Dayton, OH to Rio de Janeiro: time difference
Rio de Janeiro is 1 h ahead of Dayton, OH. 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.
Dayton, OH 20:28 8:28 PM Rio de Janeiro 21:28 9:28 PM You –:–
20:28 8:28 PM
Eastern Daylight Time · UTC-4
☀️ 07:53 · 🌙 18:52
21:28 9:28 PM
Brasilia Standard Time · UTC-3
☀️ 05:17 · 🌙 18:00
·
+1 h
Rio de Janeiro is 1 h ahead of Dayton, OH.
When you, Dayton, OH 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
🇺🇸 Dayton, OH
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
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Time zones side by side
| Detail | 🇺🇸 Dayton, OH | 🇧🇷 Rio de Janeiro |
|---|---|---|
| Local time | 20:28 | 21:28 |
| Local date | Tuesday, October 20, 2026 | Tuesday, October 20, 2026 |
| Time zone | Eastern Daylight Time | Brasilia Standard Time |
| UTC offset | UTC-4 | UTC-3 |
| Offset from Dayton, OH | — | +1 h |
| IANA zone | America/New York | America/Sao Paulo |
| Daylight saving | On summer time → UTC-5, Nov 1, 01:00 | Not observed |
| Sunrise | 07:53 | 05:17 |
| Sunset | 18:52 | 18:00 |
| Daylight | 10 h 59 min | 12 h 43 min |
| People on this clock | 156,771 | 6,211,223 |
Compare Dayton, OH with another city
More comparisons with Dayton, OH: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Dayton, OH and Rio de Janeiro: common questions
How far ahead of Dayton, OH, is Rio de Janeiro?
Rio de Janeiro is 1 hour ahead of Dayton: UTC−3 against UTC−4.
What time is it in Rio de Janeiro at the start of the working day in Dayton, OH?
The working day in Dayton starts at 9:00 AM; in Rio de Janeiro it is 10:00 AM at that moment.
If it is 6:00 PM in Dayton, OH, what time is it in Rio de Janeiro?
At 6:00 PM in Dayton, clocks in Rio de Janeiro show 7:00 PM.
When is a good time to call Rio de Janeiro from Dayton, OH?
Between 9:00 AM and 5:00 PM in Dayton – 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).
From what time in Dayton, OH, is it tomorrow in Rio de Janeiro?
Once it is 11:00 PM in Dayton, the date in Rio de Janeiro has already changed. Until 1:00 AM in Rio de Janeiro, it is still the previous day in Dayton.
Is the time difference between Dayton, OH, and Rio de Janeiro the same all year?
No. Only Dayton switches to summer time, so the gap changes twice a year. From November 1, 2026, Rio de Janeiro will be 2 hours ahead of Dayton.
