What is the time difference between Halifax and Kolkata?

Kolkata is 9 hours 30 minutes ahead of Halifax during standard time. This may change by up to 1 hour when daylight saving time is active.

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

There is no standard business-hours overlap between Halifax and Kolkata. The closest window is around 7:00 AM AST / 4:00 PM GMT+5:30.

Halifax to Delhi Time Converter — AST to GMT+5:30, 9 hours 30 minutes difference

24-Hour Overlap Timeline

❌ No business-hours overlap between Halifax and Delhi (9–18 local)

⚠ Halifax observes daylight saving time — offset may vary by up to 1 hour seasonally

	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 →
🇨🇦 Halifax UTC-4	8p	9p	10p	11p	12a	1a	2a	3a	4a	5a	6a	7a	8a	9a	10a	11a	12p	1p	2p	3p	4p	5p	6p	7p
🇮🇳 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: Halifax (AST) vs Delhi (GMT+5:30)

Time Gap

9h 30m

Kolkata ahead

May vary ±1h (DST)

DST Status

⏰ Halifax

Observes DST

✅ Kolkata: No DST

Cities in AST

6

Largest: Halifax

439,819 pop.

Overlap Window

None

No work-hour overlap

Consider early/late meetings

Find Cities in Halifax & Kolkata Timezones

The AST and GMT+5:30 timezones are separated by 9 hours 30 minutes. Halifax is the largest city in the America/Halifax zone and Delhi is the largest in Asia/Kolkata. Halifax observes daylight saving time — the difference may change by 1 hour seasonally. For scheduling between these regions, the key fact is: there is no comfortable overlap during standard business hours.

Best Times to Schedule Calls: Halifax (AST) ↔ Delhi (GMT+5:30)

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

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

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

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

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

6 Cities in Halifax (AST) & 600 Cities in Kolkata (GMT+5:30) — Page 1 of 3

Halifax & 5 more — Halifax (AST, UTC-4)

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

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⚠️ Daylight Saving Time Affects This Pair

Timezone	DST?	Standard	Daylight
America/Halifax	Yes	UTC-4	UTC-3
Asia/Kolkata	No	UTC+5:30	—

During DST periods the time difference between these zones may be 8 hours 30 minutes instead of 9 hours 30 minutes. Always verify the current offset if scheduling calls near clock-change dates.

Convert Halifax (AST) to Delhi (GMT+5:30) Time — 9 hours 30 minutes apart