Chicago, Illinois is the largest city in the U.S. Central time zone and the namesake of the IANA database identifier (America/Chicago) used by virtually every operating system and programming language to refer to the zone.
CDT time now — Chicago
Live Chicago time on the IANA America/Chicago zone, updated every second.
Chicago is the flagship city of the U.S. Central time zone (IANA: America/Chicago). Summer = CDT, UTC −5. Winter = CST, UTC −6.
Live Chicago (CDT)
8:46:45 PM
Thursday, Apr 16, 2026