What is the time difference between Dubai and Kolkata?

Kolkata is 1 hour 30 minutes ahead of Dubai during standard time.

When is the best time to schedule a call between Dubai and Kolkata?

The best times to connect are 9:00 AM GMT+4, 10:00 AM GMT+4, 11:00 AM GMT+4, when both regions are within standard business hours.

Dubai to Delhi Time Converter — GMT+4 to GMT+5:30, 1 hour 30 minutes difference

24-Hour Overlap Timeline

✅ Overlap: 9:00 AM–5:00 PM in Dubai · 10:00 AM–6:00 PM in Delhi (8h window)

	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23
UTC →
🇦🇪 Dubai UTC+4	4a	5a	6a	7a	8a	9a	10a	11a	12p	1p	2p	3p	4p	5p	6p	7p	8p	9p	10p	11p	12a	1a	2a	3a
🇮🇳 Delhi UTC+5:30	5a	6a	7a	8a	9a	10a	11a	12p	1p	2p	3p	4p	5p	6p	7p	8p	9p	10p	11p	12a	1a	2a	3a	4a
🇮🇳 India (IST) UTC+5:30	5a	6a	7a	8a	9a	10a	11a	12p	1p	2p	3p	4p	5p	6p	7p	8p	9p	10p	11p	12a	1a	2a	3a	4a

Both working Working Off hours Sleeping Now

Key Facts: Dubai (GMT+4) vs Delhi (GMT+5:30)

Time Gap

1h 30m

Kolkata ahead

DST Status

✅ Dubai

No DST

✅ Kolkata: No DST

Cities in GMT+4

71

Largest: Dubai

3,331,420 pop.

Overlap Window

8h window

9:00 AM – 5:00 PM (GMT+4)

10:00 AM – 6:00 PM (GMT+5:30)

Find Cities in Dubai & Kolkata Timezones

The GMT+4 and GMT+5:30 timezones are separated by 1 hour 30 minutes. Dubai is the largest city in the Asia/Dubai zone and Delhi is the largest in Asia/Kolkata. Neither timezone observes daylight saving time, so the difference is constant year-round. For scheduling between these regions, the key fact is: there are 8 hours of mutual business-hours overlap each day.

Best Times to Schedule Calls: Dubai (GMT+4) ↔ Delhi (GMT+5:30)

Dubai (GMT+4)	Kolkata (GMT+5:30)	Quality
5:00 AM	6:00 AM	❌
6:00 AM	7:00 AM	❌
7:00 AM	8:00 AM	⚠️
8:00 AM	9:00 AM	⚠️
9:00 AM	10:00 AM	✅
10:00 AM	11:00 AM	✅
11:00 AM	12:00 PM	✅
12:00 PM	1:00 PM	✅
1:00 PM	2:00 PM	✅
2:00 PM	3:00 PM	✅
3:00 PM	4:00 PM	✅
4:00 PM	5:00 PM	✅
5:00 PM	6:00 PM	⚠️
6:00 PM	7:00 PM	⚠️
7:00 PM	8:00 PM	❌
8:00 PM	9:00 PM	❌
9:00 PM	10:00 PM	❌

Work hours defined as 09:00–18:00 local time. ✅ Both in work hours ⚠️ Borderline ❌ Outside work hours.

GMT+4 to GMT+5:30: Complete 24-Hour Time Conversion Table

Dubai (GMT+4)	Kolkata (GMT+5:30)	IST (UTC+5:30)
12:00 AM	1:30 AM	1:30 AM
1:00 AM	2:30 AM	2:30 AM
2:00 AM	3:30 AM	3:30 AM
3:00 AM	4:30 AM	4:30 AM
4:00 AM	5:30 AM	5:30 AM
5:00 AM	6:30 AM	6:30 AM
6:00 AM	7:30 AM	7:30 AM
7:00 AM	8:30 AM	8:30 AM
8:00 AM	9:30 AM	9:30 AM
9:00 AM	10:30 AM	10:30 AM
10:00 AM	11:30 AM	11:30 AM
11:00 AM	12:30 PM	12:30 PM
12:00 PM	1:30 PM	1:30 PM
1:00 PM	2:30 PM	2:30 PM
2:00 PM	3:30 PM	3:30 PM
3:00 PM	4:30 PM	4:30 PM
4:00 PM	5:30 PM	5:30 PM
5:00 PM	6:30 PM	6:30 PM
6:00 PM	7:30 PM	7:30 PM
7:00 PM	8:30 PM	8:30 PM
8:00 PM	9:30 PM	9:30 PM
9:00 PM	10:30 PM	10:30 PM
10:00 PM	11:30 PM	11:30 PM
← Date changes in Kolkata →
11:00 PM	12:30 AM +1	12:30 AM

IST (India Standard Time, UTC+5:30) shown as reference for Indian users. +1/−1 indicates a different calendar day.

71 Cities in Dubai (GMT+4) & 600 Cities in Kolkata (GMT+5:30) — Page 1 of 3

Dubai & 70 more — Dubai (GMT+4, UTC+4)

Delhi & 599 more — Kolkata (GMT+5:30, UTC+5:30)

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Convert Dubai (GMT+4) to Delhi (GMT+5:30) Time — 1 hour 30 minutes apart