Greenwich to Buenos Aires: time difference
Buenos Aires is 4 h behind Greenwich. 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.
Greenwich 20:00 8:00 PM Buenos Aires 16:00 4:00 PM You –:–
20:00 8:00 PM
British Summer Time · UTC+1
☀️ 07:33 · 🌙 17:58
16:00 4:00 PM
Argentina Standard Time · UTC-3
☀️ 06:06 · 🌙 19:12
·
−4 h
Buenos Aires is 4 h behind Greenwich.
When you, Greenwich 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
🇬🇧 Greenwich
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 | 🇬🇧 Greenwich | 🇦🇷 Buenos Aires |
|---|---|---|
| Local time | 20:00 | 16:00 |
| Local date | Tuesday, October 20, 2026 | Tuesday, October 20, 2026 |
| Time zone | British Summer Time | Argentina Standard Time |
| UTC offset | UTC+1 | UTC-3 |
| Offset from Greenwich | — | −4 h |
| IANA zone | Europe/London | America/Argentina/Buenos Aires |
| Daylight saving | On summer time → UTC+0, Oct 25, 01:00 | Not observed |
| Sunrise | 07:33 | 06:06 |
| Sunset | 17:58 | 19:12 |
| Daylight | 10 h 26 min | 13 h 6 min |
| People on this clock | 285,000 | 2,891,082 |
Compare Greenwich with another city
More comparisons with Greenwich: the time zones next to it and the far side of the clock.
Big time differences
Greenwich and Buenos Aires: common questions
How far behind Greenwich is Buenos Aires?
Buenos Aires is 4 hours behind Greenwich: UTC−3 against UTC+1.
What time is it in Buenos Aires at the start of the working day in Greenwich?
The working day in Greenwich starts at 9:00 AM; in Buenos Aires it is 5:00 AM at that moment.
If it is 6:00 PM in Greenwich, what time is it in Buenos Aires?
At 6:00 PM in Greenwich, clocks in Buenos Aires show 2:00 PM.
When do working hours in Greenwich and in Buenos Aires overlap?
Working hours (9:00 AM–6:00 PM) overlap from 1:00 PM to 6:00 PM in Greenwich, which is 9:00 AM to 2:00 PM in Buenos Aires.
Until what time in Greenwich is it still yesterday in Buenos Aires?
Before 4:00 AM in Greenwich, the date in Buenos Aires has not changed yet. From 8:00 PM in Buenos Aires, it is already the next day in Greenwich.
Does the time difference between Greenwich and Buenos Aires change?
Yes. The clocks change only in Greenwich. From October 25, 2026, Buenos Aires will be 3 hours behind Greenwich.
