Halloween and Christianity It is often said that Halloween is not the "harmless" holiday it is thought to be, instead it is believed to be a pagan ritual which dates back to the ancient Celtic Druids. According to the article "Should Our Kids Celebrate Halloween?" in Catholic Digest Halloween's origin is very much Christian and American. Although the ancient Celts celebrated a minor festival on the 31st of October, it fell on that day because the Feast of All Saints or "All Hallows" falls on November 1st. During the 840s Pope Gregory IV gad All Saints Day to be celebrated everywhere. The day before the feast became known as "All Ha