Most of the year, Seoul is 14 hours ahead of Chicago. During Jan 1–Mar 7, Nov 1–Dec 31, Seoul is 15 hours ahead of Chicago.
| Chicago | Seoul Most of the year | Seoul Jan 1–Mar 7, Nov 1–Dec 31 |
|---|---|---|
| 12 AM | 2 PM | 3 PM |
| 1 AM | 3 PM | 4 PM |
| 2 AM | 4 PM | 5 PM |
| 3 AM | 5 PM | 6 PM |
| 4 AM | 6 PM | 7 PM |
| 5 AM | 7 PM | 8 PM |
| 6 AM | 8 PM | 9 PM |
| 7 AM | 9 PM | 10 PM |
| 8 AM | 10 PM | 11 PM |
| 9 AM | 11 PM | 12 AMnext day |
| 10 AM | 12 AMnext day | 1 AMnext day |
| 11 AM | 1 AMnext day | 2 AMnext day |
| 12 PM | 2 AMnext day | 3 AMnext day |
| 1 PM | 3 AMnext day | 4 AMnext day |
| 2 PM | 4 AMnext day | 5 AMnext day |
| 3 PM | 5 AMnext day | 6 AMnext day |
| 4 PM | 6 AMnext day | 7 AMnext day |
| 5 PM | 7 AMnext day | 8 AMnext day |
| 6 PM | 8 AMnext day | 9 AMnext day |
| 7 PM | 9 AMnext day | 10 AMnext day |
| 8 PM | 10 AMnext day | 11 AMnext day |
| 9 PM | 11 AMnext day | 12 PMnext day |
| 10 PM | 12 PMnext day | 1 PMnext day |
| 11 PM | 1 PMnext day | 2 PMnext day |
Chicago observes daylight saving time from Mar 8, 2026 to Nov 1, 2026, when clocks move forward one hour.
Seoul does not observe daylight saving time (DST), so its offset stays the same all year.
Most of the year, Seoul is 14 hours ahead of Chicago. During Jan 1–Mar 7, Nov 1–Dec 31, Seoul is 15 hours ahead of Chicago.
Chicago observes daylight saving time from Mar 8, 2026 to Nov 1, 2026, when clocks move forward one hour. Seoul does not observe daylight saving time (DST), so its offset stays the same all year.
Most of the year: The best compromise is at Chicago 7 AM–8 AM (Seoul 9 PM–10 PM); Chicago 5 PM–10 PM (Seoul 7 AM (next day)–12 PM). Jan 1–Mar 7, Nov 1–Dec 31: The best compromise is at Chicago 4 PM–10 PM (Seoul 7 AM (next day)–1 PM).