What "All Hallows' Eve" means
A "hallow" is a holy one: a saint. The word comes from the Old English halga, "holy person, saint," the same root as "hallowed" in the Our Father: "Our Father who art in heaven, hallowed be thy name" (Matthew 6:9). "All Hallows" is the old English name for All Saints. "Even" (later "e'en" and "eve") is the evening before.
So "All-Hallow-Even" is the night before All Saints. The Scots shortened it to Hallowe'en, and Robert Burns's 1785 poem "Halloween" made the word famous. New Advent, which publishes the 1907 Catholic Encyclopedia online, says it plainly in its editors' note above the All Saints article: "The vigil of this feast is popularly called 'Hallowe'en' or 'Halloween'."
Why Halloween is on October 31
Halloween is on October 31 because All Saints is on November 1. The real question is how All Saints got to November 1, and the honest answer has a few steps.
Early on, the Church honored the martyrs together. In the East a common feast of all the martyrs was kept in the spring or near Pentecost. In Rome, in the early seventh century, Pope Boniface IV dedicated the Pantheon to the Blessed Virgin and all the martyrs, and that anniversary was kept on May 13, not November 1.
Gregory III built a chapel to all the saints. Pope Gregory III (731–741) built an oratory in Old St. Peter's Basilica dedicated to all the saints and filled it with relics, according to the Liber Pontificalis, the early book of papal lives. Rome's November 1 observance is traditionally traced to that oratory. The sources don't agree on the day it was dedicated, so we don't give one.
In 835 the emperor fixed the date for Gaul and Germany. The chronicle of Sigebert of Gembloux (12th century) records under the year 835 that, at the suggestion of Pope Gregory and with the agreement of all the bishops, the emperor Louis ordered the feast of All Saints kept on the Kalends (the first day) of November in Gallia et Germania, "in Gaul and Germany." That is Louis the Pious, Charlemagne's son, acting at the urging of Pope Gregory IV. It was an imperial order for the Frankish lands, not a papal decree for the whole Church. Ado of Vienne, whose martyrology was compiled in the 850s, records the same request from the Pope to the emperor.
The vigil came with the feast. All Saints had a vigil (a day of preparation before the feast) from early on. The liturgical vigil and the octave were dropped in 1955, but the name stuck to the night. And the night still belongs to the feast: Mass on the evening before a holy day counts for the holy day (Code of Canon Law, canon 1248 §1).
Did Halloween come from Samhain?
Not the name. The date comes from All Saints on November 1, and why All Saints landed on November 1 is still argued. Here's what the evidence supports.
Samhain was the festival that opened the winter in early medieval Ireland. The popular story says it was the pagan Celtic New Year and a "festival of the dead," and that the Church simply put a Christian name on it. The historian Ronald Hutton examined that story in the journal Folklore. He found the evidence for a Celtic New Year at Samhain "indirect, speculative, and inconclusive," and the evidence for a feast of the dead "pretty near non-existent." He also wrote that neither idea "has been conclusively disproved."
No document from Gregory III or Gregory IV says All Saints was moved to November 1 to replace a pagan feast. Some modern writers argue it was; others point to Gregory III's oratory. Nobody can prove the motive.
So here's the honest line. The name is Christian. The date is set by a Christian feast. Some folk customs grew up around the night over the centuries, the way customs grow around Christmas and Easter. Burns's poem, for one, describes the Scots' fortune-telling games on Halloween. Where every one of those customs came from is a fair argument for historians. It doesn't make the night pagan.
Is Halloween evil?
No. A date on the calendar isn't evil. What people do with it can be.
The Church doesn't legislate costumes or candy. The Catechism does name what's off-limits on any night of the year:
- "All forms of divination are to be rejected: recourse to Satan or demons, conjuring up the dead or other practices falsely supposed to 'unveil' the future." It lists "horoscopes, astrology, palm reading, interpretation of omens and lots, the phenomena of clairvoyance, and recourse to mediums" (CCC 2116).
- "All practices of magic or sorcery… are gravely contrary to the virtue of religion," and "Spiritism often implies divination or magical practices; the Church for her part warns the faithful against it" (CCC 2117).
That's the line. Séances, Ouija boards, tarot cards and fortune-telling games fall on the wrong side of it, because they're divination and spiritism by another name. A kid in a cowboy hat asking for a Snickers doesn't.
If the night makes you uneasy, don't stew on it. Pray. The St. Michael Prayer and our spiritual warfare prayers are short enough to say at the door.
How a Catholic family keeps Halloween
You don't have to hide from October 31, and you don't have to hand it over either. A father can make it what its name says it is: the eve of the saints.
- Get your family to Mass for All Saints. In 2026, November 1 is a Sunday. A Mass on the evening of Saturday, October 31, counts (canon 1248 §1), which means Halloween night can start at church.
- Dress the kids as saints, or at least give them the option. Let a son pick a soldier-saint from the Catholic warrior saints, or use it to start the talk about choosing a Confirmation saint. A superhero is fine too. Skip anything that mocks the faith or makes evil look good.
- Keep the occult out of the house. No séances, Ouija boards, tarot or "fortune-telling" games, at home or at the party down the street (CCC 2116–2117).
- Be the open door on your street. Turn the porch light on and be generous. A Catholic house should be the easiest one on the block to knock on.
- Tell your kids what the night means. "Hallow" means saint. Halloween is the night before we celebrate everyone in heaven. Say it once at dinner and they'll remember it.
- End the night in prayer. Say the St. Michael Prayer over the house before bed.
If you want a daily rhythm for leading your family like that all year, our free 30-day program, The Priest of Your Home, gives you one three-minute letter each morning, one order for that night, and one prayer.
Keep going (free):
- The Priest of Your Home: a free 30-day program for Catholic husbands and fathers. One three-minute letter each morning, one order for tonight, one prayer.
- Why Do Catholics Pray to Saints?: the communion of saints, from Scripture.
- Praying to the Saints & Relics: the Catholic answer, objection by objection.
- The Catholic Warrior Saints
- Prayer for the Dead
- What Is a Plenary Indulgence?
- All 267 Popes in Order: including Gregory III and Gregory IV.