St.Catharines to Rio de Janeiro: time difference
Rio de Janeiro is 1 h ahead of St.Catharines. 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.
St.Catharines 02:50 2:50 AM Rio de Janeiro 03:50 3:50 AM You –:–
02:50 2:50 AM
Eastern Daylight Time · UTC-4
☀️ 07:38 · 🌙 18:26
03:50 3:50 AM
Brasilia Standard Time · UTC-3
☀️ 05:16 · 🌙 18:00
·
+1 h
Rio de Janeiro is 1 h ahead of St.Catharines.
When you, St.Catharines and Rio de Janeiro are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇨🇦 St.Catharines
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
🇧🇷 Rio de Janeiro
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 | 🇨🇦 St.Catharines | 🇧🇷 Rio de Janeiro |
|---|---|---|
| Local time | 02:50 | 03:50 |
| Local date | Wednesday, October 21, 2026 | Wednesday, October 21, 2026 |
| Time zone | Eastern Daylight Time | Brasilia Standard Time |
| UTC offset | UTC-4 | UTC-3 |
| Offset from St.Catharines | — | +1 h |
| IANA zone | America/Toronto | America/Sao Paulo |
| Daylight saving | On summer time → UTC-5, Nov 1, 01:00 | Not observed |
| Sunrise | 07:38 | 05:16 |
| Sunset | 18:26 | 18:00 |
| Daylight | 10 h 48 min | 12 h 44 min |
| People on this clock | 133,113 | 6,211,223 |
Compare St.Catharines with another city
More comparisons with St.Catharines: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
St.Catharines and Rio de Janeiro: common questions
What is the time difference between St.Catharines and Rio de Janeiro?
Rio de Janeiro is 1 hour ahead: it uses UTC−3, while St.Catharines is on UTC−4.
If it is 9:00 AM in St.Catharines, what time is it in Rio de Janeiro?
At 9:00 AM in St.Catharines, clocks in Rio de Janeiro show 10:00 AM.
If it is 6:00 PM in St.Catharines, what time is it in Rio de Janeiro?
At 6:00 PM in St.Catharines, clocks in Rio de Janeiro show 7:00 PM.
When is a good time to call Rio de Janeiro from St.Catharines?
Between 9:00 AM and 5:00 PM in St.Catharines – that is 10:00 AM to 6:00 PM in Rio de Janeiro – both places are within working hours (9:00 AM–6:00 PM).
When is it already the next day in Rio de Janeiro?
From 11:00 PM in St.Catharines it is already the next day in Rio de Janeiro. The other way round, until 1:00 AM in Rio de Janeiro it is still the previous day in St.Catharines.
Does the time difference between St.Catharines and Rio de Janeiro change?
Yes. The clocks change only in St.Catharines. From November 1, 2026, Rio de Janeiro will be 2 hours ahead of St.Catharines.
