Casablanca to Rio das Ostras: time difference
Rio das Ostras is 4 h behind Casablanca. Live clocks for both, the working hours they share, and how each one sits against your own time.
−4 h
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Casablanca 08:51 8:51 AM Rio das Ostras 04:51 4:51 AM You –:–
08:51 8:51 AM
GMT+01:00 · UTC+1
☀️ 07:39 · 🌙 18:54
04:51 4:51 AM
Brasilia Standard Time · UTC-3
☀️ 05:13 · 🌙 17:54
·
−4 h
Rio das Ostras is 4 h behind Casablanca.
When you, Casablanca and Rio das Ostras are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇲🇦 Casablanca
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 das Ostras
20 8 PM 21 9 PM 22 10 PM 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
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇲🇦 Casablanca | 🇧🇷 Rio das Ostras |
|---|---|---|
| Local time | 08:51 | 04:51 |
| Local date | Monday, October 19, 2026 | Monday, October 19, 2026 |
| Time zone | GMT+01:00 | Brasilia Standard Time |
| UTC offset | UTC+1 | UTC-3 |
| Offset from Casablanca | — | −4 h |
| IANA zone | Africa/Casablanca | America/Sao Paulo |
| Daylight saving | Not observed | Not observed |
| Sunrise | 07:39 | 05:13 |
| Sunset | 18:54 | 17:54 |
| Daylight | 11 h 15 min | 12 h 41 min |
| People on this clock | 3,215,935 | 156,491 |
Compare Casablanca with another city
More comparisons with Casablanca: the time zones next to it and the far side of the clock.
Big time differences
Casablanca and Rio das Ostras: common questions
How many hours behind Casablanca is Rio das Ostras?
The clocks in Rio das Ostras are 3 hours behind those in Casablanca (UTC−3 and UTC+0).
What time is it in Rio das Ostras at the start of the working day in Casablanca?
The working day in Casablanca starts at 9:00 AM; in Rio das Ostras it is 6:00 AM at that moment.
If it is 6:00 PM in Casablanca, what time is it in Rio das Ostras?
At 6:00 PM in Casablanca, clocks in Rio das Ostras show 3:00 PM.
When is a good time to call Rio das Ostras from Casablanca?
Between 12:00 PM and 6:00 PM in Casablanca – that is 9:00 AM to 3:00 PM in Rio das Ostras – both places are within working hours (9:00 AM–6:00 PM).
When is it still the previous day in Rio das Ostras?
Until 3:00 AM in Casablanca it is still the previous day in Rio das Ostras. The other way round, from 9:00 PM in Rio das Ostras it is already the next day in Casablanca.
Does the time gap between Casablanca and Rio das Ostras change during the year?
No, the clocks change neither in Casablanca nor in Rio das Ostras, so the gap is 3 hours all year round.
