This Halloween history timeline began with the ancient Celts, who believed that the transition from autumn to winter heralded the arrival of spirits of the dead. According to their theory, the darkness and cold made it easier for aos s and deceased souls to cross over between worlds. On top of that, it was harvest season and the Celtic New Year, so the desire to celebrate while also warding off spirits gave birth to the Samhain festival. To frighten away ghosts, Samhain revelers wore masks and built large bonfires. People also went door to door, praying in exchange for small bread known as soul cakes.
