Rio de Janeiro to Buffalo, NY: time difference
Buffalo, 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 08:47 8:47 AM Buffalo, NY 07:47 7:47 AM You –:–
08:47 8:47 AM
Brasilia Standard Time · UTC-3
☀️ 05:26 · 🌙 17:55
07:47 7:47 AM
Eastern Daylight Time · UTC-4
☀️ 07:24 · 🌙 18:43
·
−1 h
Buffalo, NY is 1 h behind Rio de Janeiro.
When you, Rio de Janeiro and Buffalo, 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
🇺🇸 Buffalo, 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 | 🇺🇸 Buffalo, NY |
|---|---|---|
| Local time | 08:47 | 07:47 |
| Local date | Saturday, October 10, 2026 | Saturday, October 10, 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 | 05:26 | 07:24 |
| Sunset | 17:55 | 18:43 |
| Daylight | 12 h 30 min | 11 h 19 min |
| People on this clock | 6,211,223 | 258,071 |
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 Buffalo, NY: common questions
What is the time difference between Rio de Janeiro and Buffalo, NY?
Buffalo is 1 hour behind: it uses UTC−4, while Rio de Janeiro is on UTC−3.
What time is it in Buffalo, NY, at the start of the working day in Rio de Janeiro?
The working day in Rio de Janeiro starts at 9:00 AM; in Buffalo it is 8:00 AM at that moment.
What time is it in Buffalo, NY, 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 Buffalo.
Is there a time when both Rio de Janeiro and Buffalo, NY, are at work?
Yes: from 10:00 AM to 6:00 PM in Rio de Janeiro (9:00 AM to 5:00 PM in Buffalo), the working days (9:00 AM–6:00 PM) overlap.
When is it still the previous day in Buffalo, NY?
Until 1:00 AM in Rio de Janeiro it is still the previous day in Buffalo. The other way round, from 11:00 PM in Buffalo it is already the next day in Rio de Janeiro.
Does the time difference between Rio de Janeiro and Buffalo, NY, change?
Yes. The clocks change only in Buffalo. From November 1, 2026, Buffalo will be 2 hours behind Rio de Janeiro.
