Cairo is 7 hours ahead of Ottawa
Best overlap: 8:00 AM to 11:00 AM in Ottawa is 3:00 PM to 6:00 PM in Cairo.
Your shared working hours run 8:00 AM to 11:00 AM in Ottawa (3:00 PM to 6:00 PM in Cairo). Cairo is 7 hours ahead of Ottawa. That leaves about 3 hours of common time — enough for a meeting or two, so use it deliberately.