Brussels 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 Brussels.
Schedule calls for 8:00 AM to 12:00 PM in Ottawa — your colleagues in Brussels will be online from 2:00 PM to 6:00 PM. Brussels 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.