Time Difference Between Chicago and Seoul
Seoul is 15h ahead of Chicago in standard time, and 14h ahead while Chicago is on daylight saving time.
Chicago clocks move forward on the second Sunday of March and back on the first Sunday of November. Seoul keeps the same clock all year. The figures above cover each part of the year. They do not come from the offset on the day the site was built. The live clocks use the current time.
Working Hours Overlap
For each hour of Chicago's working day (9:00-18:00), here is the corresponding local time in Seoul. Rows highlighted green fall within standard working hours (9:00-18:00) in both cities. Each block is one part of the year, so the table does not change with the day this page was built.
15h ahead (standard time)
| Chicago | Seoul | Both working hours? |
|---|---|---|
| 9 AM | 12 AM | No |
| 10 AM | 1 AM | No |
| 11 AM | 2 AM | No |
| 12 PM | 3 AM | No |
| 1 PM | 4 AM | No |
| 2 PM | 5 AM | No |
| 3 PM | 6 AM | No |
| 4 PM | 7 AM | No |
| 5 PM | 8 AM | No |
| 6 PM | 9 AM | No |
14h ahead (daylight saving time in Chicago, while Seoul is on standard time)
| Chicago | Seoul | Both working hours? |
|---|---|---|
| 9 AM | 11 PM | No |
| 10 AM | 12 AM | No |
| 11 AM | 1 AM | No |
| 12 PM | 2 AM | No |
| 1 PM | 3 AM | No |
| 2 PM | 4 AM | No |
| 3 PM | 5 AM | No |
| 4 PM | 6 AM | No |
| 5 PM | 7 AM | No |
| 6 PM | 8 AM | No |
Best Time to Meet
15h ahead (standard time)
Chicago and Seoul don't share a 9 AM-6 PM working-hours window during standard time. The least disruptive compromise is around 3 PM in Chicago, which falls at 6 AM in Seoul. Expect one side to take an early or late call.
14h ahead (daylight saving time in Chicago, while Seoul is on standard time)
Chicago and Seoul don't share a 9 AM-6 PM working-hours window during daylight saving time in Chicago, while Seoul is on standard time. The least disruptive compromise is around 4 PM in Chicago, which falls at 6 AM in Seoul. Expect one side to take an early or late call.
How the Difference Changes
Only Chicago changes its clocks, so the gap is not one number. The rules are above. The dates for the year you are reading this page load below.
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Chicago
Chicago uses the America/Chicago time zone. Standard time is UTC-6, and daylight saving time is UTC-5.
Seoul
Seoul uses the Asia/Seoul time zone, at UTC+9 all year. This zone does not observe daylight saving time.