Halloween has the oldest traditions in the world. The first time Halloween was celebrated was over 2,000 years ago. Halloween is about the relationship between the living and the dead. The observance was also evolved into ancient rituals marking the transition from summer to winter. Christian groups also attempted to demonize and denigrate the observance. There was a claim that Sam Hain was the Celtic God of the dead, and Halloween is his feast.

Charles Vallancey wrote about the Samhain festival with a poor understanding about the culture and the language. The Celts were tribal groups living in parts of western and central Europe. They also believed that the ties between the living and the dead were thinnest at this time, so the dead could return and walk. The people that had died the past year, but had not yet moved on, could interact with the living.