Montreal is 6 hours behind Stockholm
Best overlap: 2:00 PM to 6:00 PM in Stockholm is 8:00 AM to 12:00 PM in Montreal.
The overlap falls at 2:00 PM to 6:00 PM in Stockholm, or 8:00 AM to 12:00 PM if you're in Montreal. You get roughly 4 hours of shared time, so aim for the middle of that window to keep the call comfortable for both teams.