Buenos Aires to Ottawa: time difference
Ottawa is 1 h behind Buenos Aires. 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.
Buenos Aires 00:16 12:16 AM Ottawa 23:16 11:16 PM You –:–
00:16 12:16 AM
Argentina Standard Time · UTC-3
☀️ 06:20 · 🌙 19:03
23:16 11:16 PM
Eastern Daylight Time · UTC-4
☀️ 07:12 · 🌙 18:30
·
−1 h
Ottawa is 1 h behind Buenos Aires.
When you, Buenos Aires and Ottawa 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
🇨🇦 Ottawa
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 19 7 PM 20 8 PM 21 9 PM 22 10 PM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇦🇷 Buenos Aires | 🇨🇦 Ottawa |
|---|---|---|
| Local time | 00:16 | 23:16 |
| Local date | Saturday, October 10, 2026 | Friday, October 9, 2026 |
| Time zone | Argentina Standard Time | Eastern Daylight Time |
| UTC offset | UTC-3 | UTC-4 |
| Offset from Buenos Aires | — | −1 h |
| IANA zone | America/Argentina/Buenos Aires | America/Toronto |
| Daylight saving | Not observed | On summer time → UTC-5, Nov 1, 01:00 |
| Sunrise | 06:20 | 07:12 |
| Sunset | 19:03 | 18:30 |
| Daylight | 12 h 43 min | 11 h 18 min |
| People on this clock | 2,891,082 | 1,000,000 |
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 Ottawa: common questions
What is the time difference between Buenos Aires and Ottawa?
Ottawa is 1 hour behind: it uses UTC−4, while Buenos Aires is on UTC−3.
What time is it in Ottawa when it is 9:00 AM in Buenos Aires?
When it is 9:00 AM in Buenos Aires, it is 8:00 AM in Ottawa.
If it is 6:00 PM in Buenos Aires, what time is it in Ottawa?
At 6:00 PM in Buenos Aires, clocks in Ottawa show 5:00 PM.
When do working hours in Buenos Aires and in Ottawa overlap?
Working hours (9:00 AM–6:00 PM) overlap from 10:00 AM to 6:00 PM in Buenos Aires, which is 9:00 AM to 5:00 PM in Ottawa.
When does the date change in Ottawa compared with Buenos Aires?
The new day starts in Ottawa later: until 1:00 AM in Buenos Aires, it is still the previous day there. From 11:00 PM in Ottawa, Buenos Aires is already on the next day.
Does the time difference between Buenos Aires and Ottawa change?
Yes. The clocks change only in Ottawa. From November 1, 2026, Ottawa will be 2 hours behind Buenos Aires.
