CDT to GMT Time Converter

Convert Central Daylight Time (CDT) to Greenwich Mean Time (GMT). Both time zones are shown live below; current offset between them is 6 hours ahead.

Chicago · Central Daylight Time
05:59:43
Wednesday, May 6, 2026
CDT · UTC-05:00
London · Greenwich Mean Time
11:59:43
Wednesday, May 6, 2026
GMT+1 · UTC+01:00

Convert a specific time

From: CDT (Chicago)
To: GMT (London)
--:--

Daylight Saving status right now

CDT (Central Daylight Time)
Observes DST
Yes
In DST right now
Yes
Next fall back
2026-11-01
Offset shift
UTC-05:00 → UTC-06:00
GMT (Greenwich Mean Time)
Observes DST
Yes
In DST right now
Yes
Next fall back
2026-10-25
Offset shift
UTC+01:00 → UTC+00:00

When can CDT and GMT meet?

2 hours of overlap during standard 9am-5pm working hours.
Best meeting window: 09:00–10:00 CDT (15:00–16:00 GMT).

Hour-by-hour CDT to GMT conversion table

CDT time (Chicago)GMT time (London)Status
00:00 Wed06:00 WedOff-hours both sides
01:00 Wed07:00 WedOff-hours both sides
02:00 Wed08:00 WedOff-hours both sides
03:00 Wed09:00 WedGMT working
04:00 Wed10:00 WedGMT working
05:00 Wed11:00 WedGMT working
06:00 Wed12:00 WedGMT working
07:00 Wed13:00 WedGMT working
08:00 Wed14:00 WedGMT working
09:00 Wed15:00 WedBoth at work
10:00 Wed16:00 WedBoth at work
11:00 Wed17:00 WedCDT working
12:00 Wed18:00 WedCDT working
13:00 Wed19:00 WedCDT working
14:00 Wed20:00 WedCDT working
15:00 Wed21:00 WedCDT working
16:00 Wed22:00 WedCDT working
17:00 Wed23:00 WedOff-hours both sides
18:00 Wed00:00 ThuOff-hours both sides
19:00 Wed01:00 ThuOff-hours both sides
20:00 Wed02:00 ThuOff-hours both sides
21:00 Wed03:00 ThuOff-hours both sides
22:00 Wed04:00 ThuOff-hours both sides
23:00 Wed05:00 ThuOff-hours both sides

Times computed for today in each zone using the IANA time zone database. The conversion accounts for daylight saving time wherever applicable.

About these time zones

Central Daylight Time (CDT)
IANA identifier
America/Chicago
Current UTC offset
UTC-05:00
Current abbreviation
CDT
Major cities in this zone
ChicagoHoustonDallasAustinNew Orleans
Greenwich Mean Time (GMT)
IANA identifier
Europe/London
Current UTC offset
UTC+01:00
Current abbreviation
GMT+1
Major cities in this zone
LondonManchesterEdinburghBirmingham

Sun today in Chicago and London

Chicago
Sunrise
05:41
Sunset
19:55
Solar noon
12:48
Daylight
14h 13m
London
Sunrise
05:24
Sunset
20:31
Solar noon
12:58
Daylight
15h 6m

Related converters

GMT to CDT (reverse)CDT to ESTCDT to PSTCDT to UTCCDT to CETCDT to ISTEST to GMTPST to GMTUTC to GMTCET to GMTIST to GMT
Looking for local time? See time in Chicago or time in London.

Frequently asked questions

What is the time difference between CDT and GMT right now?+
GMT (Greenwich Mean Time) is currently 6 hours ahead CDT (Central Daylight Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does CDT or GMT observe daylight saving time?+
CDT: observes daylight saving time. GMT: observes daylight saving time.
When is the best time to schedule a meeting between CDT and GMT?+
The strongest overlap is 09:00–10:00 CDT (15:00–16:00 GMT), giving 2 hours when both sides are within standard 9am-5pm working hours.
What time is it in London when it is 12:00 noon in Chicago?+
When it is 12:00 Wed in Chicago (CDT), it is 18:00 Wed in London (GMT).
Which IANA time zone identifiers are used for CDT and GMT?+
CDT maps to "America/Chicago" in the IANA database. GMT maps to "Europe/London". These identifiers are what most software libraries use to convert times accurately, including DST handling.