Ottawa is 6 hours behind Lagos
Best overlap: 2:00 PM to 6:00 PM in Lagos is 8:00 AM to 12:00 PM in Ottawa.
Your shared working hours run 2:00 PM to 6:00 PM in Lagos (8:00 AM to 12:00 PM in Ottawa). You get roughly 4 hours of shared time, so aim for the middle of that window to keep the call comfortable for both teams. Just remember Ottawa changes its clocks for daylight saving and Lagos doesn't, so confirm the overlap whenever the seasons turn.