Time Difference Between Chicago and Tehran
Chicago is 8h 30m behind Tehran. This difference shifts by an hour around daylight saving time changes.
Best time to connect
Standard working hours (9:00 AM–5:00 PM) in Chicago fall between 5:30 PM and 1:30 AM (next day) in Tehran.
Frequently asked questions
- How many hours is Tehran ahead of Chicago?
- Chicago is 8h 30m behind Tehran. Note that this changes by an hour across daylight saving time transitions.
- Do Chicago and Tehran observe daylight saving time?
- Chicago observes daylight saving time, and Tehran does not observe it. Because of that, the gap is 9h 30m for part of the year and 8h 30m for the rest.