Normally I consider the Christmas movie as only half-canon. But for this post I will make an exception.
So in The Enchanted Christmas we are told that the curse had happened during Christmas. That means that Adam and all the serverants has gained one very traumatic event associated with Christmas.
Then during the movie plot, that's also happend during Christmas, they fight Forte. He almost destroys the entire castle and kills everybody... But they kill him instead. During Christmas.
I won't even dwell on what possibly happend to his body. This whole thing was crazy. And then they celebrate Christmas as if nothing has happend.
Idk about you but if it would be my reality i wouldn't look the same anymore. I mean they had like TWO VERY HEAVY traumas during Christmas time. YES THIS IS THE POINT WHEN IM REALISING HOW DARK BATB ACTUALLY CAN BE WHEN WE THINK ABOUT IT