Airport in Illinois
Chicago Midway International Airport (MDW / KMDW) is a major international airport serving Illinois directly.
Current local time at the airport is 17:59:38.
Daylight saving time changes in Illinois, United States
Illinois uses the IANA time zone identifier America/Chicago. The current local offset is UTC-5 / CDT.
Next change: November 1, 2026
Clock moves back from 02:00 to 01:00 local time.
Best Time to Call Illinois
Business hours in Illinois (9 AM-5 PM local time) fall at these local times elsewhere:
- Sao Paulo: 11:00 AM - 7:00 PM ( Convenient)
- Frankfurt: 4:00 PM - 12:00 AM (next day) ( Partial overlap)
- Johannesburg: 4:00 PM - 12:00 AM (next day) ( Partial overlap)
- Singapore: 10:00 PM - 6:00 AM (next day) ( Outside normal hours)
- Hong Kong: 10:00 PM - 6:00 AM (next day) ( Outside normal hours)
- Istanbul: 5:00 PM - 1:00 AM (next day) ( Partial overlap)
- Auckland: 3:00 AM (next day) - 11:00 AM (next day) ( Outside normal hours)
Times shown reflect current UTC offsets and may shift by up to an hour around daylight saving transitions.
Time Difference from Illinois
Compare time in Illinois with major cities worldwide.
Current Time in Cities of Illinois, United States
About Time in Illinois
The Day Chicago Invented American Time
Standard time as the United States knows it today was born in a Chicago hotel room. On October 11, 1883, railroad executives gathered at the Grand Pacific Hotel, on the corner of Jackson and LaSalle in downtown Chicago, for the General Time Convention, and adopted engineer William F. Allen's plan to divide the country into four equal time zones, each exactly one hour apart. The vote passed overwhelmingly.
The actual switch, scheduled for noon on November 18, 1883, became known nationwide as the Day of Two Noons. A Chicago Tribune reporter at the city's railroad depot that day captured the moment vividly: conductors and engineers stood watching their pocket watches as the office clock ticked toward twelve, Depot Master Cropsy inspecting his chronometer under a magnifying glass to avoid any mistake. When the clock struck noon, it was stopped entirely, held motionless for nine minutes and thirty two seconds, then reset forward to the new standard time. Clocks in railroad stations and jewelers' shop windows across the city did the same, and Chicagoans reportedly greeted each other on the street that day by asking, "Have you the new time?"
The Grand Pacific Hotel itself is long gone, demolished decades later, but the building that eventually rose on the same site carries a name that remembers exactly what happened there: the Central Standard Building, a quiet permanent nod to the moment Chicago set the clock for the entire country.
The One City Crossed by Both Great American Eclipses
Carbondale, in southern Illinois, holds a genuinely rare astronomical distinction. It sits almost precisely at the point where the paths of the 2017 and 2024 total solar eclipses crossed each other, the only place in the country to fall within the path of totality for both of the recent coast to coast eclipses that swept across America within a single decade.
Local officials leaned fully into the nickname that followed, calling Carbondale "America's Eclipse City" after the second event confirmed the city's unusual astronomical luck. Southern Illinois University, based in Carbondale, hosted major public viewing events for both eclipses, and city leaders explicitly celebrated experiencing what amounts to a once in many lifetimes coincidence not once but twice within seven years.
Frequently Asked Questions
What time zone is Illinois in?
The whole of Illinois uses the America/Chicago time zone (CDT). Local time is 5 hours behind UTC (UTC-5), and all cities in the region show the same time.
Is the time in Illinois the same as in Washington?
No. Chicago, the main city of Illinois, is currently 1 hour behind Washington, the capital of United States.
Do clocks change in Illinois?
Yes. The next clock change in Illinois is on November 1, 2026, when clocks move back from 02:00 to 01:00 local time.
What is the main city of Illinois?
Chicago is the main city of Illinois, with a population of about 2,664,452. The time, sunrise and sunset shown on this page are based on Chicago.
Which airport is closest to Chicago?
Chicago Midway International Airport (MDW) serves Chicago directly. Flight arrival and departure times there are shown in local time.
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