What is the time difference between Mumbai and Chicago?

Chicago is 10 hours 30 minutes behind Mumbai. That figure is current — it changes by an hour when either city starts or ends daylight saving, and the exact dates are listed above.

When is the best time to call Chicago from Mumbai?

There is no time inside normal working hours in both cities, so someone has to take the call outside them. The nearest workable windows are listed above — pick one and alternate who gets the awkward slot.

Does Mumbai observe daylight saving time?

No. Mumbai stays on UTC+5:30 all year, so its clocks never move.

Does Chicago observe daylight saving time?

Yes. Chicago runs on UTC-6 in winter and UTC-5 in summer. The next change is on 2026-11-01, when clocks go back by 60 minutes.

If it is midday in Mumbai, what time is it in Chicago?

It is 01:30 in Chicago, on the same calendar date. That holds for the current offsets; it shifts by an hour around the daylight saving dates listed above.

Which time zones do Mumbai and Chicago use?

Mumbai uses Asia/Kolkata, currently UTC+5:30 (IST), and Chicago uses America/Chicago, currently UTC-5 (CDT). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.

Convert Mumbai time to Chicago time

Chicago is 10 hours 30 minutes behind Mumbai right now, so midday in Mumbai lands in the small hours in Chicago.

Convert a time

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Converted time

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The converter needs JavaScript to run. Everything below — offsets, daylight saving dates and the hour-by-hour table — is part of the page and works without it.

Hour by hour

The whole day mapped across: read down the left for Mumbai, across for Chicago.

Mumbai	Chicago
00:00	13:30previous day
01:00	14:30previous day
02:00	15:30previous day
03:00	16:30previous day
04:00	17:30previous day
05:00	18:30previous day
06:00	19:30previous day
07:00	20:30previous day
08:00	21:30previous day
09:00	22:30previous day
10:00	23:30previous day
11:00	00:30
12:00	01:30
13:00	02:30
14:00	03:30
15:00	04:30
16:00	05:30
17:00	06:30
18:00	07:30
19:00	08:30
20:00	09:30
21:00	10:30
22:00	11:30
23:00	12:30

Daylight saving time

Chicago changes its clocks; Mumbai does not. The difference between them therefore shifts by an hour twice a year.

Mumbai

Does not observe daylight saving time

Standard: UTC+5:30

Chicago

Observes daylight saving time

Standard: UTC-6
Daylight: UTC-5
Next change: 2026-11-01 −60m

When you can actually talk

There is no hour where both cities are inside a 09:00–18:00 working day. Someone has to move — the nearest workable windows are below.

Mumbai 09:00–18:00Chicago 22:30–07:30
Mumbai 19:30–04:30Chicago 09:00–18:00

Reference

The zone identifiers and offsets behind everything above.

	Mumbai	Chicago
IANA zone	Asia/Kolkata	America/Chicago
Abbreviation	IST	CDT
Standard offset	UTC+5:30	UTC-6
Daylight offset	—	UTC-5
Clock changes this year	0	2
Country	India	United States

Example, not the current time. Live times appear once the page loads.

Common questions

What is the time difference between Mumbai and Chicago?: Chicago is 10 hours 30 minutes behind Mumbai. That figure is current — it changes by an hour when either city starts or ends daylight saving, and the exact dates are listed above.
When is the best time to call Chicago from Mumbai?: There is no time inside normal working hours in both cities, so someone has to take the call outside them. The nearest workable windows are listed above — pick one and alternate who gets the awkward slot.
Does Mumbai observe daylight saving time?: No. Mumbai stays on UTC+5:30 all year, so its clocks never move.
Does Chicago observe daylight saving time?: Yes. Chicago runs on UTC-6 in winter and UTC-5 in summer. The next change is on 2026-11-01, when clocks go back by 60 minutes.
If it is midday in Mumbai, what time is it in Chicago?: It is 01:30 in Chicago, on the same calendar date. That holds for the current offsets; it shifts by an hour around the daylight saving dates listed above.
Which time zones do Mumbai and Chicago use?: Mumbai uses Asia/Kolkata, currently UTC+5:30 (IST), and Chicago uses America/Chicago, currently UTC-5 (CDT). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.