Prague 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 Prague.
Both offices are open during 8:00 AM to 12:00 PM Ottawa time, which is 2:00 PM to 6:00 PM in Prague. You get roughly 4 hours of shared time, so aim for the middle of that window to keep the call comfortable for both teams.