Offset
The time difference between Nairobi and Kolkata is 2.5 hours.
Nairobi (EAT) is behind Kolkata (IST).
EAT: UTC+3
IST: UTC+5:30
Neither Nairobi nor Kolkata is currently observing daylight saving time.
When to schedule
Business-hours overlap: 9 AM–3 PM in Nairobi (11 AM–5 PM in Kolkata).
Both teams are in working hours during this window on weekdays.
Suggested time: 12:00 PM Nairobi (2:30 PM Kolkata).
Public holidays in 2026
National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.
Kenya
- New Year's DayThu, Jan 1
- Good FridayFri, Apr 3
- Easter MondayMon, Apr 6
- Labour DayFri, May 1
- Madaraka DayMon, Jun 1
- Mazingira DaySat, Oct 10
- Mashujaa DayTue, Oct 20
- Jamhuri DaySat, Dec 12
- Christmas DayFri, Dec 25
- Boxing DaySat, Dec 26
About these zones
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| Nairobi | Kolkata | Day |
|---|---|---|
| 12:00 am | 2:30 am | Same day |
| 1:00 am | 3:30 am | Same day |
| 2:00 am | 4:30 am | Same day |
| 3:00 am | 5:30 am | Same day |
| 4:00 am | 6:30 am | Same day |
| 5:00 am | 7:30 am | Same day |
| 6:00 am | 8:30 am | Same day |
| 7:00 am | 9:30 am | Same day |
| 8:00 am | 10:30 am | Same day |
| 9:00 am | 11:30 am | Same day |
| 10:00 am | 12:30 pm | Same day |
| 11:00 am | 1:30 pm | Same day |
| 12:00 pm | 2:30 pm | Same day |
| 1:00 pm | 3:30 pm | Same day |
| 2:00 pm | 4:30 pm | Same day |
| 3:00 pm | 5:30 pm | Same day |
| 4:00 pm | 6:30 pm | Same day |
| 5:00 pm | 7:30 pm | Same day |
| 6:00 pm | 8:30 pm | Same day |
| 7:00 pm | 9:30 pm | Same day |
| 8:00 pm | 10:30 pm | Same day |
| 9:00 pm | 11:30 pm | Same day |
| 10:00 pm | 12:30 am | +1 day |
| 11:00 pm | 1:30 am | +1 day |
Daylight saving time
Neither Nairobi nor Kolkata observes daylight saving time. The offset between these zones remains constant year-round.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 6:31 AM
- Sunset
- 6:34 PM
- Day length
- 12h 3m
- Sunrise
- 4:52 AM
- Sunset
- 6:21 PM
- Day length
- 13h 28m
Daylight overlap: 9h 19m — 6:31 AM–3:51 PM in Nairobi (9:01 AM–6:21 PM in Kolkata). Both locations are in daylight during this window.
Cities in these zones
Other cities in East Africa Time
Other cities in India Standard Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in East Africa Time
- NBO
- WIL
- KIS
Airports in India Standard Time
- BOM
- NMI
- DEL
- BLR
- HYD
- AMD
- MAA
- CCU
- STV
- PNQ
Related conversions
Common conversions
- What is 9:00 am Nairobi in Kolkata?
- 9:00 am Nairobi is 11:30 am Kolkata.
- What is 12:00 pm Nairobi in Kolkata?
- 12:00 pm Nairobi is 2:30 pm Kolkata.
- What is 12:30 pm Nairobi in Kolkata?
- 12:30 pm Nairobi is 3:00 pm Kolkata.
- What is 2:00 pm Nairobi in Kolkata?
- 2:00 pm Nairobi is 4:30 pm Kolkata.
- What is 5:00 pm Nairobi in Kolkata?
- 5:00 pm Nairobi is 7:30 pm Kolkata.
- What is 11:30 pm Nairobi in Kolkata?
- 11:30 pm Nairobi is 2:00 am Kolkata, the next day.