Atenas to Rio de Janeiro: time difference
Rio de Janeiro is 3 h ahead of Atenas. Live clocks for both, the working hours they share, and how each one sits against your own time.
+3 h
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Atenas 23:25 11:25 PM Rio de Janeiro 02:25 2:25 AM You –:–
23:25 11:25 PM
Central Standard Time · UTC-6
☀️ 05:27 · 🌙 17:19
02:25 2:25 AM
Brasilia Standard Time · UTC-3
☀️ 05:17 · 🌙 18:00
·
+3 h
Rio de Janeiro is 3 h ahead of Atenas.
When you, Atenas 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
🇨🇷 Atenas
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
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 1 1 AM 2 2 AM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
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Time zones side by side
| Detail | 🇨🇷 Atenas | 🇧🇷 Rio de Janeiro |
|---|---|---|
| Local time | 23:25 | 02:25 |
| Local date | Monday, October 19, 2026 | Tuesday, October 20, 2026 |
| Time zone | Central Standard Time | Brasilia Standard Time |
| UTC offset | UTC-6 | UTC-3 |
| Offset from Atenas | — | +3 h |
| IANA zone | America/Costa Rica | America/Sao Paulo |
| Daylight saving | Not observed | Not observed |
| Sunrise | 05:27 | 05:17 |
| Sunset | 17:19 | 18:00 |
| Daylight | 11 h 53 min | 12 h 43 min |
| People on this clock | 7,000 | 6,211,223 |
Compare Atenas with another city
More comparisons with Atenas: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Atenas and Rio de Janeiro: common questions
What is the time difference between Atenas and Rio de Janeiro?
Rio de Janeiro is 3 hours ahead: it uses UTC−3, while Atenas is on UTC−6.
What time is it in Rio de Janeiro at the start of the working day in Atenas?
The working day in Atenas starts at 9:00 AM; in Rio de Janeiro it is 12:00 PM at that moment.
If it is 6:00 PM in Atenas, what time is it in Rio de Janeiro?
At 6:00 PM in Atenas, clocks in Rio de Janeiro show 9:00 PM.
When is a good time to call Rio de Janeiro from Atenas?
Between 9:00 AM and 3:00 PM in Atenas – that is 12:00 PM 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 9:00 PM in Atenas it is already the next day in Rio de Janeiro. The other way round, until 3:00 AM in Rio de Janeiro it is still the previous day in Atenas.
Is the time difference between Atenas and Rio de Janeiro the same all year?
Yes. Neither Atenas nor Rio de Janeiro switches to summer time, so the gap is always 3 hours.
