My first flight of the year AC156 YYC-YYZ was cancelled last night. They announced it in the lounger as our inbound was landing? No other notifications, app still showed it on time and was still showing it on time when I got to the concierge office. Unfortunately, due to holiday travel, no other options than to get to my destination 11 hours late. At least I will still make the funeral I am headed to. When they announced the cancellation they also announced we were all on a replacement flight this morning. It is being operated with the same fin, just about 12 hours later. They claim mechanical, but 8 hav3 long since stopped believing them. I saw one yesterday that had almost a 12 hour delay due to a previous flight issue. When I tracked i5 back, The original delay was due to late check-ins. I’ve never had a flight held more than a few minutes for me!