What is the time difference between Kolkata and New York?

New York is 9 hours 30 minutes behind Kolkata. 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 New York from Kolkata?

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 Kolkata observe daylight saving time?

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

Does New York observe daylight saving time?

Yes. New York runs on UTC-5 in winter and UTC-4 in summer. The next change is on 2026-11-01, when clocks go back by 60 minutes.

If it is midday in Kolkata, what time is it in New York?

It is 02:30 in New York, 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 Kolkata and New York use?

Kolkata uses Asia/Kolkata, currently UTC+5:30 (IST), and New York uses America/New_York, currently UTC-4 (EDT). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.

Convert Kolkata time to New York time

New York is 9 hours 30 minutes behind Kolkata right now, so midday in Kolkata lands in the small hours in New York.

Convert a time

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Date

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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

Every hour of a day in Kolkata, and what the clock reads in New York at that same moment.

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

Daylight saving time

Kolkata keeps one offset all year while New York moves twice. That is the whole reason this difference is seasonal.

Kolkata

Does not observe daylight saving time

Standard: UTC+5:30

New York

Observes daylight saving time

Standard: UTC-5
Daylight: UTC-4
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.

Kolkata 09:00–18:00New York 23:30–08:30
Kolkata 18:30–03:30New York 09:00–18:00

Reference

The zone identifiers and offsets behind everything above.

	Kolkata	New York
IANA zone	Asia/Kolkata	America/New_York
Abbreviation	IST	EDT
Standard offset	UTC+5:30	UTC-5
Daylight offset	—	UTC-4
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 Kolkata and New York?: New York is 9 hours 30 minutes behind Kolkata. 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 New York from Kolkata?: 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 Kolkata observe daylight saving time?: No. Kolkata stays on UTC+5:30 all year, so its clocks never move.
Does New York observe daylight saving time?: Yes. New York runs on UTC-5 in winter and UTC-4 in summer. The next change is on 2026-11-01, when clocks go back by 60 minutes.
If it is midday in Kolkata, what time is it in New York?: It is 02:30 in New York, 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 Kolkata and New York use?: Kolkata uses Asia/Kolkata, currently UTC+5:30 (IST), and New York uses America/New_York, currently UTC-4 (EDT). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.