Uh, where do you think Halloween came from? It sure doesn't have anything to do with Christianity.
That's pretty funny, considering that Halloween is short for All Hallows' Eve, the day before All Saints' Day. No link to Christianity? If it weren't for Christianity, there would be no Halloween at all.
Google it.
The ghosts and goblins? Have you ever looked at the gargoyles on a European cathedral? They're everywhere...designed to show folks what's waiting for them if they don't become Christians.
Oh, yes, Halloween has much to do with Christianity.