Most of the year, Chicago is 6 hours behind London. During Mar 8–Mar 28, Oct 25–Oct 31, Chicago is 5 hours behind London.
| London | Chicago Most of the year | Chicago Mar 8–Mar 28, Oct 25–Oct 31 |
|---|---|---|
| 12 AM | 6 PMprevious day | 7 PMprevious day |
| 1 AM | 7 PMprevious day | 8 PMprevious day |
| 2 AM | 8 PMprevious day | 9 PMprevious day |
| 3 AM | 9 PMprevious day | 10 PMprevious day |
| 4 AM | 10 PMprevious day | 11 PMprevious day |
| 5 AM | 11 PMprevious day | 12 AM |
| 6 AM | 12 AM | 1 AM |
| 7 AM | 1 AM | 2 AM |
| 8 AM | 2 AM | 3 AM |
| 9 AM | 3 AM | 4 AM |
| 10 AM | 4 AM | 5 AM |
| 11 AM | 5 AM | 6 AM |
| 12 PM | 6 AM | 7 AM |
| 1 PM | 7 AM | 8 AM |
| 2 PM | 8 AM | 9 AM |
| 3 PM | 9 AM | 10 AM |
| 4 PM | 10 AM | 11 AM |
| 5 PM | 11 AM | 12 PM |
| 6 PM | 12 PM | 1 PM |
| 7 PM | 1 PM | 2 PM |
| 8 PM | 2 PM | 3 PM |
| 9 PM | 3 PM | 4 PM |
| 10 PM | 4 PM | 5 PM |
| 11 PM | 5 PM | 6 PM |
London observes daylight saving time from Mar 29, 2026 to Oct 25, 2026, when clocks move forward one hour.
Chicago observes daylight saving time from Mar 8, 2026 to Nov 1, 2026, when clocks move forward one hour.
Most of the year, Chicago is 6 hours behind London. During Mar 8–Mar 28, Oct 25–Oct 31, Chicago is 5 hours behind London.
London observes daylight saving time from Mar 29, 2026 to Oct 25, 2026, when clocks move forward one hour. Chicago observes daylight saving time from Mar 8, 2026 to Nov 1, 2026, when clocks move forward one hour.
Most of the year: Both cities are in business hours at London 3 PM–6 PM (Chicago 9 AM–12 PM). Mar 8–Mar 28, Oct 25–Oct 31: Both cities are in business hours at London 2 PM–6 PM (Chicago 9 AM–1 PM).