What is the time difference between Kolkata and Darwin?

Darwin is 4 hours ahead of Kolkata during standard time.

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

The best times to connect are 9:00 AM GMT+5:30, 10:00 AM GMT+5:30, 11:00 AM GMT+5:30, when both regions are within standard business hours.

Delhi to Darwin Time Converter — GMT+5:30 to GMT+9:30, 4 hours difference

24-Hour Overlap Timeline

✅ Overlap: 9:00 AM–2:00 PM in Delhi · 1:00 PM–6:00 PM in Darwin (5h 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 →
🇮🇳 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
🇦🇺 Darwin UTC+9:30	9a	10a	11a	12p	1p	2p	3p	4p	5p	6p	7p	8p	9p	10p	11p	12a	1a	2a	3a	4a	5a	6a	7a	8a
🇮🇳 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: Delhi (GMT+5:30) vs Darwin (GMT+9:30)

Time Gap

4h

Darwin ahead

DST Status

✅ Kolkata

No DST

✅ Darwin: No DST

Cities in GMT+5:30

600

Largest: Delhi

32,226,000 pop.

Overlap Window

5h window

9:00 AM – 2:00 PM (GMT+5:30)

1:00 PM – 6:00 PM (GMT+9:30)

Find Cities in Kolkata & Darwin Timezones

The GMT+5:30 and GMT+9:30 timezones are separated by 4 hours. Delhi is the largest city in the Asia/Kolkata zone and Darwin is the largest in Australia/Darwin. Neither timezone observes daylight saving time, so the difference is constant year-round. For scheduling between these regions, the key fact is: there are 5 hours of mutual business-hours overlap each day.

Best Times to Schedule Calls: Delhi (GMT+5:30) ↔ Darwin (GMT+9:30)

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

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

GMT+5:30 to GMT+9:30: Complete 24-Hour Time Conversion Table

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

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

600 Cities in Kolkata (GMT+5:30) & 1 Cities in Darwin (GMT+9:30) — Page 1 of 3

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

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Darwin & cities — Darwin (GMT+9:30, UTC+9:30)

Darwin, AU 140K

🇳🇳

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Convert Delhi (GMT+5:30) to Darwin (GMT+9:30) Time — 4 hours apart