While some historians believe this move was made so the holiday could coincide with, and thus "baptize," the holiday of Samhain, other historians believe that this may have been because the Germanic church was already celebrating All Saints Day on November 1, and the move had less to do with Samhain than previously thought.
An exorcist's perspective
Father Vincent Lampert is a Vatican-trained exorcist and a parish priest of the Archdiocese of Indianapolis who travels the country, speaking about his work as an exorcist and what people can do to protect themselves against the demonic.
He said when deciding what to do about Halloween, it's important for parents to remember the Christian origins of the holiday and to celebrate accordingly, rather than in a way that glorifies evil.
"Ultimately I don't think there's anything wrong with the kids putting on a costume, dressing up as a cowboy or Cinderella, and going through the neighborhood and asking for candy; that's all good clean fun," Fr. Lampert said.
Even a sheet with some holes cut in it as a ghost is fine, Fr. Lampert said.
The danger lies in costumes that deliberately glorify evil and instill fear in people, or when people pretend to have special powers or dabble in magic and witchcraft, even if they think it's just for entertainment.
"In the book of Deuteronomy, in chapter 18, it talks about not trying to consult the spirits of the dead, not consulting those who dabble in magic and witchcraft and the like," he said, "because it's a violation of a Church commandment that people are putting other things ahead of their relationship with God."
"And that would be the danger of Halloween that somehow God is lost in all of this, the religious connotation is lost and then people end up glorifying evil."
It's also important to remember that the devil and evil spirits do not actually have any additional authority on Halloween, Fr. Lampert said, and that it only seems that way.
"It's because of what people are doing, not because of what the devil is doing. Perhaps by the way they're celebrating that day, they're actually inviting more evil into our lives," he said.
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One of the best things parents can do is to use Halloween as a teachable moment, Fr. Lampert said.
"A lot of children are out celebrating Halloween, perhaps evil is being glorified, but we're not really sitting around and talking about why certain practices are not conducive with our Catholic faith and our Catholic identity. I think using it as a teachable moment would be a great thing to do."
Anne Auger, a Catholic mom of three from Helenville, Wisc., said that while she lets her kids dress up in costumes and go trick-or-treating, she's found that she has to screen the houses as they go, avoiding ones that are decorated with scarier things.
"Last year we had this experience this person came to the door dressed like this demonic wolf with glowing eyes and it was like, what on earth?" she said.
"Sometimes people dress up like witches and I can understand that, but this was a whole new level. It's just so different from when we were little."