London to Buenos Aires: time difference
Buenos Aires is 4 h behind London. Live clocks for both, the working hours they share, and how each one sits against your own time.
−4 h
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
London 00:48 12:48 AM Buenos Aires 20:48 8:48 PM You –:–
00:48 12:48 AM
British Summer Time · UTC+1
☀️ 07:14 · 🌙 18:23
20:48 8:48 PM
Argentina Standard Time · UTC-3
☀️ 06:20 · 🌙 19:03
·
−4 h
Buenos Aires is 4 h behind London.
When you, London and Buenos Aires are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇬🇧 London
0 12 AM 1 1 AM 2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM 21 9 PM 22 10 PM 23 11 PM
🇦🇷 Buenos Aires
20 8 PM 21 9 PM 22 10 PM 23 11 PM 0 12 AM 1 1 AM 2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇬🇧 London | 🇦🇷 Buenos Aires |
|---|---|---|
| Local time | 00:48 | 20:48 |
| Local date | Saturday, October 10, 2026 | Friday, October 9, 2026 |
| Time zone | British Summer Time | Argentina Standard Time |
| UTC offset | UTC+1 | UTC-3 |
| Offset from London | — | −4 h |
| IANA zone | Europe/London | America/Argentina/Buenos Aires |
| Daylight saving | On summer time → UTC+0, Oct 25, 01:00 | Not observed |
| Sunrise | 07:14 | 06:20 |
| Sunset | 18:23 | 19:03 |
| Daylight | 11 h 8 min | 12 h 43 min |
| People on this clock | 8,908,083 | 2,891,082 |
Compare London with another city
More comparisons with London: the time zones next to it and the far side of the clock.
Big time differences
London and Buenos Aires: common questions
How many hours behind London is Buenos Aires?
The clocks in Buenos Aires are 4 hours behind those in London (UTC−3 and UTC+1).
If it is 9:00 AM in London, what time is it in Buenos Aires?
At 9:00 AM in London, clocks in Buenos Aires show 5:00 AM.
If it is 6:00 PM in London, what time is it in Buenos Aires?
At 6:00 PM in London, clocks in Buenos Aires show 2:00 PM.
Is there a time when both London and Buenos Aires are at work?
Yes: from 1:00 PM to 6:00 PM in London (9:00 AM to 2:00 PM in Buenos Aires), the working days (9:00 AM–6:00 PM) overlap.
Until what time in London is it still yesterday in Buenos Aires?
Before 4:00 AM in London, the date in Buenos Aires has not changed yet. From 8:00 PM in Buenos Aires, it is already the next day in London.
Does the time difference between London and Buenos Aires change?
Yes. The clocks change only in London. From October 25, 2026, Buenos Aires will be 3 hours behind London.
