Ottawa is 6 hours behind Zurich
Best overlap: 2:00 PM to 6:00 PM in Zurich is 8:00 AM to 12:00 PM in Ottawa.
Aim for 2:00 PM to 6:00 PM Zurich time — that's 8:00 AM to 12:00 PM over in Ottawa. Ottawa is 6 hours behind Zurich, leaving about 4 hours of daily overlap — enough for most meetings if you don't leave them too late in the day.