Rio de Janeiro to Alert: time difference
Alert 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 21:35 9:35 PM Alert 20:35 8:35 PM You –:–
21:35 9:35 PM
Brasilia Standard Time · UTC-3
☀️ 05:22 · 🌙 17:57
20:35 8:35 PM
Eastern Daylight Time · UTC-4
☀️ 11:05 · 🌙 12:48
·
−1 h
Alert is 1 h behind Rio de Janeiro.
When you, Rio de Janeiro and Alert 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
🇨🇦 Alert
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 | 🇨🇦 Alert |
|---|---|---|
| Local time | 21:35 | 20:35 |
| 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/Iqaluit |
| Daylight saving | Not observed | On summer time → UTC-5, Nov 1, 01:00 |
| Sunrise | 05:22 | 11:05 |
| Sunset | 17:57 | 12:48 |
| Daylight | 12 h 35 min | 1 h 43 min |
| People on this clock | 6,211,223 | 60 |
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 Alert: common questions
How far behind Rio de Janeiro is Alert?
Alert is 1 hour behind Rio de Janeiro: UTC−4 against UTC−3.
What time is it in Alert at the start of the working day in Rio de Janeiro?
The working day in Rio de Janeiro starts at 9:00 AM; in Alert it is 8:00 AM at that moment.
What time is it in Alert at the end of the working day in Rio de Janeiro?
The working day in Rio de Janeiro ends at 6:00 PM; in Alert it is 5:00 PM at that moment.
When is a good time to call Alert from Rio de Janeiro?
Between 10:00 AM and 6:00 PM in Rio de Janeiro – that is 9:00 AM to 5:00 PM in Alert – both places are within working hours (9:00 AM–6:00 PM).
When is it still the previous day in Alert?
Until 1:00 AM in Rio de Janeiro it is still the previous day in Alert. The other way round, from 11:00 PM in Alert it is already the next day in Rio de Janeiro.
Is the time difference between Rio de Janeiro and Alert the same all year?
No. Only Alert switches to summer time, so the gap changes twice a year. From November 1, 2026, Alert will be 2 hours behind Rio de Janeiro.
