Seriously though, if you understand history, and you understand the mindset of the pagans that came before Christianity, Halloween makes all sorts of sense. It is a primitive view of how the world works, and how to help protect yourselves from the supposed evil spirits that roamed among the living during that one night a year. Historically, the Christian anti-hero Satan (or Lucifer) was an angel. Angels, according to the bible, have no gender. Lucifer fell from grace. Yet, Satan is referred to as a male.
How he went from looking like the angels, Michael, Gabriel, etc, to a goat footed demon, is easy. Pan was a pagan god of the woods. So was Cernunnos. Pan was a satyr, Cernunnos had horns like a deer and was very aggressive. Both were adept at ‘exciting’ human beings. The early Christians merely borrowed the imagery, borrowed the holy days of the pagans, and based their own religion upon it. The way to win a war is to make your enemies less than human.
April Fool’s Day is what the Christians renamed the original pagan New Years’ Day.