Does Chicago observe daylight saving time?

Yes. Chicago is on CDT (UTC-5) now, and its clocks go back 1 hour on Sun, Nov 1, to CST (UTC-6).

Does Kolkata observe daylight saving time?

No. Kolkata stays on IST (UTC+5:30) all year, so its clocks don't change.

What time is it in Kolkata when it's 9 AM in Chicago?

7:30 PM in Kolkata, on the same day.

Chicago to Kolkata Meeting Planner

Kolkata is 10 hours 30 minutes ahead of Chicago right now. Their working days don't overlap today.

Chicago · United States

6:11 PM

Sat, Oct 17 · CDT · summer time

Kolkata · India

4:41 AM

Sun, Oct 18 · IST

Best Meeting Times Between Chicago and Kolkata

No time falls inside working hours (9 AM to 5 PM) in both cities. The closest is 9:00 AM in Chicago, which is 7:30 PM in Kolkata; consider splitting into two shorter meetings or shifting someone's hours.

Who's meeting

2 of 4 places

ChicagoOrganizerUnited States ·· summer time6:11PMnow
KolkataIndia ·4:41AMTomorrow · now

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Add up to 4 places by city, country, time zone or abbreviation, like Tokyo, India or JST. Press "/" to jump here.

Date in Chicago

Working hours, everywhere

Best times to meet

Saturday, October 17, 2026, in Chicago time.

9:00AMBest · GoodWorking hours in Chicago (09:00); just outside working hours in Kolkata (19:30).
12:00PMOption 2 · PossibleWorking hours in Chicago (12:00); late evening in Kolkata (22:30).
11:30AMOption 3 · PossibleWorking hours in Chicago (11:30); late evening in Kolkata (22:00).

The whole day

Pick any slot in the Fit row, or use the arrow keys there, to make it the meeting time.

Each column is a half hour of the first place's day. The Fit row grades how well the slot suits everyone; each row shows the local time and whether it's working hours there.
Fit
ChicagoCDT
KolkataIST
UTC	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04

Working hours (09–17)Just outside (07–09, 17–20)Late evening (20–23)NightFit: optimal, good, possible, poor

Your meeting

Chicago9:00 AM CDTSat, Oct 17
Kolkata7:30 PM ISTSat, Oct 17
UTC2026-10-17 14:00 UTC

What will it cost? Try the meeting cost calculator.

Time difference between Chicago and Kolkata

Kolkata is 10 hours 30 minutes ahead of Chicago right now: Kolkata is on IST (UTC+5:30) and Chicago on CDT (UTC-5). That changes on Sun, Nov 1, when clocks go back in Chicago: then Kolkata is 11 hours 30 minutes ahead of Chicago.

Time difference between Chicago and Kolkata over the next 12 months
From	Difference	Why
Now	Kolkata 10 hours 30 minutes ahead	—
Sun, Nov 1	Kolkata 11 hours 30 minutes ahead	Clocks go back in Chicago
Sun, Mar 14, 2027	Kolkata 10 hours 30 minutes ahead	Clocks go forward in Chicago

Chicago is on Central Standard Time. Kolkata is on India Standard Time.

Frequently Asked Questions: Chicago & Kolkata Scheduling

What is the time difference between Chicago and Kolkata?: Kolkata is 10 hours 30 minutes ahead of Chicago right now: Kolkata is on IST (UTC+5:30) and Chicago on CDT (UTC-5). That changes on Sun, Nov 1, when clocks go back in Chicago: then Kolkata is 11 hours 30 minutes ahead of Chicago.
What is the best time to schedule a meeting between Chicago and Kolkata?: No time falls inside working hours (9 AM to 5 PM) in both cities. The closest is 9:00 AM in Chicago, which is 7:30 PM in Kolkata; consider splitting into two shorter meetings or shifting someone's hours.
Does Chicago observe daylight saving time?: Yes. Chicago is on CDT (UTC-5) now, and its clocks go back 1 hour on Sun, Nov 1, to CST (UTC-6).
Does Kolkata observe daylight saving time?: No. Kolkata stays on IST (UTC+5:30) all year, so its clocks don't change.
What time is it in Kolkata when it's 9 AM in Chicago?: 7:30 PM in Kolkata, on the same day.

Or see every city pair, or plan with more places in the meeting planner.