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Happy Halloween!
October 31
Halloween is a holiday celebrated each year on October 31, and Fairfax County’s Halloween 2024 trick-or-treating will occur on Thursday, October 31. The tradition originated with the ancient Celtic festival of Samhain, when people would light bonfires and wear costumes to ward off ghosts. In the eighth century, Pope Gregory III designated November 1 as a time to honor all saints. Soon, All Saints Day incorporated some of the traditions of Samhain. The evening before was known as All Hallows Eve, and later Halloween. Over time, Halloween evolved into a day of activities like trick-or-treating, carving jack-o-lanterns, festive gatherings, donning costumes and eating treats.
https://www.history.com/topics/halloween/history-of-halloween