Time difference: Chicago and Seoul

Seoul is 14 hours ahead of Chicago.

Seoul is 14 hours ahead of Chicago. Chicago is UTC-5. Seoul is UTC+9.

Chicago on 15 October 2026: sunrise 07:03, sunset 18:08, day length 11 h 6 min.

Seoul on 15 October 2026: sunrise 06:39, sunset 17:55, day length 11 h 16 min.

For Chicago and Seoul: The next clock change in Chicago is 1 hour back on 1 November 2026 at 02:00, from UTC-5 to UTC-6.

For Seoul and Chicago: Seoul has no clock change scheduled in the next year. The last year with a seasonal offset change was 1988. The offset now is UTC+9.

When the difference changes
Change
The gap changes on 1 November 2026 at 02:00, when clocks in Chicago move back 1 hour.
The gap changes on 14 March 2027 at 02:00, when clocks in Chicago move forward 1 hour.
The gap changes on 7 November 2027 at 02:00, when clocks in Chicago move back 1 hour.
Working hours from each side
View09:00 to 17:00
From ChicagoChicago and Seoul have no hour that is 09:00 to 17:00 in both cities.
From SeoulSeoul and Chicago have no hour that is 09:00 to 17:00 in both cities.
Hours in Chicago and Seoul. Shaded cells are 09:00 to 17:00. The stronger shade is when both are.
ChicagoSeoul
00:0014:00
01:0015:00
02:0016:00
03:0017:00
04:0018:00
05:0019:00
06:0020:00
07:0021:00
08:0022:00
09:0023:00
10:0000:00 (next day)
11:0001:00 (next day)
12:0002:00 (next day)
13:0003:00 (next day)
14:0004:00 (next day)
15:0005:00 (next day)
16:0006:00 (next day)
17:0007:00 (next day)
18:0008:00 (next day)
19:0009:00 (next day)
20:0010:00 (next day)
21:0011:00 (next day)
22:0012:00 (next day)
23:0013:00 (next day)
Sun this year
CityLongest dayShortest day
Chicago with Seoul21 June 2026, 15 h 14 min21 December 2026, 9 h 8 min
Seoul with Chicago21 June 2026, 14 h 46 min22 December 2026, 9 h 34 min
Next public holidays
CityDateHoliday
Chicago and Seoul11 November 2026Veterans Day
Chicago and Seoul26 November 2026Thanksgiving Day
Seoul and Chicago25 December 2026기독탄신일
Seoul and Chicago1 January 2027신정