What is the time difference between Kolkata and Dubai?

Dubai is 1 hour 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 Dubai from Kolkata?

Between 10:30–18:00 in Kolkata, which is 09:00–16:30 in Dubai. That is the only stretch where both cities are inside a 09:00–18:00 day.

Does Kolkata observe daylight saving time?

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

Does Dubai observe daylight saving time?

No. Dubai stays on UTC+4 all year, so its clocks never move.

If it is midday in Kolkata, what time is it in Dubai?

It is 10:30 in Dubai, on the same calendar date. That holds for the current offsets; it does not change through the year, because neither city moves its clocks.

Which time zones do Kolkata and Dubai use?

Kolkata uses Asia/Kolkata, currently UTC+5:30 (IST), and Dubai uses Asia/Dubai, currently UTC+4 (GST). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.

Convert Kolkata time to Dubai time

Right now Dubai runs 1 hour 30 minutes behind Kolkata. That gap is not fixed: it moves when either city changes its clocks.

Convert a time

From

Date

Time

Converted time

—

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 Kolkata, across for Dubai.

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

Daylight saving time

Neither Kolkata nor Dubai changes its clocks, so the difference between them is the same every day of the year.

Kolkata

Does not observe daylight saving time

Standard: UTC+5:30

Dubai

Does not observe daylight saving time

Standard: UTC+4

When you can actually talk

The window is 7 hours 30 minutes wide — 10:30–18:00 in Kolkata, 09:00–16:30 in Dubai.

Kolkata 10:30–18:00Dubai 09:00–16:30

Reference

The zone identifiers and offsets behind everything above.

	Kolkata	Dubai
IANA zone	Asia/Kolkata	Asia/Dubai
Abbreviation	IST	GST
Standard offset	UTC+5:30	UTC+4
Daylight offset	—	—
Clock changes this year	0	0
Country	India	United Arab Emirates

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

Common questions

What is the time difference between Kolkata and Dubai?: Dubai is 1 hour 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 Dubai from Kolkata?: Between 10:30–18:00 in Kolkata, which is 09:00–16:30 in Dubai. That is the only stretch where both cities are inside a 09:00–18:00 day.
Does Kolkata observe daylight saving time?: No. Kolkata stays on UTC+5:30 all year, so its clocks never move.
Does Dubai observe daylight saving time?: No. Dubai stays on UTC+4 all year, so its clocks never move.
If it is midday in Kolkata, what time is it in Dubai?: It is 10:30 in Dubai, on the same calendar date. That holds for the current offsets; it does not change through the year, because neither city moves its clocks.
Which time zones do Kolkata and Dubai use?: Kolkata uses Asia/Kolkata, currently UTC+5:30 (IST), and Dubai uses Asia/Dubai, currently UTC+4 (GST). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.