Offset
The time difference between Buenos Aires and London is 4 hours.
Buenos Aires (ART) is behind London (BST).
ART: UTC-3
BST: UTC+1
London 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 London).
Both teams are in working hours during this window on weekdays.
Suggested time: 11:00 AM Buenos Aires (3:00 PM London).
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
United Kingdom
- Good FridayFri, Apr 3
- Early May Bank HolidayMon, May 4
- Spring Bank HolidayMon, May 25
- Christmas DayFri, Dec 25
- St. Stephen's DayMon, Dec 28
About these zones
Buenos Aires uses Argentina Time (ART). To call Argentina, dial +54.
London uses Greenwich Mean Time (GMT, or BST). To call United Kingdom, dial +44.
London is approximately 6,900 miles northeast of Buenos Aires.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| Buenos Aires | London | 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
London observes daylight saving time; Buenos Aires does not. The offset between the two zones changes when London 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
- 7:55 AM
- Sunset
- 5:51 PM
- Day length
- 9h 56m
- Sunrise
- 4:47 AM
- Sunset
- 9:13 PM
- Day length
- 16h 25m
Daylight overlap: 9h 18m — 7:55 AM–5:13 PM in Buenos Aires (11:55 AM–9:13 PM in London). Both locations are in daylight during this window.
Cities in these zones
Other cities in Greenwich Mean Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Argentina Time
- AEP
- EZE
Airports in Greenwich Mean Time
- LCY
- LGW
- LHR
- LTN
- STN
- BHX
- EMA
- GLA
- PIK
- LBA
Related conversions
Common conversions
- What is 9:00 am Buenos Aires in London?
- 9:00 am Buenos Aires is 1:00 pm London.
- What is 12:00 pm Buenos Aires in London?
- 12:00 pm Buenos Aires is 4:00 pm London.
- What is 12:30 pm Buenos Aires in London?
- 12:30 pm Buenos Aires is 4:30 pm London.
- What is 2:00 pm Buenos Aires in London?
- 2:00 pm Buenos Aires is 6:00 pm London.
- What is 5:00 pm Buenos Aires in London?
- 5:00 pm Buenos Aires is 9:00 pm London.
- What is 11:30 pm Buenos Aires in London?
- 11:30 pm Buenos Aires is 3:30 am London, the next day.