Central Daylight Time (cdt) is used in USA. The IANA timezone identifier is America/Chicago.

Greenwich Mean Time (gmt) is used in United Kingdom. The IANA timezone identifier is Europe/London.

CDT to GMT Time Converter

Central Daylight Time → Greenwich Mean Time

CDT = UTC-5GMT = UTC+1

ClockinSync

BASE

09:00

Work Clients Team +

00:0006:0012:0018:0024:00

GMT (London)

United Kingdom · +6h

15:00

New York

USA · +1h

10:00

Tokyo

Japan · +14h

23:00

Dubai

United Arab Emirates · +9h

18:00

Sydney

Australia · +15h

00:00+1 day

How far apart are CDT (Chicago) and GMT (London)?

CDT (Chicago) is 6 hours behind GMT (London). At noon in CDT (Chicago), your contact in GMT (London) sees 18:00.

CDT (Chicago) is in the America/Chicago timezone. GMT (London) is in Europe/London. The difference is 6 hours.

Daily overlap window

CDT (Chicago) and GMT (London) share 2 hours of overlapping business hours daily — enough for real-time collaboration without anyone joining at odd hours.

00:0006:0012:0018:0024:00

CDT (Chicago)

GMT (London)

Overlap (2h)

Recommended meeting windows

Both CDT (Chicago) and GMT (London) are in standard hours simultaneously for 2h per day.

09:00 Chicago / 15:00 London✓ Both working

10:00 Chicago / 16:00 London✓ Both working

Based on standard 09:00–17:00 working hours in each location's local time.

Public holidays for both locations

⚡ Holiday alerts for both locations, double-check schedules before confirming.

CDT (Chicago)7 holidays

Jul 3Independence DaySOON

Sep 7Labour Day

Oct 12Columbus Day

Oct 12Indigenous Peoples' Day

Nov 11Veterans Day

GMT (London)6 holidays

Jul 13Battle of the Boyne

Aug 3Summer Bank Holiday

Aug 31Summer Bank Holiday

Nov 30Saint Andrew's Day

Dec 25Christmas Day

Scheduling between CDT (Chicago) and GMT (London)

CDT (Chicago) (USA) leads GMT (London) (United Kingdom) by 6 hours. Despite the gap, a 2-hour window of shared business hours each day keeps real-time collaboration practical for both sides.

💡 Scheduling tips for these locations

✅

09:00–10:00 in CDT (Chicago) = 15:00–16:00 in GMT (London). Both sides are in standard business hours during this window.

✅

10:00–11:00 in CDT (Chicago) = 16:00–17:00 in GMT (London). Both sides are in standard business hours during this window.

DST transitions can silently shift your meeting times by an hour. The ClockinSync Chrome Extension tracks these changes automatically so you never get caught off guard.

Get the Extension — Free →

Use the time slider above to find the exact equivalent time for any moment in CDT (Chicago). The input bar accepts natural language like "3pm", "15:30", or "9am Rome" for instant conversions.

CDT (Chicago) ↔ GMT (London)

2h of business hours overlap daily (09:00–17:00)

CDT (Chicago)

GMT (London)

00:00

06:00

01:00

07:00

02:00

08:00