🇵🇹 Castelo Branco, Portugal
14
- Western European Summer Time
- UTC+1
- Daytime
☀️ 07:45 · 🌙 18:46 · 11 h 2 min
Castelo Branco to Buenos Aires: time difference
Buenos Aires is 4 h behind Castelo Branco. 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.
Castelo Branco 13:27 1:27 PM Buenos Aires 09:27 9:27 AM You –:–
13:27 1:27 PM
Western European Summer Time · UTC+1
☀️ 07:45 · 🌙 18:46
09:27 9:27 AM
Argentina Standard Time · UTC-3
☀️ 06:07 · 🌙 19:11
·
−4 h
Buenos Aires is 4 h behind Castelo Branco.
When you, Castelo Branco 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
🇵🇹 Castelo Branco
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 | 🇵🇹 Castelo Branco | 🇦🇷 Buenos Aires |
|---|---|---|
| Local time | 13:27 | 09:27 |
| Local date | Monday, October 19, 2026 | Monday, October 19, 2026 |
| Time zone | Western European Summer Time | Argentina Standard Time |
| UTC offset | UTC+1 | UTC-3 |
| Offset from Castelo Branco | — | −4 h |
| IANA zone | Europe/Lisbon | America/Argentina/Buenos Aires |
| Daylight saving | On summer time → UTC+0, Oct 25, 01:00 | Not observed |
| Sunrise | 07:45 | 06:07 |
| Sunset | 18:46 | 19:11 |
| Daylight | 11 h 2 min | 13 h 4 min |
| People on this clock | 52,291 | 2,891,082 |
Compare Castelo Branco with another city
More comparisons with Castelo Branco: the time zones next to it and the far side of the clock.
Big time differences
Castelo Branco and Buenos Aires: common questions
What is the time difference between Castelo Branco and Buenos Aires?
Buenos Aires is 4 hours behind: it uses UTC−3, while Castelo Branco is on UTC+1.
If it is 9:00 AM in Castelo Branco, what time is it in Buenos Aires?
At 9:00 AM in Castelo Branco, clocks in Buenos Aires show 5:00 AM.
What time is it in Buenos Aires when it is 6:00 PM in Castelo Branco?
When it is 6:00 PM in Castelo Branco, it is 2:00 PM in Buenos Aires.
When do working hours in Castelo Branco and in Buenos Aires overlap?
Working hours (9:00 AM–6:00 PM) overlap from 1:00 PM to 6:00 PM in Castelo Branco, which is 9:00 AM to 2:00 PM in Buenos Aires.
When is it still the previous day in Buenos Aires?
Until 4:00 AM in Castelo Branco it is still the previous day in Buenos Aires. The other way round, from 8:00 PM in Buenos Aires it is already the next day in Castelo Branco.
Does the time difference between Castelo Branco and Buenos Aires change?
Yes. The clocks change only in Castelo Branco. From October 25, 2026, Buenos Aires will be 3 hours behind Castelo Branco.
