Rio de Janeiro to Sarnia: time difference
Sarnia is 1 h behind Rio de Janeiro. 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.
Rio de Janeiro 23:21 11:21 PM Sarnia 22:21 10:21 PM You –:–
23:21 11:21 PM
Brasilia Standard Time · UTC-3
☀️ 05:22 · 🌙 17:57
22:21 10:21 PM
Eastern Daylight Time · UTC-4
☀️ 07:42 · 🌙 18:50
·
−1 h
Sarnia is 1 h behind Rio de Janeiro.
When you, Rio de Janeiro and Sarnia are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇧🇷 Rio de Janeiro
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
🇨🇦 Sarnia
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 | 🇧🇷 Rio de Janeiro | 🇨🇦 Sarnia |
|---|---|---|
| Local time | 23:21 | 22:21 |
| Local date | Wednesday, October 14, 2026 | Wednesday, October 14, 2026 |
| Time zone | Brasilia Standard Time | Eastern Daylight Time |
| UTC offset | UTC-3 | UTC-4 |
| Offset from Rio de Janeiro | — | −1 h |
| IANA zone | America/Sao Paulo | America/Toronto |
| Daylight saving | Not observed | On summer time → UTC-5, Nov 1, 01:00 |
| Sunrise | 05:22 | 07:42 |
| Sunset | 17:57 | 18:50 |
| Daylight | 12 h 35 min | 11 h 8 min |
| People on this clock | 6,211,223 | 71,594 |
Compare Rio de Janeiro with another city
More comparisons with Rio de Janeiro: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Rio de Janeiro and Sarnia: common questions
What is the time difference between Rio de Janeiro and Sarnia?
Sarnia is 1 hour behind: it uses UTC−4, while Rio de Janeiro is on UTC−3.
What time is it in Sarnia when it is 9:00 AM in Rio de Janeiro?
When it is 9:00 AM in Rio de Janeiro, it is 8:00 AM in Sarnia.
What time is it in Sarnia when it is 6:00 PM in Rio de Janeiro?
When it is 6:00 PM in Rio de Janeiro, it is 5:00 PM in Sarnia.
When do working hours in Rio de Janeiro and in Sarnia overlap?
Working hours (9:00 AM–6:00 PM) overlap from 10:00 AM to 6:00 PM in Rio de Janeiro, which is 9:00 AM to 5:00 PM in Sarnia.
When does the date change in Sarnia compared with Rio de Janeiro?
The new day starts in Sarnia later: until 1:00 AM in Rio de Janeiro, it is still the previous day there. From 11:00 PM in Sarnia, Rio de Janeiro is already on the next day.
Does the time difference between Rio de Janeiro and Sarnia change?
Yes. The clocks change only in Sarnia. From November 1, 2026, Sarnia will be 2 hours behind Rio de Janeiro.
