TimeThereSeoul to Chicago time difference
Chicago is 14h behind Seoul (as of 2026-09-30).
Seoul does not use daylight saving time. Chicago does, so the gap changes twice a year.
Every gap change in 2026 and 2027
Gap means how far Chicago is from Seoul. Times are local at the moment the new gap starts.
2026
| Seoul time | Chicago time | Gap |
|---|---|---|
| Sun, Mar 8, 17:00 | Sun, Mar 8, 03:00 | 15h behind to 14h behind (shrinks) |
| Sun, Nov 1, 16:00 | Sun, Nov 1, 01:00 | 14h behind to 15h behind (grows) |
2027
| Seoul time | Chicago time | Gap |
|---|---|---|
| Sun, Mar 14, 17:00 | Sun, Mar 14, 03:00 | 15h behind to 14h behind (shrinks) |
| Sun, Nov 7, 16:00 | Sun, Nov 7, 01:00 | 14h behind to 15h behind (grows) |
Business hours overlap
- 15h behind: Working days of 9:00 to 18:00: no shared hours. Working days of 8:00 to 20:00: 3h shared (Seoul 08:00 to 11:00 is Chicago 17:00 to 20:00).
- 14h behind: Working days of 9:00 to 18:00: no shared hours. Working days of 8:00 to 20:00: 2h shared (Seoul 08:00 to 10:00 is Chicago 18:00 to 20:00).
FAQ
What is the time difference between Seoul and Chicago?
Chicago is 15h behind from Jan 1, 2026, then 14h behind from Mar 8, 2026, then 15h behind from Nov 1, 2026, then 14h behind from Mar 14, 2027, then 15h behind from Nov 7, 2027. The exact number depends on daylight saving time.
When does the time difference between Seoul and Chicago change?
It changes on Mar 8, 2026, Nov 1, 2026, Mar 14, 2027, Nov 7, 2027 (dates in Seoul time).
What are good meeting times for Seoul and Chicago?
Working days of 9:00 to 18:00: no shared hours. Working days of 8:00 to 20:00: 3h shared (Seoul 08:00 to 11:00 is Chicago 17:00 to 20:00). Check the table above because the gap moves on the dates listed.
Related pairs
- Seoul to San Francisco
- Seoul to Los Angeles
- Seoul to New York
- Seoul to Seattle
- Seoul to Austin
- Seoul to Toronto
- Seoul to London
- Seoul to Berlin
Data comes from the IANA time zone database as built into Node.js. Later rule changes by governments can move these dates.
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