Buenos Aires to Thunder Bay: time difference
Thunder Bay 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 13:47 1:47 PM Thunder Bay 12:47 12:47 PM You –:–
13:47 1:47 PM
Argentina Standard Time · UTC-3
☀️ 06:09 · 🌙 19:11
12:47 12:47 PM
Eastern Daylight Time · UTC-4
☀️ 08:22 · 🌙 19:04
·
−1 h
Thunder Bay is 1 h behind Buenos Aires.
When you, Buenos Aires and Thunder Bay 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
🇨🇦 Thunder Bay
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 | 🇨🇦 Thunder Bay |
|---|---|---|
| Local time | 13:47 | 12:47 |
| Local date | Sunday, October 18, 2026 | Sunday, October 18, 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 | 06:09 | 08:22 |
| Sunset | 19:11 | 19:04 |
| Daylight | 13 h 2 min | 10 h 42 min |
| People on this clock | 2,891,082 | 107,909 |
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 Thunder Bay: common questions
How many hours behind Buenos Aires is Thunder Bay?
The clocks in Thunder Bay are 1 hour behind those in Buenos Aires (UTC−4 and UTC−3).
What time is it in Thunder Bay at the start of the working day in Buenos Aires?
The working day in Buenos Aires starts at 9:00 AM; in Thunder Bay it is 8:00 AM at that moment.
What time is it in Thunder Bay at the end of the working day in Buenos Aires?
The working day in Buenos Aires ends at 6:00 PM; in Thunder Bay it is 5:00 PM at that moment.
When is a good time to call Thunder Bay from Buenos Aires?
Between 10:00 AM and 6:00 PM in Buenos Aires – that is 9:00 AM to 5:00 PM in Thunder Bay – both places are within working hours (9:00 AM–6:00 PM).
When does the date change in Thunder Bay compared with Buenos Aires?
The new day starts in Thunder Bay later: until 1:00 AM in Buenos Aires, it is still the previous day there. From 11:00 PM in Thunder Bay, Buenos Aires is already on the next day.
Does the time difference between Buenos Aires and Thunder Bay change?
Yes. The clocks change only in Thunder Bay. From November 1, 2026, Thunder Bay will be 2 hours behind Buenos Aires.
