What is the time difference between New York and Kolkata?

Kolkata is 9 hours 30 minutes ahead of New York. 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 Kolkata from New York?

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 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.

Does Kolkata observe daylight saving time?

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

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

It is 21:30 in Kolkata, 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 New York and Kolkata use?

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

Convert New York time to Kolkata time

Kolkata is 9 hours 30 minutes ahead of New York right now, so midday in New York lands in the evening in Kolkata.

Convert a time

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Date

Time

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 New York, across for Kolkata.

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

Daylight saving time

New York changes its clocks; Kolkata does not. The difference between them therefore shifts by an hour twice a year.

New York

Observes daylight saving time

Standard: UTC-5
Daylight: UTC-4
Next change: 2026-11-01 −60m

Kolkata

Does not observe daylight saving time

Standard: UTC+5:30

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.

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

Reference

The zone identifiers and offsets behind everything above.

	New York	Kolkata
IANA zone	America/New_York	Asia/Kolkata
Abbreviation	EDT	IST
Standard offset	UTC-5	UTC+5:30
Daylight offset	UTC-4	—
Clock changes this year	2	0
Country	United States	India

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

Common questions

What is the time difference between New York and Kolkata?: Kolkata is 9 hours 30 minutes ahead of New York. 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 Kolkata from New York?: 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 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.
Does Kolkata observe daylight saving time?: No. Kolkata stays on UTC+5:30 all year, so its clocks never move.
If it is midday in New York, what time is it in Kolkata?: It is 21:30 in Kolkata, 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 New York and Kolkata use?: New York uses America/New_York, currently UTC-4 (EDT), and Kolkata uses Asia/Kolkata, currently UTC+5:30 (IST). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.