Well, you might celebrate it but do you know the history of Halloween?!
Evolving from the ancient Celtic holiday of Samhain, modern Halloween has become less about literal ghosts and ghouls and more about costumes and candy definitely.
The Celts used the day to mark the end of the harvest season and the beginning of winter, and also believed that this transition between the seasons was a bridge to the world of the dead.
Summary: Halloween from a pagan ritual to a party night.