Halloween Hooha! Culture and costume.
Every culture honors those who have gone before in some way.
Halloween--October 31 started out as a Celtic tradition called 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.