Offset
The time difference between Kolkata and Frankfurt am Main is 3.5 hours.
Kolkata (IST) is ahead of Frankfurt am Main (CEST).
IST: UTC+5:30
CEST: UTC+2
Frankfurt am Main is currently observing daylight saving time; Kolkata is not.
When to schedule
Business-hours overlap: 1 PM–5 PM in Kolkata (9 AM–1 PM in Frankfurt am Main).
Both teams are in working hours during this window on weekdays.
Suggested time: 3:00 PM Kolkata (11:30 AM Frankfurt am Main).
This window may shift by an hour during daylight saving time.
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.
Germany
- New Year's DayThu, Jan 1
- Good FridayFri, Apr 3
- Easter MondayMon, Apr 6
- Labour DayFri, May 1
- Ascension DayThu, May 14
- Whit MondayMon, May 25
- German Unity DaySat, Oct 3
- Christmas DayFri, Dec 25
- St. Stephen's DaySat, Dec 26
About these zones
Kolkata uses India Standard Time (IST). To call India, dial +91.
Frankfurt am Main uses Central European Time (CET, or CEST). To call Germany, dial +49.
Frankfurt am Main is approximately 4,600 miles northwest of Kolkata.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| Kolkata | Frankfurt am Main | Day |
|---|---|---|
| 12:00 am | 8:30 pm | -1 day |
| 1:00 am | 9:30 pm | -1 day |
| 2:00 am | 10:30 pm | -1 day |
| 3:00 am | 11:30 pm | -1 day |
| 4:00 am | 12:30 am | Same day |
| 5:00 am | 1:30 am | Same day |
| 6:00 am | 2:30 am | Same day |
| 7:00 am | 3:30 am | Same day |
| 8:00 am | 4:30 am | Same day |
| 9:00 am | 5:30 am | Same day |
| 10:00 am | 6:30 am | Same day |
| 11:00 am | 7:30 am | Same day |
| 12:00 pm | 8:30 am | Same day |
| 1:00 pm | 9:30 am | Same day |
| 2:00 pm | 10:30 am | Same day |
| 3:00 pm | 11:30 am | Same day |
| 4:00 pm | 12:30 pm | Same day |
| 5:00 pm | 1:30 pm | Same day |
| 6:00 pm | 2:30 pm | Same day |
| 7:00 pm | 3:30 pm | Same day |
| 8:00 pm | 4:30 pm | Same day |
| 9:00 pm | 5:30 pm | Same day |
| 10:00 pm | 6:30 pm | Same day |
| 11:00 pm | 7:30 pm | Same day |
Daylight saving time
Frankfurt am Main observes daylight saving time; Kolkata does not. The offset between the two zones changes when Frankfurt am Main transitions: on Sunday, October 25, 2026, clocks fall back from CEST to CET.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 4:52 AM
- Sunset
- 6:21 PM
- Day length
- 13h 28m
- Sunrise
- 5:18 AM
- Sunset
- 9:33 PM
- Day length
- 16h 15m
Daylight overlap: 9h 33m — 8:48 AM–6:21 PM in Kolkata (5:18 AM–2:51 PM in Frankfurt am Main). Both locations are in daylight during this window.
Cities in these zones
Other cities in India Standard Time
Other cities in Central European Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in India Standard Time
- BOM
- NMI
- DEL
- BLR
- HYD
- AMD
- MAA
- CCU
- STV
- PNQ
Airports in Central European Time
- BER
- HAM
- LBC
- MUC
- CGN
- DUS
- FRA
- STR
Related conversions
Common conversions
- What is 9:00 am Kolkata in Frankfurt am Main?
- 9:00 am Kolkata is 5:30 am Frankfurt am Main.
- What is 12:00 pm Kolkata in Frankfurt am Main?
- 12:00 pm Kolkata is 8:30 am Frankfurt am Main.
- What is 12:30 pm Kolkata in Frankfurt am Main?
- 12:30 pm Kolkata is 9:00 am Frankfurt am Main.
- What is 2:00 pm Kolkata in Frankfurt am Main?
- 2:00 pm Kolkata is 10:30 am Frankfurt am Main.
- What is 5:00 pm Kolkata in Frankfurt am Main?
- 5:00 pm Kolkata is 1:30 pm Frankfurt am Main.
- What is 11:30 pm Kolkata in Frankfurt am Main?
- 11:30 pm Kolkata is 8:00 pm Frankfurt am Main.