CST to IST

On Tuesday 6 October 2026, India is 10 hours 30 minutes ahead of Chicago. Chicago is on CDT, and India is on IST. So 9:00 AM CDT in Chicago is 7:30 PM IST in India.

CST is Central Time's winter name. Chicago is on CDT until Sunday 1 November 2026.

In Kolkata

7:30 PM

Tuesday 6 October 2026IST

9:00 AM CDT in Chicago on Tuesday 6 October 2026 is 7:30 PM IST in Kolkata the same day.

Kolkata is 10 hours 30 minutes ahead of Chicago on this date.

From Sunday 1 November 2026, Kolkata is 11 hours 30 minutes ahead of Chicago.

Hours in Chicago and India

Hours in Chicago and India
ChicagoIndia
6:00 AM CDT4:30 PM IST
9:00 AM CDT7:30 PM IST
12:00 PM CDT10:30 PM IST
3:00 PM CDT1:30 AM IST the next day
6:00 PM CDT4:30 AM IST the next day
9:00 PM CDT7:30 AM IST the next day

When the gap changes

On Sunday 1 November 2026, clocks in Chicago go back.

From then, India is 11 hours 30 minutes ahead of Chicago.

On Sunday 14 March 2027, clocks in Chicago go forward.

From then, India is 10 hours 30 minutes ahead of Chicago.

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