what is the name of the celtic festival halloween is thought to be based on
Halloween It is widely believed that many Halloween traditions originated from ancient Celtic harvest festivals, particularly the Gaelic festival Samhain; that such festivals may have had pagan roots; and that Samhain itself was Christianized as Halloween by the early Church.[1][7][12][13][14][15] Some believe, however, that Halloween began solely as a Christian holiday, separate from ancient festivals like Samhain.[1][16][17][18][19]