Koper to Buenos Aires: time difference
Buenos Aires is 5 h behind Koper. Live clocks for both, the working hours they share, and how each one sits against your own time.
−5 h
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Koper 22:18 10:18 PM Buenos Aires 17:18 5:18 PM You –:–
22:18 10:18 PM
Central European Summer Time · UTC+2
☀️ 07:27 · 🌙 18:15
17:18 5:18 PM
Argentina Standard Time · UTC-3
☀️ 06:07 · 🌙 19:11
·
−5 h
Buenos Aires is 5 h behind Koper.
When you, Koper 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
🇸🇮 Koper
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 | 🇸🇮 Koper | 🇦🇷 Buenos Aires |
|---|---|---|
| Local time | 22:18 | 17:18 |
| Local date | Monday, October 19, 2026 | Monday, October 19, 2026 |
| Time zone | Central European Summer Time | Argentina Standard Time |
| UTC offset | UTC+2 | UTC-3 |
| Offset from Koper | — | −5 h |
| IANA zone | Europe/Ljubljana | America/Argentina/Buenos Aires |
| Daylight saving | On summer time → UTC+1, Oct 25, 02:00 | Not observed |
| Sunrise | 07:27 | 06:07 |
| Sunset | 18:15 | 19:11 |
| Daylight | 10 h 48 min | 13 h 4 min |
| People on this clock | 24,900 | 2,891,082 |
Compare Koper with another city
More comparisons with Koper: the time zones next to it and the far side of the clock.
Big time differences
Koper and Buenos Aires: common questions
How many hours behind Koper is Buenos Aires?
The clocks in Buenos Aires are 5 hours behind those in Koper (UTC−3 and UTC+2).
If it is 9:00 AM in Koper, what time is it in Buenos Aires?
At 9:00 AM in Koper, clocks in Buenos Aires show 4:00 AM.
What time is it in Buenos Aires when it is 6:00 PM in Koper?
When it is 6:00 PM in Koper, it is 1:00 PM in Buenos Aires.
When do working hours in Koper and in Buenos Aires overlap?
Working hours (9:00 AM–6:00 PM) overlap from 2:00 PM to 6:00 PM in Koper, which is 9:00 AM to 1:00 PM in Buenos Aires.
When does the date change in Buenos Aires compared with Koper?
The new day starts in Buenos Aires later: until 5:00 AM in Koper, it is still the previous day there. From 7:00 PM in Buenos Aires, Koper is already on the next day.
Is the time difference between Koper and Buenos Aires the same all year?
No. Only Koper switches to summer time, so the gap changes twice a year. From October 25, 2026, Buenos Aires will be 4 hours behind Koper.
