
| 2:00 AM | 5:00 PM | — |
| 3:00 AM | 6:00 PM | — |
| 4:00 AM | 7:00 PM | — |
| 5:00 AM | 8:00 PM | — |
| 6:00 AM | 9:00 PM | — |
| 7:00 AM | 10:00 PM | — |
| 8:00 AM | 11:00 PM | — |
| 9:00 AM | 12:00 AM next day | Denver only |
| 10:00 AM | 1:00 AM next day | Denver only |
| 11:00 AM | 2:00 AM next day | Denver only |
| 12:00 PM | 3:00 AM next day | Denver only |
| 1:00 PM | 4:00 AM next day | Denver only |
| 2:00 PM | 5:00 AM next day | Denver only |
| 3:00 PM | 6:00 AM next day | Denver only |
| 4:00 PM | 7:00 AM next day | Denver only |
| 5:00 PM | 8:00 AM next day | — |
| 6:00 PM | 9:00 AM next day | Seoul only |
| 7:00 PM | 10:00 AM next day | Seoul only |
| 8:00 PM | 11:00 AM next day | Seoul only |
| 9:00 PM | 12:00 PM next day | Seoul only |
| 10:00 PM | 1:00 PM next day | Seoul only |
| 11:00 PM | 2:00 PM next day | Seoul only |
Understanding the Denver – Seoul Time Difference
Denver runs on America/Denver, currently MDT (UTC-6:00). Seoul runs on Asia/Seoul, currently KST (UTC+9:00). 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.
Denver today
Seoul today
Frequently Asked Questions
What is the time difference between Denver and Seoul?
Seoul is currently 15 hours ahead of Denver. That gap becomes 16 hours on Sunday, November 1, 2026, when Denver changes its clocks.
How many hours ahead is Seoul from Denver?
Seoul is 15 hours ahead of Denver. Looking at it the other way, Denver is 15 hours behind Seoul.
What time is it in Seoul when it is 9:00 AM in Denver?
When it is 9:00 AM in Denver, it is 12:00 AM the next day in Seoul.
Is Seoul ahead of or behind Denver?
Seoul is 15 hours ahead of Denver. Seoul reaches each point in the day first, so its working day is already finishing while Denver is still getting started.
What is the best time to call between Denver and Seoul?
Standard business hours in Denver and Seoul do not overlap at all, so one side has to step outside the 9-to-5. The most workable window is 4:00 PM to 10:00 PM in Denver, which is 7:00 AM to 1:00 PM in Seoul.
Does the time difference between Denver and Seoul 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 Denver and Seoul in?
Denver uses the America/Denver time zone, currently MDT (UTC-6:00). Seoul uses Asia/Seoul, currently KST (UTC+9:00).