Rio de Janeiro to Oyster Bay, NY: time difference
Oyster Bay, NY 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 21:00 9:00 PM Oyster Bay, NY 20:00 8:00 PM You –:–
21:00 9:00 PM
Brasilia Standard Time · UTC-3
☀️ 05:25 · 🌙 17:56
20:00 8:00 PM
Eastern Daylight Time · UTC-4
☀️ 07:01 · 🌙 18:21
·
−1 h
Oyster Bay, NY is 1 h behind Rio de Janeiro.
When you, Rio de Janeiro and Oyster Bay, NY 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
🇺🇸 Oyster Bay, NY
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 | 🇺🇸 Oyster Bay, NY |
|---|---|---|
| Local time | 21:00 | 20:00 |
| Local date | Sunday, October 11, 2026 | Sunday, October 11, 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/New York |
| Daylight saving | Not observed | On summer time → UTC-5, Nov 1, 01:00 |
| Sunrise | 05:25 | 07:01 |
| Sunset | 17:56 | 18:21 |
| Daylight | 12 h 31 min | 11 h 20 min |
| People on this clock | 6,211,223 | 301,332 |
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 Oyster Bay, NY: common questions
How far behind Rio de Janeiro is Oyster Bay, NY?
Oyster Bay is 1 hour behind Rio de Janeiro: UTC−4 against UTC−3.
If it is 9:00 AM in Rio de Janeiro, what time is it in Oyster Bay, NY?
At 9:00 AM in Rio de Janeiro, clocks in Oyster Bay show 8:00 AM.
What time is it in Oyster Bay, NY, at the end of the working day in Rio de Janeiro?
The working day in Rio de Janeiro ends at 6:00 PM; in Oyster Bay it is 5:00 PM at that moment.
When is a good time to call Oyster Bay, NY, 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 Oyster Bay – both places are within working hours (9:00 AM–6:00 PM).
When is it still the previous day in Oyster Bay, NY?
Until 1:00 AM in Rio de Janeiro it is still the previous day in Oyster Bay. The other way round, from 11:00 PM in Oyster Bay it is already the next day in Rio de Janeiro.
Does the time difference between Rio de Janeiro and Oyster Bay, NY, change?
Yes. The clocks change only in Oyster Bay. From November 1, 2026, Oyster Bay will be 2 hours behind Rio de Janeiro.
