"Halloween traditions in the West date back thousands of years to the festival of Samhain, the Celtic New Year's festival. The name means "summer's end", and the festival marked the close of the harvest season and the coming of winter. The Celts believed that the veil between the worlds of the living and the dead was thinnest at this time and so the dead could return and walk where they had before." "Further, there was a very good chance that the spirit of a person one may have wronged would also make an appearance. In order to deceive the spirits, people darkened their faces with ashes from the bonfires (a practice later known as "guising"), and this developed into wearing masks. A living person would recognize the spirit of a loved one and could then reveal themselves but otherwise remain safe from the unwanted attention of darker forces." Mark, J. J. (2019, October 21). History of Halloween. World History Encyclopedia. Retrieved from https://www.worldhistory.org/article/1456/history-of-halloween/