Lisbon to San Isidro: time difference
San Isidro is 4 h behind Lisbon. Live clocks for both, the working hours they share, and how each one sits against your own time.
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Lisbon 21:08 9:08 PM San Isidro 17:08 5:08 PM You –:–
21:08 9:08 PM
Western European Summer Time · UTC+1
☀️ 07:48 · 🌙 18:57
17:08 5:08 PM
Argentina Standard Time · UTC-3
☀️ 06:10 · 🌙 19:10
·
−4 h
San Isidro is 4 h behind Lisbon.
When you, Lisbon and San Isidro are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇵🇹 Lisbon
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
🇦🇷 San Isidro
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 | 🇵🇹 Lisbon | 🇦🇷 San Isidro |
|---|---|---|
| Local time | 21:08 | 17:08 |
| Local date | Saturday, October 17, 2026 | Saturday, October 17, 2026 |
| Time zone | Western European Summer Time | Argentina Standard Time |
| UTC offset | UTC+1 | UTC-3 |
| Offset from Lisbon | — | −4 h |
| IANA zone | Europe/Lisbon | America/Argentina/Buenos Aires |
| Daylight saving | On summer time → UTC+0, Oct 25, 01:00 | Not observed |
| Sunrise | 07:48 | 06:10 |
| Sunset | 18:57 | 19:10 |
| Daylight | 11 h 9 min | 13 h |
| People on this clock | 545,923 | 45,190 |
Compare Lisbon with another city
More comparisons with Lisbon: the time zones next to it and the far side of the clock.
Big time differences
Lisbon and San Isidro: common questions
How many hours behind Lisbon is San Isidro?
The clocks in San Isidro are 4 hours behind those in Lisbon (UTC−3 and UTC+1).
What time is it in San Isidro when it is 9:00 AM in Lisbon?
When it is 9:00 AM in Lisbon, it is 5:00 AM in San Isidro.
What time is it in San Isidro at the end of the working day in Lisbon?
The working day in Lisbon ends at 6:00 PM; in San Isidro it is 2:00 PM at that moment.
When is a good time to call San Isidro from Lisbon?
Between 1:00 PM and 6:00 PM in Lisbon – that is 9:00 AM to 2:00 PM in San Isidro – both places are within working hours (9:00 AM–6:00 PM).
When is it still the previous day in San Isidro?
Until 4:00 AM in Lisbon it is still the previous day in San Isidro. The other way round, from 8:00 PM in San Isidro it is already the next day in Lisbon.
Does the time gap between Lisbon and San Isidro change during the year?
Yes – daylight saving time is used in Lisbon but not in San Isidro. From October 25, 2026, San Isidro will be 3 hours behind Lisbon.
