Time zone conversion

Chicago to London time converter

Convert Chicago to London for a specific date and time. The result uses date-aware local rules for Chicago and date-aware local rules for London.

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Chicago nowThu, 9:34 PM CDTUTC-05:00
London nowFri, 3:34 AM GMT+1UTC+01:00
Current differenceLondon is 6 hours ahead of ChicagoOffsets can change when a city observes daylight saving time.

24-hour reference

Chicago to London time table

This table uses Thursday, July 30, 2026 in Chicago. Choose another date in the converter above when daylight saving rules may differ.

ChicagoLondon
12:00 AMThu 6:00 AM
1:00 AMThu 7:00 AM
2:00 AMThu 8:00 AM
3:00 AMThu 9:00 AM
4:00 AMThu 10:00 AM
5:00 AMThu 11:00 AM
6:00 AMThu 12:00 PM
7:00 AMThu 1:00 PM
8:00 AMThu 2:00 PM
9:00 AMThu 3:00 PM
10:00 AMThu 4:00 PM
11:00 AMThu 5:00 PM
12:00 PMThu 6:00 PM
1:00 PMThu 7:00 PM
2:00 PMThu 8:00 PM
3:00 PMThu 9:00 PM
4:00 PMThu 10:00 PM
5:00 PMThu 11:00 PM
6:00 PMFri 12:00 AM
7:00 PMFri 1:00 AM
8:00 PMFri 2:00 AM
9:00 PMFri 3:00 AM
10:00 PMFri 4:00 AM
11:00 PMFri 5:00 AM

Meeting planner

Working-hour overlap

2 hours in this reference day fall between 9:00 AM and 5:00 PM in both locations.

The first shared working-hour row is 9:00 AM Chicago, which is Thu 3:00 PM London. Green rows in the table mark the full overlap.

Offset rules used

Chicago time follows the America/Chicago IANA rules, including seasonal daylight saving changes.

London alternates between GMT and British Summer Time according to Europe/London date rules.

From time zone

About Chicago

Chicago time follows the America/Chicago IANA rules, including seasonal daylight saving changes.

IANA identifier: America/Chicago

To time zone

About London

London alternates between GMT and British Summer Time according to Europe/London date rules.

IANA identifier: Europe/London

Related routes

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Accuracy

Date-aware time conversion

Offsets are resolved for the local date entered, rather than treating the current offset as permanent. This matters around daylight saving transitions and when locations change rules on different dates.

The converter uses the IANA time-zone database available in the browser. A local clock time skipped during a spring-forward transition is reported as invalid instead of silently changing the requested time.

Questions

Chicago to London FAQ

What is the time difference from Chicago to London?

London is currently 6 hours ahead of Chicago. City offsets can change with daylight saving time, so use the date-specific converter for another date.

How do I convert Chicago time to London?

Choose the local date and time in Chicago. The converter resolves that wall-clock time with America/Chicago, then formats the same instant in Europe/London.

Does Chicago to London change with daylight saving time?

It can. At least one selection uses date-aware city rules, and the two locations may start or end daylight saving time on different dates.