Siena to Buenos Aires: time difference
Buenos Aires is 5 h behind Siena. 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.
Siena 18:35 6:35 PM Buenos Aires 13:35 1:35 PM You –:–
18:35 6:35 PM
Central European Summer Time · UTC+2
☀️ 07:31 · 🌙 18:30
13:35 1:35 PM
Argentina Standard Time · UTC-3
☀️ 06:10 · 🌙 19:10
·
−5 h
Buenos Aires is 5 h behind Siena.
When you, Siena 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
🇮🇹 Siena
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
19 7 PM 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
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇮🇹 Siena | 🇦🇷 Buenos Aires |
|---|---|---|
| Local time | 18:35 | 13:35 |
| Local date | Saturday, October 17, 2026 | Saturday, October 17, 2026 |
| Time zone | Central European Summer Time | Argentina Standard Time |
| UTC offset | UTC+2 | UTC-3 |
| Offset from Siena | — | −5 h |
| IANA zone | Europe/Rome | America/Argentina/Buenos Aires |
| Daylight saving | On summer time → UTC+1, Oct 25, 02:00 | Not observed |
| Sunrise | 07:31 | 06:10 |
| Sunset | 18:30 | 19:10 |
| Daylight | 10 h 59 min | 13 h |
| People on this clock | 53,903 | 2,891,082 |
Compare Siena with another city
More comparisons with Siena: the time zones next to it and the far side of the clock.
Big time differences
Siena and Buenos Aires: common questions
How far behind Siena is Buenos Aires?
Buenos Aires is 5 hours behind Siena: UTC−3 against UTC+2.
If it is 9:00 AM in Siena, what time is it in Buenos Aires?
At 9:00 AM in Siena, clocks in Buenos Aires show 4:00 AM.
If it is 6:00 PM in Siena, what time is it in Buenos Aires?
At 6:00 PM in Siena, clocks in Buenos Aires show 1:00 PM.
Is there a time when both Siena and Buenos Aires are at work?
Yes: from 2:00 PM to 6:00 PM in Siena (9:00 AM to 1:00 PM in Buenos Aires), the working days (9:00 AM–6:00 PM) overlap.
When does the date change in Buenos Aires compared with Siena?
The new day starts in Buenos Aires later: until 5:00 AM in Siena, it is still the previous day there. From 7:00 PM in Buenos Aires, Siena is already on the next day.
Is the time difference between Siena and Buenos Aires the same all year?
No. Only Siena switches to summer time, so the gap changes twice a year. From October 25, 2026, Buenos Aires will be 4 hours behind Siena.
