Madrid is 6 hours ahead of Ottawa
Best overlap: 8:00 AM to 12:00 PM in Ottawa is 2:00 PM to 6:00 PM in Madrid.
If you set up a recurring sync, 8:00 AM to 12:00 PM in Ottawa (2:00 PM to 6:00 PM in Madrid) is the natural home for it. Madrid is 6 hours ahead of Ottawa, leaving about 4 hours of daily overlap — enough for most meetings if you don't leave them too late in the day.