What is the time difference between Chicago and London?

The time difference between Chicago and London depends on whether it is Daylight Saving Time (DST) or Standard Time:

1. During Daylight Saving Time (usually March to November):

- When it is 12:00 PM noon in Chicago, it is 5:00 PM in London.

2. During Standard Time (usually November to March):

- When it is 12:00 PM noon in Chicago, it is 6:00 PM in London.

This is because London is located in the UTC+00:00 time zone, while Chicago is located in the UTC-06:00 time zone during Daylight Saving Time and the UTC-05:00 time zone during Standard Time.