Halloween was traditionally a festival to mark the end of the Celtic harvest season, which was a time when people would gather their crops and prepare for the winter months. It was also believed to be a time when the veil between the world of the living and the world of the dead was at its thinnest, allowing spirits and other supernatural beings to cross over into our world. As a result, Halloween has long been associated with ghosts, witches, and other spooky creatures, and many of the traditions and symbols associated with the holiday are meant to ward off evil spirits and protect against misfortune. Today, Halloween is widely celebrated around the world, with many people dressing up in costume, decorating their homes with festive decorations, and enjoying food, parties, and other fun activities.