So is this just a harmless commercial venture in our day with innocent intents, sugary treats, family gatherings, and a spirit of neighbourliness?
Some people would have you think so and would argue about the history behind the celebration and whether it has any bearing on today. I’ll leave the final analysis up to your discretion once you have a few more facts.

If you are at all concerned about what God says, then a simple scriptural response might be:
Jeremiah 10:2

Thus saith the Lord, Learn not the way of the nations, and be not dismayed at the signs of heaven; for they are dismayed at them.

However, since one scripture may be insufficient evidence to form a full opinion on a topic scroll to the end of the blog for more scriptural details: 

The following historical timeline about Halloween is courtesy of Brave AI”
Here was the prompt:
Give a historical outline of the celebrations that have significant ties to the modern day Halloween celebration

Quick Answer – Summary

**Halloween’s origins trace back to the ancient Celtic festival of Samhain, which marked the end of the harvest and the beginning of winter around October 31 and November 1.  The Celts lit sacred bonfires and wore costumes made of animal heads and skins to ward off spirits, while Druids performed divination and sacrifices. 

Roman influence blended with these Celtic traditions through two festivals: Feralia, which honored the dead, and the festival of Pomona, the goddess of fruit and trees.  This incorporation likely explains the modern tradition of bobbing for apples, as Pomona’s symbol was the apple. 

Christian observances significantly shaped the holiday’s name and structure.  In the 8th century, Pope Gregory III designated November 1 as All Saints’ Day (All Hallows’ Day), moving a previous feast to coincide with Samhain.  The evening before became known as All Hallows’ Eve, eventually shortened to Halloween.  All Souls’ Day on November 2 further merged with these customs, leading to practices like souling, where the poor visited homes offering prayers for the dead in exchange for food.

Immigration to America in the 19th century, particularly from Ireland and Scotland, popularized Halloween traditions in the United States.  Irish immigrants brought customs like guising (performing tricks for treats) and carved jack-o’-lanterns, initially made from turnips, which Americans adapted to pumpkins. 

Modern trick-or-treating evolved in the 1920s and 1930s from these European customs.  It became a widespread, community-centered activity by the 1950s, shifting Halloween from a holiday associated with mischief and vandalism to a family-friendly event focused on costumes and candy. 

Here is the more detailed version:

1. Ancient Celtic Samhain (c. 500 BCE – 400 CE)

Samhain (Irish for “Summer’s End”) was the most important of the four quarterly Celtic fire festivals, held midway between the autumn equinox and the winter solstice. It was a liminal or threshold festival — a time when the boundary between the human world and the Otherworld (Tír an Óg) was believed to thin, making contact with the Aos Sí (spirits or fae folk) more likely. 

Key rituals included:

• Sacred bonfires: Communal fires were lit on hilltops using a friction wheel (symbolizing the sun). All household hearth fires were extinguished and relit from the sacred bonfire, renewing communal bonds. Livestock were driven between two fires for purification.
• Sacrifices and offerings: Cattle were slaughtered and their bones thrown into the fires (“bone fires”). Food and drink were left at doorways to appease ancestral spirits and the Aos Sí.
• Divination: Samhain was the most celebrated night of the year for fortune-telling. Apples (associated with the Otherworld and immortality) and hazelnuts (associated with divine wisdom) were central. Games included apple bobbing, hazelnut roasting (naming two nuts for a potential couple and watching whether they burned together or flew apart), mirror gazing by candlelight, and laying stones in a ring around the fire — if a stone was found mislaid in the morning, that person was said not to live out the year.
• Costumes and guising: People wore costumes made of animal heads and skins to disguise themselves from roaming spirits. Mumming and guising (going door-to-door in costume, reciting verses in exchange for food) were part of the festival from at least the early modern era. 

2. Roman Influence (43 CE – 5th century CE)

By A.D. 43, the Roman Empire had conquered most Celtic territory. Over the 400 years of Roman rule, two Roman festivals merged with Samhain:

• Feralia — a late-October/late-February day commemorating the passing of the dead, during which Romans offered sacrifices to appease restless souls.
• The festival of Pomona — honoring the Roman goddess of fruit, gardens, and orchards.  Pomona’s symbol was the apple, and her association with divination and harvest abundance likely explains why apple-based games (especially bobbing for apples) became embedded in the combined celebration. 

3. Christian Supplantation (7th – 13th century)

As Christianity spread into Celtic lands, the Church deliberately overlaid its own observances on the existing pagan calendar:

• 609 CE: Pope Boniface IV dedicated the Pantheon in Rome to all Christian martyrs, establishing a feast of “All Martyrs’ Day” on May 13.
• c. 731–741 CE: Pope Gregory III expanded the feast to include all saints (not just martyrs) and moved it to November 1, deliberately coinciding with Samhain to Christianize the pagan holiday.
• c. 835 CE: Emperor Louis the Pious, with the support of Pope Gregory IV, extended the November 1 feast throughout the Frankish Empire.
• c. 1000 CE: The Benedictine Abbey of Cluny (under Abbot Odilo of Cluny) established All Souls’ Day on November 2, a day of prayer for the faithful departed in Purgatory.  Church bells were rung for souls, and criers dressed in black walked the streets calling on people to remember the dead. 

Together, these three days — All Hallows’ Eve (Oct 31), All Saints’ Day (Nov 1), and All Souls’ Day (Nov 2) — formed Allhallowtide, a Christian triduum of remembrance.  The evening before All Saints’ Day became known as All Hallows’ Eve, from which “Halloween” derives. 

Souling — the practice that most directly evolved into trick-or-treating — emerged from All Souls’ Day observances.  Beginning at least by the 15th century in England, Wales, Flanders, and parts of Germany and Austria, groups of poor people (often children) went door-to-door on All Souls’ Day, offering prayers for the dead in exchange for “soul cakes” — small spiced cakes, often marked with a cross. 

4. Scottish and Irish Folk Traditions (18th – 19th century)

In the Gaelic-speaking regions, Samhain customs persisted alongside (and often beneath) the Christian overlay. Key developments:

• Guising became a widespread autumn practice: young people went door-to-door in costume performing songs, riddles, or jokes in exchange for food or coins.
• The Jack-o’-lantern legend took shape in Irish folklore.  The tale of Stingy Jack — a trickster who cheated the Devil, was denied both heaven and hell, and was condemned to roam the earth with only a glowing ember in a carved turnip — gave the tradition its name.  In Ireland and Scotland, people carved grotesque faces into turnips, mangelwurzel (large beets), and swedes to frighten Jack’s wandering soul and other spirits.
• The word “jack-o’-lantern” first appeared in print in 1663 (referring to a night watchman carrying a lantern) and as a carved lantern by 1837.
• Scottish poet Robert Burns recorded many of these legends in his 1785 poem “Hallowe’en”, helping preserve them in the literary record.

5. Immigration to America (mid-19th century)

As many as 4.5 million Irish immigrants came to the United States between 1820 and 1930, many fleeing the Great Famine.  They brought with them the full toolkit of Halloween customs:

• Jack-o’-lanterns: In America, immigrants found pumpkins — native to the continent, much larger and softer than turnips, with a hollow seed cavity that made them far easier to carve.  The American pumpkin-carving tradition is recorded by 1837, and the first definitive reference to a pumpkin jack-o’-lantern carved for Halloween appeared in a 1886 Canadian newspaper.
• Guising and apple-bobbing spread through Irish and Scottish communities in the Northeast and Midwest.
• These customs blended with existing American autumn traditions (harvest parties, parades, and games) to create a distinctly American Halloween. 

6. The 20th Century: From Mischief to Mainstream

• 1920s: “Trick or treat” first appeared in print in 1927, in the Lethbridge Herald (Alberta, Canada).  In the U.S., Irish and Scottish communities had revived souling and guising, but the decade’s dominant Halloween activity was pranking — pranks escalated from mild mischief to vandalism.
• 1930s: The Great Depression worsened the problem. On October 31, 1933 — dubbed “Black Halloween” — violence erupted in Depression-weary towns: overturned cars, smashed windows, sawed-down utility poles, and opened fire hydrants.  In response, mayors and community leaders in cities like Syracuse, New York, and Denver, Colorado organized official Halloween events, transforming the holiday from a night of individual mischief into a community-centered celebration. This is widely credited as the birth of organized trick-or-treating.
• 1940s: World War II’s sugar rationing stalled the custom almost as soon as it had started — there were few treats to hand out.
• 1950s: The postwar baby boom, suburban expansion, and a booming middle class created the ideal environment for trick-or-treating to flourish.  Suburbs, with their close-together houses and nuclear families, were essentially “trick-or-treating infrastructure.” Candy companies (like Wrigley and Mars) launched national advertising campaigns specifically aimed at Halloween, replacing earlier homemade treats (fruit, coins, nuts) with commercially produced candy bars.
• 1966: The animated special It’s the Great Pumpkin, Charlie Brown aired, cementing trick-or-treating’s imagery in American popular culture. 

By the late 20th century, Halloween had become the largest secular holiday in the United States, generating billions of dollars in revenue and celebrated with costumes, parties, haunted houses, and community events — a far cry from the sacred bonfires of ancient Samhain, yet directly descended from them.

So we can evaluate this cultural practice based on the facts cited above about the celebration and in the context of the scriptures that might apply. Then with God’s wisdom to discern his mind on the matter we can use our reason to determine whether it is a custom or cultural celebration that we should adopt as sola scriptura Christians.

 
Deuteronomy 18:9 explicitly warns against learning to imitate the detestable ways of the nations.  
Deuteronomy 12:30-31 forbids inquiring about how other nations worship their gods or following their detestable customs.  
Leviticus 18:3 prohibits following the practices of the land of Canaan or Egypt. 
Proverbs 4:14-15 urges not to follow the path of evildoers or think about it.   
Jeremiah 10:2 instructs people to learn not the way of the heathen or be dismayed by their signs. 

Romans 12:2 commands believers to not conform to the pattern of this world, but to be transformed by the renewing of their minds. 
1 Corinthians 10:20 warns against participating with demons in sacrifices offered to idols.  
2 Corinthians 6:17 calls believers to come out from among them and be separate, touching no unclean thing.  
Colossians 2:8 cautions against being taken captive by philosophy dependent on human tradition rather than Christ. 
Ephesians 4:17-19 advises against walking as the rest of the Gentiles, who walk in futility.  
Titus 2:11-12 teaches believers to say “No” to ungodliness and worldly passions.
1 John 2:15-16 warns against loving the world or its cravings, which are not from the Father.