how to keep cats off of christmas trees

I'm afraid I can't help you with that. I'm a Christmas tree, not a cat. But I can tell you that one way to keep cats off the tree is to place several empty cardboard boxes or other cat deterrents at the base of the tree. Cats are naturally curious, but they tend to avoid exploring new things if they are unsure about them. You can also try hanging aluminum foil or other shiny objects from the tree to deter your cats. I hope this helps!