Flying Spaghetti Monster
Fear not, all you Pastafarians. The FSM will bless you with his noodly goodness if you hang his likeness on your tree. Even though you don't recognize Christmas, Hannukah or Kwanzaa, you do celebrate "Holiday". And since "Holiday" has no real specific date...why not now? And why not have a tree in your home? FSM created trees after a night of drinking. Seems only appropriate.