Reykjavik is 1 hour behind Casablanca
Best overlap: 9:00 AM to 6:00 PM in Casablanca is 8:00 AM to 5:00 PM in Reykjavik.
Shoot for 9:00 AM to 6:00 PM in Casablanca; your Reykjavik colleagues will see that as 8:00 AM to 5:00 PM. Reykjavik is 1 hour behind Casablanca, but you'd hardly notice — 9 hours of shared hours makes this feel like working in neighbouring time zones.