There is no overlap between 09:00–18:00 working days in these two places.
Clock changes in IST and Chicago
IST
India Standard Time (IST)
No daylight saving time.
Chicago
Central Daylight Time (CDT)
Next clock change Sun 1 Nov 2026 (UTC−5 → UTC−6)
Time difference between IST and Chicago today
Right now Chicago is 10.5 hours behind of IST. When it is 09:00 in IST, it is 22:30 in Chicago the previous day. IST is on India Standard Time (IST); Chicago is on Central Daylight Time (CDT).
When the IST to Chicago time difference changes
For most of the year Chicago is 10.5 hours behind of IST. From 1 November to 31 December 2026, Chicago is 11.5 hours behind of IST instead, because the two places change their clocks on different dates. Meetings booked by the usual gap land an hour off in those weeks.
Dates
Chicago vs IST
Length
8 March 2026 to 31 October 2026
10.5 hours behind
238 days
1 November 2026 to 31 December 2026
11.5 hours behind
61 days
1 January 2027 to 13 March 2027
11.5 hours behind
72 days
14 March 2027 to 6 November 2027
10.5 hours behind
238 days
7 November 2027 to 31 December 2027
11.5 hours behind
55 days
Best time for a meeting between IST and Chicago
When Chicago is 10.5 hours behind of IST: no shared 09:00 to 17:00 hours; try 18:00 in IST (07:30 in Chicago).
When Chicago is 11.5 hours behind of IST: no shared 09:00 to 17:00 hours; try 19:00 in IST (07:30 in Chicago).
Frequently asked questions about IST and Chicago time
What time is it in Chicago when it is 9:00 AM in IST?
22:30 today; Chicago is 10.5 hours behind of IST.
Does the time difference between IST and Chicago change?
Yes. It is usually 10.5 hours behind, but changes when one side moves its clocks: 11.5 hours behind from 1 November to 31 December 2026; 11.5 hours behind from 1 January to 13 March 2027.