In the next few sessions of Pathfinder I'll do with my players, I wanna try to bring up some Christmas related story.
I don't want them to understand the theme before getting quite near to Christmas, so I'll have to build some story around it.

I think I'll try to do something around rumours about creatures being sighted transporting what they believe to be stolen goods. The first part would be to find them and to follow them. I hope it would let enough time for Christmas to come, and then I would introduce the real theme to get them a surprise and some nice adventure with the big red guy.