Ottawa is 5 hours behind Reykjavik
Best overlap: 1:00 PM to 6:00 PM in Reykjavik is 8:00 AM to 1:00 PM in Ottawa.
The sweet spot is 1:00 PM to 6:00 PM Reykjavik time, matching 8:00 AM to 1:00 PM in Ottawa. Ottawa is 5 hours behind Reykjavik. That leaves about 5 hours of common time — enough for a meeting or two, so use it deliberately. Watch the DST gap — when Ottawa changes its clocks and Reykjavik stays the same, this window slides by an hour.