Rio das Ostras to Casablanca: time difference
Casablanca is 4 h ahead of Rio das Ostras. 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 das Ostras 23:51 11:51 PM Casablanca 03:51 3:51 AM You –:–
23:51 11:51 PM
Brasilia Standard Time · UTC-3
☀️ 05:13 · 🌙 17:54
03:51 3:51 AM
GMT+01:00 · UTC+1
☀️ 07:39 · 🌙 18:54
·
+4 h
Casablanca is 4 h ahead of Rio das Ostras.
When you, Rio das Ostras and Casablanca 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 das Ostras
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
🇲🇦 Casablanca
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 3 3 AM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇧🇷 Rio das Ostras | 🇲🇦 Casablanca |
|---|---|---|
| Local time | 23:51 | 03:51 |
| Local date | Sunday, October 18, 2026 | Monday, October 19, 2026 |
| Time zone | Brasilia Standard Time | GMT+01:00 |
| UTC offset | UTC-3 | UTC+1 |
| Offset from Rio das Ostras | — | +4 h |
| IANA zone | America/Sao Paulo | Africa/Casablanca |
| Daylight saving | Not observed | Not observed |
| Sunrise | 05:13 | 07:39 |
| Sunset | 17:54 | 18:54 |
| Daylight | 12 h 41 min | 11 h 15 min |
| People on this clock | 156,491 | 3,215,935 |
Compare Rio das Ostras with another city
More comparisons with Rio das Ostras: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Rio das Ostras and Casablanca: common questions
What is the time difference between Rio das Ostras and Casablanca?
Casablanca is 3 hours ahead: it uses UTC+0, while Rio das Ostras is on UTC−3.
What time is it in Casablanca at the start of the working day in Rio das Ostras?
The working day in Rio das Ostras starts at 9:00 AM; in Casablanca it is 12:00 PM at that moment.
If it is 6:00 PM in Rio das Ostras, what time is it in Casablanca?
At 6:00 PM in Rio das Ostras, clocks in Casablanca show 9:00 PM.
Is there a time when both Rio das Ostras and Casablanca are at work?
Yes: from 9:00 AM to 3:00 PM in Rio das Ostras (12:00 PM to 6:00 PM in Casablanca), the working days (9:00 AM–6:00 PM) overlap.
When does the date change in Casablanca compared with Rio das Ostras?
The new day starts in Casablanca earlier: at 9:00 PM in Rio das Ostras it is already midnight there. Until 3:00 AM in Casablanca, Rio das Ostras is still on the previous day.
Is the time difference between Rio das Ostras and Casablanca the same all year?
Yes. Neither Rio das Ostras nor Casablanca switches to summer time, so the gap is always 3 hours.
