Offset
The time difference between Köln and Buenos Aires is 5 hours.
Köln (CEST) is ahead of Buenos Aires (ART).
CEST: UTC+2
ART: UTC-3
Köln is currently observing daylight saving time; Buenos Aires is not.
When to schedule
Business-hours overlap: 2 PM–5 PM in Köln (9 AM–12 PM in Buenos Aires).
Both teams are in working hours during this window on weekdays.
Suggested time: 3:00 PM Köln (10:00 AM Buenos Aires).
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
Argentina
- New Year's DayThu, Jan 1
- CarnivalMon, Feb 16
- CarnivalTue, Feb 17
- Day of Remembrance for Truth and JusticeTue, Mar 24
- Day of the Veterans and Fallen of the Malvinas WarThu, Apr 2
- Good FridayFri, Apr 3
- Labour DayFri, May 1
- May RevolutionMon, May 25
- Anniversary of the Passing of General Martín Miguel de GüemesMon, Jun 15
- General Manuel Belgrano Memorial DaySat, Jun 20
- Independence DayThu, Jul 9
- General José de San Martín Memorial DayMon, Aug 17
- Day of Respect for Cultural DiversityMon, Oct 12
- National Sovereignty DayMon, Nov 23
- Immaculate Conception DayTue, Dec 8
- Christmas DayFri, Dec 25
About these zones
Köln uses Central European Time (CET, or CEST). To call Germany, dial +49.
Buenos Aires uses Argentina Time (ART). To call Argentina, dial +54.
Buenos Aires is approximately 7,100 miles southwest of Köln.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| Köln | Buenos Aires | Day |
|---|---|---|
| 12:00 am | 7:00 pm | -1 day |
| 1:00 am | 8:00 pm | -1 day |
| 2:00 am | 9:00 pm | -1 day |
| 3:00 am | 10:00 pm | -1 day |
| 4:00 am | 11:00 pm | -1 day |
| 5:00 am | 12:00 am | Same day |
| 6:00 am | 1:00 am | Same day |
| 7:00 am | 2:00 am | Same day |
| 8:00 am | 3:00 am | Same day |
| 9:00 am | 4:00 am | Same day |
| 10:00 am | 5:00 am | Same day |
| 11:00 am | 6:00 am | Same day |
| 12:00 pm | 7:00 am | Same day |
| 1:00 pm | 8:00 am | Same day |
| 2:00 pm | 9:00 am | Same day |
| 3:00 pm | 10:00 am | Same day |
| 4:00 pm | 11:00 am | Same day |
| 5:00 pm | 12:00 pm | Same day |
| 6:00 pm | 1:00 pm | Same day |
| 7:00 pm | 2:00 pm | Same day |
| 8:00 pm | 3:00 pm | Same day |
| 9:00 pm | 4:00 pm | Same day |
| 10:00 pm | 5:00 pm | Same day |
| 11:00 pm | 6:00 pm | Same day |
Daylight saving time
Köln observes daylight saving time; Buenos Aires does not. The offset between the two zones changes when Köln 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
- 5:20 AM
- Sunset
- 9:44 PM
- Day length
- 16h 23m
- Sunrise
- 7:56 AM
- Sunset
- 5:51 PM
- Day length
- 9h 55m
Cities in these zones
Other cities in Central European Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Central European Time
- BER
- HAM
- LBC
- MUC
- CGN
- DUS
- FRA
- STR
Airports in Argentina Time
- AEP
- EZE
Related conversions
Common conversions
- What is 9:00 am Köln in Buenos Aires?
- 9:00 am Köln is 4:00 am Buenos Aires.
- What is 12:00 pm Köln in Buenos Aires?
- 12:00 pm Köln is 7:00 am Buenos Aires.
- What is 12:30 pm Köln in Buenos Aires?
- 12:30 pm Köln is 7:30 am Buenos Aires.
- What is 2:00 pm Köln in Buenos Aires?
- 2:00 pm Köln is 9:00 am Buenos Aires.
- What is 5:00 pm Köln in Buenos Aires?
- 5:00 pm Köln is 12:00 pm Buenos Aires.
- What is 11:30 pm Köln in Buenos Aires?
- 11:30 pm Köln is 6:30 pm Buenos Aires.