Buenos Aires to Koper: time difference
Koper is 5 h ahead of Buenos Aires. 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.
Buenos Aires 17:51 5:51 PM Koper 22:51 10:51 PM You –:–
17:51 5:51 PM
Argentina Standard Time · UTC-3
☀️ 06:07 · 🌙 19:11
22:51 10:51 PM
Central European Summer Time · UTC+2
☀️ 07:27 · 🌙 18:15
·
+5 h
Koper is 5 h ahead of Buenos Aires.
When you, Buenos Aires and Koper are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇦🇷 Buenos Aires
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
🇸🇮 Koper
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 0 12 AM 1 1 AM 2 2 AM 3 3 AM 4 4 AM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇦🇷 Buenos Aires | 🇸🇮 Koper |
|---|---|---|
| Local time | 17:51 | 22:51 |
| Local date | Monday, October 19, 2026 | Monday, October 19, 2026 |
| Time zone | Argentina Standard Time | Central European Summer Time |
| UTC offset | UTC-3 | UTC+2 |
| Offset from Buenos Aires | — | +5 h |
| IANA zone | America/Argentina/Buenos Aires | Europe/Ljubljana |
| Daylight saving | Not observed | On summer time → UTC+1, Oct 25, 02:00 |
| Sunrise | 06:07 | 07:27 |
| Sunset | 19:11 | 18:15 |
| Daylight | 13 h 4 min | 10 h 48 min |
| People on this clock | 2,891,082 | 24,900 |
Compare Buenos Aires with another city
More comparisons with Buenos Aires: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Buenos Aires and Koper: common questions
How far ahead of Buenos Aires is Koper?
Koper is 5 hours ahead of Buenos Aires: UTC+2 against UTC−3.
What time is it in Koper at the start of the working day in Buenos Aires?
The working day in Buenos Aires starts at 9:00 AM; in Koper it is 2:00 PM at that moment.
What time is it in Koper at the end of the working day in Buenos Aires?
The working day in Buenos Aires ends at 6:00 PM; in Koper it is 11:00 PM at that moment.
Is there a time when both Buenos Aires and Koper are at work?
Yes: from 9:00 AM to 1:00 PM in Buenos Aires (2:00 PM to 6:00 PM in Koper), the working days (9:00 AM–6:00 PM) overlap.
When does the date change in Koper compared with Buenos Aires?
The new day starts in Koper earlier: at 7:00 PM in Buenos Aires it is already midnight there. Until 5:00 AM in Koper, Buenos Aires is still on the previous day.
Is the time difference between Buenos Aires and Koper the same all year?
No. Only Koper switches to summer time, so the gap changes twice a year. From October 25, 2026, Koper will be 4 hours ahead of Buenos Aires.
