São Paulo is 6 hours behind Cairo
Best overlap: 2:00 PM to 6:00 PM in Cairo is 8:00 AM to 12:00 PM in São Paulo.
Keep meetings inside 2:00 PM to 6:00 PM in Cairo — that maps to 8:00 AM to 12:00 PM in São Paulo. With 4 hours of overlap, 2:00 PM in Cairo (8:00 AM in São Paulo) is a comfortable, repeatable slot for both sides. Because Cairo and São Paulo don't both observe daylight saving, plan to re-check the overlap around March and November.