Ottawa to Buenos Aires: time difference
Buenos Aires is 1 h ahead of Ottawa. Live clocks for both, the working hours they share, and how each one sits against your own time.
+1 h
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Ottawa 21:29 9:29 PM Buenos Aires 22:29 10:29 PM You –:–
21:29 9:29 PM
Eastern Daylight Time · UTC-4
☀️ 07:12 · 🌙 18:30
22:29 10:29 PM
Argentina Standard Time · UTC-3
☀️ 06:20 · 🌙 19:03
·
+1 h
Buenos Aires is 1 h ahead of Ottawa.
When you, Ottawa 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
🇨🇦 Ottawa
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
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 0 12 AM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇨🇦 Ottawa | 🇦🇷 Buenos Aires |
|---|---|---|
| Local time | 21:29 | 22:29 |
| Local date | Friday, October 9, 2026 | Friday, October 9, 2026 |
| Time zone | Eastern Daylight Time | Argentina Standard Time |
| UTC offset | UTC-4 | UTC-3 |
| Offset from Ottawa | — | +1 h |
| IANA zone | America/Toronto | America/Argentina/Buenos Aires |
| Daylight saving | On summer time → UTC-5, Nov 1, 01:00 | Not observed |
| Sunrise | 07:12 | 06:20 |
| Sunset | 18:30 | 19:03 |
| Daylight | 11 h 18 min | 12 h 43 min |
| People on this clock | 1,000,000 | 2,891,082 |
Compare Ottawa with another city
More comparisons with Ottawa: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Ottawa and Buenos Aires: common questions
What is the time difference between Ottawa and Buenos Aires?
Buenos Aires is 1 hour ahead: it uses UTC−3, while Ottawa is on UTC−4.
If it is 9:00 AM in Ottawa, what time is it in Buenos Aires?
At 9:00 AM in Ottawa, clocks in Buenos Aires show 10:00 AM.
If it is 6:00 PM in Ottawa, what time is it in Buenos Aires?
At 6:00 PM in Ottawa, clocks in Buenos Aires show 7:00 PM.
When is a good time to call Buenos Aires from Ottawa?
Between 9:00 AM and 5:00 PM in Ottawa – that is 10:00 AM to 6:00 PM in Buenos Aires – both places are within working hours (9:00 AM–6:00 PM).
When is it already the next day in Buenos Aires?
From 11:00 PM in Ottawa it is already the next day in Buenos Aires. The other way round, until 1:00 AM in Buenos Aires it is still the previous day in Ottawa.
Is the time difference between Ottawa and Buenos Aires the same all year?
No. Only Ottawa switches to summer time, so the gap changes twice a year. From November 1, 2026, Buenos Aires will be 2 hours ahead of Ottawa.
