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Global ClockTime zone converter & meeting planner
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AUTO follows the operating system. Working hours drive the green banding on every grid. All four persist on this device only.

Time in Rio de Janeiro vs Casablanca

Rio de Janeiro keeps UTC−3 (UTC−3) and Casablanca keeps UTC+1 (UTC+1) today. Casablanca is 4 hours ahead of Rio de Janeiro; the rows below read both clocks live.

The working day, side by side

Hours shaded in both rows are inside working hours in both cities: 13:00–18:00 in Casablanca (09:00–14:00 your time).

Rio de Janeiro and Casablanca hour by hour, with the working-hour overlap shaded
City00:00 in Rio de Janeiro01:00 in Rio de Janeiro02:00 in Rio de Janeiro03:00 in Rio de Janeiro04:00 in Rio de Janeiro05:00 in Rio de Janeiro06:00 in Rio de Janeiro07:00 in Rio de Janeiro08:00 in Rio de Janeiro09:00 in Rio de Janeiro10:00 in Rio de Janeiro11:00 in Rio de Janeiro12:00 in Rio de Janeiro13:00 in Rio de Janeiro14:00 in Rio de Janeiro15:00 in Rio de Janeiro16:00 in Rio de Janeiro17:00 in Rio de Janeiro18:00 in Rio de Janeiro19:00 in Rio de Janeiro20:00 in Rio de Janeiro21:00 in Rio de Janeiro22:00 in Rio de Janeiro23:00 in Rio de Janeiro
Rio de Janeiro——000102030405060708091011121314151617181920212223
Casablanca——000102030405060708091011121314151617181920212223
  • Working hours
  • Shoulder
  • Night
  • Overlap

Do more with Rio de Janeiro and Casablanca

Open in the PlannerAdd more cities, find a meeting time that works for everyone, then share it as a link.Open in Watch ViewKeep Rio de Janeiro, Casablanca and other cities on screen as live clocks, under an animated sky and sun.

Best hours to call

09:00 in Rio de Janeiro
Inside working hours on both sides
13:00 in Casablanca
10:00 in Rio de Janeiro
Inside working hours on both sides
14:00 in Casablanca
11:00 in Rio de Janeiro
Inside working hours on both sides
15:00 in Casablanca
12:00 in Rio de Janeiro
Inside working hours on both sides
16:00 in Casablanca

Where daylight saving pulls them apart

Casablanca next changes on Sunday 20 September 2026. Between those two dates the gap between the cities is an hour different from the one shown above — which is exactly when a recurring meeting drifts. Every date we track is on the daylight saving page.

Also useful

Common questions

How many hours ahead is Casablanca of Rio de Janeiro?

Casablanca is 4 hours ahead of Rio de Janeiro right now. The gap is not fixed: it moves whenever either side changes its clocks.

What is the best time to call between Rio de Janeiro and Casablanca?

Any hour in 09:00–14:00 Rio de Janeiro time is inside working hours in both cities.

Do Rio de Janeiro and Casablanca change clocks on the same date?

Only one of them does, so the gap between them changes twice a year even though neither city moved relative to the sun.