Chicago, United States Tehran, Iran
Compare time between Chicago and Tehran
Frequently Asked Questions
Chicago is in the CDT timezone (UTC-5) and Tehran is in the +0330 timezone (UTC+3:30). The time difference between them is 8h 30m.
Use the timeline above to find overlapping business hours between Chicago and Tehran. The "Best time to meet" card highlights the window where both cities are within working hours (9 AM – 6 PM local time).
Chicago observes Daylight Saving Time, while Tehran does not. When DST is active in Chicago, the time difference changes by 1 hour.
Click the pencil icon next to the Chicago clock and type any time. The Tehran clock will update instantly, showing the exact corresponding time. You can also pick a date to account for DST changes.