The Grim Reaper. Part of our Halloween display - still a work in progress

Halloween (a shortening of All Hallows’ Evening), also known as Hallowe'en or All Hallows' Eve, is a yearly holiday observed around the world on October 31, the night before All Saints' Day. Much like Day of the Dead celebrations, the Christian feast of All Hallows' Eve, according to some scholars, incorporates traditions from pagan harvest festivals and festivals honouring the dead, particularly the Celtic Samhain; other scholars maintain that the feast originated entirely independently of Samhain. Typical festive Halloween activities include trick-or-treating (also known as "guising"), attending costume parties, carving jack-o'-lanterns, lighting bonfires, apple bobbing, visiting haunted attractions, playing pranks, telling scary stories, watching horror films, as well as the religious observances of praying, fasting and attending vigils or church services.

In traditional belief and fiction, a ghost is the soul or spirit of a deceased person or animal that can appear, in visible form or other manifestation, to the living. Descriptions of the apparition of ghosts vary widely from an invisible presence to translucent or barely visible wispy shapes, to realistic, life-like visions. The deliberate attempt to contact the spirit of a deceased person is known as necromancy, or in spiritism as a séance.

The belief in manifestations of the spirits of the dead is widespread, dating back to animism or ancestor worship in pre-literate cultures. Certain religious practices—funeral rites, exorcisms, and some practices of spiritualism and ritual magic—are specifically designed to appease the spirits of the dead. Ghosts are generally described as solitary essences that haunt particular locations, objects, or people they were associated with in life, though stories of phantom armies, ghost trains, phantom ships, and even ghost animals have also been recounted.