Constanta to Buenos Aires: time difference
Buenos Aires is 6 h behind Constanta. Live clocks for both, the working hours they share, and how each one sits against your own time.
−6 h
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Constanta 03:55 3:55 AM Buenos Aires 21:55 9:55 PM You –:–
03:55 3:55 AM
Eastern European Summer Time · UTC+3
☀️ 07:14 · 🌙 18:32
21:55 9:55 PM
Argentina Standard Time · UTC-3
☀️ 06:20 · 🌙 19:03
·
−6 h
Buenos Aires is 6 h behind Constanta.
When you, Constanta 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
🇷🇴 Constanta
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
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 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
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇷🇴 Constanta | 🇦🇷 Buenos Aires |
|---|---|---|
| Local time | 03:55 | 21:55 |
| Local date | Saturday, October 10, 2026 | Friday, October 9, 2026 |
| Time zone | Eastern European Summer Time | Argentina Standard Time |
| UTC offset | UTC+3 | UTC-3 |
| Offset from Constanta | — | −6 h |
| IANA zone | Europe/Bucharest | America/Argentina/Buenos Aires |
| Daylight saving | On summer time → UTC+2, Oct 25, 03:00 | Not observed |
| Sunrise | 07:14 | 06:20 |
| Sunset | 18:32 | 19:03 |
| Daylight | 11 h 18 min | 12 h 43 min |
| People on this clock | 283,872 | 2,891,082 |
Compare Constanta with another city
More comparisons with Constanta: the time zones next to it and the far side of the clock.
Big time differences
Constanta and Buenos Aires: common questions
How many hours behind Constanta is Buenos Aires?
The clocks in Buenos Aires are 6 hours behind those in Constanta (UTC−3 and UTC+3).
If it is 9:00 AM in Constanta, what time is it in Buenos Aires?
At 9:00 AM in Constanta, clocks in Buenos Aires show 3:00 AM.
What time is it in Buenos Aires at the end of the working day in Constanta?
The working day in Constanta ends at 6:00 PM; in Buenos Aires it is 12:00 PM at that moment.
When is a good time to call Buenos Aires from Constanta?
Between 3:00 PM and 6:00 PM in Constanta – that is 9:00 AM to 12:00 PM in Buenos Aires – both places are within working hours (9:00 AM–6:00 PM).
Until what time in Constanta is it still yesterday in Buenos Aires?
Before 6:00 AM in Constanta, the date in Buenos Aires has not changed yet. From 6:00 PM in Buenos Aires, it is already the next day in Constanta.
Does the time gap between Constanta and Buenos Aires change during the year?
Yes – daylight saving time is used in Constanta but not in Buenos Aires. From October 25, 2026, Buenos Aires will be 5 hours behind Constanta.
