Offset
The time difference between Buenos Aires and Lisbon is 4 hours.
Buenos Aires (ART) is behind Lisbon (BST).
ART: UTC-3
BST: UTC+1
Lisbon is currently observing daylight saving time; Buenos Aires is not.
When to schedule
Business-hours overlap: 9 AM–1 PM in Buenos Aires (1 PM–5 PM in Lisbon).
Both teams are in working hours during this window on weekdays.
Suggested time: 11:00 AM Buenos Aires (3:00 PM Lisbon).
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.
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
Portugal
- New Year's DayThu, Jan 1
- CarnivalTue, Feb 17
- Good FridayFri, Apr 3
- Easter SundaySun, Apr 5
- Freedom DaySat, Apr 25
- Labour DayFri, May 1
- Corpus ChristiThu, Jun 4
- National DayWed, Jun 10
- Assumption DaySat, Aug 15
- Republic DayMon, Oct 5
- All Saints DaySun, Nov 1
- Restoration of IndependenceTue, Dec 1
- Immaculate ConceptionTue, Dec 8
- Christmas DayFri, Dec 25
About these zones
Buenos Aires uses Argentina Time (ART). To call Argentina, dial +54.
Lisbon uses Greenwich Mean Time (GMT, or BST). To call Portugal, dial +351.
Lisbon is approximately 5,950 miles northeast of Buenos Aires.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| Buenos Aires | Lisbon | Day |
|---|---|---|
| 12:00 am | 4:00 am | Same day |
| 1:00 am | 5:00 am | Same day |
| 2:00 am | 6:00 am | Same day |
| 3:00 am | 7:00 am | Same day |
| 4:00 am | 8:00 am | Same day |
| 5:00 am | 9:00 am | Same day |
| 6:00 am | 10:00 am | Same day |
| 7:00 am | 11:00 am | Same day |
| 8:00 am | 12:00 pm | Same day |
| 9:00 am | 1:00 pm | Same day |
| 10:00 am | 2:00 pm | Same day |
| 11:00 am | 3:00 pm | Same day |
| 12:00 pm | 4:00 pm | Same day |
| 1:00 pm | 5:00 pm | Same day |
| 2:00 pm | 6:00 pm | Same day |
| 3:00 pm | 7:00 pm | Same day |
| 4:00 pm | 8:00 pm | Same day |
| 5:00 pm | 9:00 pm | Same day |
| 6:00 pm | 10:00 pm | Same day |
| 7:00 pm | 11:00 pm | Same day |
| 8:00 pm | 12:00 am | +1 day |
| 9:00 pm | 1:00 am | +1 day |
| 10:00 pm | 2:00 am | +1 day |
| 11:00 pm | 3:00 am | +1 day |
Daylight saving time
Lisbon observes daylight saving time; Buenos Aires does not. The offset between the two zones changes when Lisbon transitions: on Sunday, October 25, 2026, clocks fall back from BST to GMT.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 7:57 AM
- Sunset
- 5:50 PM
- Day length
- 9h 54m
- Sunrise
- 6:13 AM
- Sunset
- 9:00 PM
- Day length
- 14h 48m
Daylight overlap: 9h 4m — 7:57 AM–5:00 PM in Buenos Aires (11:57 AM–9:00 PM in Lisbon). Both locations are in daylight during this window.
Airports in these zones
Airports in Argentina Time
- AEP
- EZE
Airports in Greenwich Mean Time
- CAT
- LIS
Related conversions
Common conversions
- What is 9:00 am Buenos Aires in Lisbon?
- 9:00 am Buenos Aires is 1:00 pm Lisbon.
- What is 12:00 pm Buenos Aires in Lisbon?
- 12:00 pm Buenos Aires is 4:00 pm Lisbon.
- What is 12:30 pm Buenos Aires in Lisbon?
- 12:30 pm Buenos Aires is 4:30 pm Lisbon.
- What is 2:00 pm Buenos Aires in Lisbon?
- 2:00 pm Buenos Aires is 6:00 pm Lisbon.
- What is 5:00 pm Buenos Aires in Lisbon?
- 5:00 pm Buenos Aires is 9:00 pm Lisbon.
- What is 11:30 pm Buenos Aires in Lisbon?
- 11:30 pm Buenos Aires is 3:30 am Lisbon, the next day.