Jacksonville to Seoul Time Difference
Seoul is 13 hours ahead of Jacksonville. When it's 08:58:14 AM in Jacksonville, it's 09:58:14 PM in Seoul.
How Many Hours Ahead Is Seoul From Jacksonville?
Seoul is 13 hours ahead of Jacksonville. So Jacksonville is 13 hours behind Seoul looking the other way — the same gap, described from the other end.
In practice that means a working day in Jacksonville starts when it is already 10:00 PM in Seoul. The gap is not fixed all year: it becomes 14 hours on Sunday, November 1, 2026, when Jacksonville changes its clocks.
Best Time to Call Jacksonville and Seoul
Standard 9-to-5 hours in Jacksonville and Seoul never overlap, so someone has to take the call outside their working day. The most workable window is 6:00 PM to 10:00 PM in Jacksonville, which is 7:00 AM to 11:00 AM in Seoul.
both at work Jacksonville only Seoul only neither — hours shown along the strip are Jacksonville local time.
Convert a Specific Time
Pick any date and time in Jacksonville to see the exact equivalent in Seoul.
Common Times Converted
Jacksonville time on the left, Seoul time on the right.
Jacksonville to Seoul: Full 24-Hour Conversion Table
Based on today, Sunday, October 11, 2026 in Jacksonville. Shaded rows are working hours; the darker shade marks the hours when both cities are at work.
| Jacksonville | Seoul | Working hours |
|---|---|---|
| 12:00 AM | 1:00 PM | Seoul only |
| 1:00 AM | 2:00 PM | Seoul only |
| 2:00 AM | 3:00 PM | Seoul only |
| 3:00 AM | 4:00 PM | Seoul only |
| 4:00 AM | 5:00 PM | — |
| 5:00 AM | 6:00 PM | — |
| 6:00 AM | 7:00 PM | — |
| 7:00 AM | 8:00 PM | — |
| 8:00 AM | 9:00 PM | — |
| 9:00 AM | 10:00 PM | Jacksonville only |
| 10:00 AM | 11:00 PM | Jacksonville only |
| 11:00 AM | 12:00 AM next day | Jacksonville only |
| 12:00 PM | 1:00 AM next day | Jacksonville only |
| 1:00 PM | 2:00 AM next day | Jacksonville only |
| 2:00 PM | 3:00 AM next day | Jacksonville only |
| 3:00 PM | 4:00 AM next day | Jacksonville only |
| 4:00 PM | 5:00 AM next day | Jacksonville only |
| 5:00 PM | 6:00 AM next day | — |
| 6:00 PM | 7:00 AM next day | — |
| 7:00 PM | 8:00 AM next day | — |
| 8:00 PM | 9:00 AM next day | Seoul only |
| 9:00 PM | 10:00 AM next day | Seoul only |
| 10:00 PM | 11:00 AM next day | Seoul only |
| 11:00 PM | 12:00 PM next day | Seoul only |
Understanding the Jacksonville – Seoul Time Difference
Jacksonville runs on America/New_York, currently EDT (UTC-4:00). Seoul runs on Asia/Seoul, currently KST (UTC+9:00). The gap of 13 hours is simply the distance between those two offsets.
Jacksonville 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 Jacksonville 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.
Jacksonville today
Seoul today
Frequently Asked Questions
What is the time difference between Jacksonville and Seoul?
Seoul is currently 13 hours ahead of Jacksonville. That gap becomes 14 hours on Sunday, November 1, 2026, when Jacksonville changes its clocks.
How many hours ahead is Seoul from Jacksonville?
Seoul is 13 hours ahead of Jacksonville. Looking at it the other way, Jacksonville is 13 hours behind Seoul.
What time is it in Seoul when it is 9:00 AM in Jacksonville?
When it is 9:00 AM in Jacksonville, it is 10:00 PM in Seoul.
Is Seoul ahead of or behind Jacksonville?
Seoul is 13 hours ahead of Jacksonville. Seoul reaches each point in the day first, so its working day is already finishing while Jacksonville is still getting started.
What is the best time to call between Jacksonville and Seoul?
Standard business hours in Jacksonville and Seoul do not overlap at all, so one side has to step outside the 9-to-5. The most workable window is 6:00 PM to 10:00 PM in Jacksonville, which is 7:00 AM to 11:00 AM in Seoul.
Does the time difference between Jacksonville and Seoul change during the year?
Yes. Jacksonville 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 Jacksonville and Seoul in?
Jacksonville uses the America/New_York time zone, currently EDT (UTC-4:00). Seoul uses Asia/Seoul, currently KST (UTC+9:00).