Seoul to Washington Time Difference
Washington is 13 hours behind Seoul. When it's 01:29:54 AM in Seoul, it's 12:29:54 PM in Washington.
How Many Hours Behind Is Washington From Seoul?
Washington is 13 hours behind Seoul. So Seoul is 13 hours ahead of Washington 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 8:00 PM the previous day in Washington. The gap is not fixed all year: it becomes 14 hours on Sunday, November 1, 2026, when Washington changes its clocks.
Best Time to Call Seoul and Washington
Standard 9-to-5 hours in Seoul and Washington never overlap, so someone has to take the call outside their working day. The most workable window is 7:00 AM to 11:00 AM in Seoul, which is 6:00 PM to 10:00 PM in Washington.
both at work Seoul only Washington 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 Washington.
Common Times Converted
Seoul time on the left, Washington time on the right.
Seoul to Washington: 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 | Washington | Working hours |
|---|---|---|
| 12:00 AM | 11:00 AM prev day | Washington only |
| 1:00 AM | 12:00 PM prev day | Washington only |
| 2:00 AM | 1:00 PM prev day | Washington only |
| 3:00 AM | 2:00 PM prev day | Washington only |
| 4:00 AM | 3:00 PM prev day | Washington only |
| 5:00 AM | 4:00 PM prev day | Washington only |
| 6:00 AM | 5:00 PM prev day | — |
| 7:00 AM | 6:00 PM prev day | — |
| 8:00 AM | 7:00 PM prev day | — |
| 9:00 AM | 8:00 PM prev day | Seoul only |
| 10:00 AM | 9:00 PM prev day | Seoul only |
| 11:00 AM | 10:00 PM prev day | Seoul only |
| 12:00 PM | 11:00 PM prev day | Seoul only |
| 1:00 PM | 12:00 AM | Seoul only |
| 2:00 PM | 1:00 AM | Seoul only |
| 3:00 PM | 2:00 AM | Seoul only |
| 4:00 PM | 3:00 AM | Seoul only |
| 5:00 PM | 4:00 AM | — |
| 6:00 PM | 5:00 AM | — |
| 7:00 PM | 6:00 AM | — |
| 8:00 PM | 7:00 AM | — |
| 9:00 PM | 8:00 AM | — |
| 10:00 PM | 9:00 AM | Washington only |
| 11:00 PM | 10:00 AM | Washington only |
Understanding the Seoul – Washington Time Difference
Seoul runs on Asia/Seoul, currently KST (UTC+9:00). Washington runs on America/New_York, currently EDT (UTC-4:00). The gap of 13 hours is simply the distance between those two offsets.
Washington 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 Washington adjusts its clocks and the difference becomes 14 hours. Anything scheduled across that date needs checking again.
Full clock-change dates: Daylight Saving Time in the United States.
Seoul today
Washington today
Frequently Asked Questions
What is the time difference between Seoul and Washington?
Washington is currently 13 hours behind Seoul. That gap becomes 14 hours on Sunday, November 1, 2026, when Washington changes its clocks.
How many hours behind is Washington from Seoul?
Washington is 13 hours behind Seoul. Looking at it the other way, Seoul is 13 hours ahead of Washington.
What time is it in Washington when it is 9:00 AM in Seoul?
When it is 9:00 AM in Seoul, it is 8:00 PM the previous day in Washington.
Is Washington ahead of or behind Seoul?
Washington is 13 hours behind Seoul. Seoul reaches each point in the day first, so Washington is still getting started while the Seoul working day is finishing.
What is the best time to call between Seoul and Washington?
Standard business hours in Seoul and Washington 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 11:00 AM in Seoul, which is 6:00 PM to 10:00 PM in Washington.
Does the time difference between Seoul and Washington change during the year?
Yes. Washington observes Daylight Saving Time and Seoul does not, so the gap between them shifts during the year. It changes to 14 hours on Sunday, November 1, 2026.
What time zones are Seoul and Washington in?
Seoul uses the Asia/Seoul time zone, currently KST (UTC+9:00). Washington uses America/New_York, currently EDT (UTC-4:00).