Current time in Chicago, United States
The current local time in Chicago is shown below. Chicago observes CST in winter and CDT during daylight saving time.
Daylight saving time
Sunrise & sunset today
Timezone facts
Chicago in context
Chicago sits on the south-western shore of Lake Michigan, the third-largest city in the United States by population with around 2.7 million residents and a metropolitan area of close to 9.5 million across northeastern Illinois and the southern tip of Wisconsin. The flat Midwestern landscape allowed an early grid street pattern to extend uniformly across the prairie, with the downtown Loop and the elevated railway lines that give the district its name still anchoring the central business core.
Timezone history of Chicago
Chicago is the historical centre of the US railroad system, and the 1883 introduction of standard time across the country was coordinated from local railway offices: William Allen's General Time Convention, which agreed the new zone boundaries, met in the city in October that year. Today the Chicago Mercantile Exchange anchors much of the world's futures trading and operates a near-continuous overnight electronic session, with traditional pit hours running from 08:30 to 13:00 local time when they still apply.
Working hours in Chicago
Chicago working hours are more conventionally 09:00 to 17:00 than either coast, with the financial floor of the CME and the major banks running earlier to match Asian and European markets. The city's harsh winters shape commute timing and informal dress codes, with many office workers timing lunch around the heated indoor walkways of the Pedway system. Public holidays follow the federal calendar, with the Chicago marathon weekend in early October producing a city-wide event that disrupts traffic but otherwise tracks Eastern Time office norms.