Many people celebrate Halloween or similar celebrations just for fun, not because they believe in supernatural beings. Others may consider it just to develop their children's imagination.
Halloween also known as Allhalloween, All Halows' Eve or All Saints' Eve. Usually celebrated on 31 October. When celebrations usually use various kinds of knickknacks, like a sinister face made of pumpkin or often called Jack O'Lantern, then use costumes like ghosts, witches, zombies, vampires and the others.
And where Halloween comes from?
Timeline of Halloween
1. 5th Century BC
People commemorating the Celtic festival of Samhain each end of October. They believe that this is the time when the spirits and supernatural beings are very actively roaming.