It is a common internet truism that Halloween is simply a rebranded pagan festival. The historical record, however, reveals a much more complex picture. My reading of the evidence is that modern October 31 is not a direct preservation of ancient Samhain. Rather, it is a deeply layered tradition.

To me, the interesting part is not that Halloween has a single ancient origin. It is that several distinct traditions accumulated around the same seasonal transition and kept adapting as they moved between communities. The seasonal rhythms of the agricultural year helped shape the timing, while religious observances, regional customs and later commercial influences reshaped the holiday over time.

Before industrialization standardized global time, agrarian societies operated strictly on agricultural cycles. For the ancient Celtic populations of Ireland and Scotland, the year hinged on two primary pastoral pivots. Beltaine in the spring marked the movement of cattle to summer pastures. Samhain marked the seasonal transition into winter, traditionally placed around the beginning of November in later descriptions.

This was a time of immense physical vulnerability. The harvest had to be secured, excess livestock was slaughtered for winter provisions, and the days grew noticeably shorter. The surviving evidence suggests this physical boundary was mirrored by a spiritual one. In early Irish literature, written down centuries later by Christian monks, Samhain is consistently depicted as a liminal time when the borders between the human world and the supernatural realm of the Aos Sí (spirits or fairies) grew thin.

This is where the history becomes less certain. We have very few contemporary written records from the pre-Christian Celts themselves. We know they held significant communal gatherings and lit massive bonfires, but much of the specific ritual detail popularly associated with Samhain today is based on scholarly interpretation of texts written long after the events they describe.

No. 01

The transition from a regional harvest festival to a recognized fixture on the Western calendar was formalized by the Catholic Church. Originally, the Feast of All Martyrs was celebrated in May. During the 8th century, Pope Gregory III dedicated a chapel in St. Peter’s to all saints on November 1. In 835, at the request of Pope Gregory IV, Emperor Louis the Pious confirmed November 1 as the date for All Saints’ Day throughout the Frankish Empire.

Why the shift? It is often claimed the Church specifically moved the date to overwrite Samhain. While plausible, historians point out that Germanic peoples also observed significant early winter festivals. Moving the feast to November capitalized on a widespread, pre-existing European rhythm of autumn gatherings when food was temporarily abundant following the harvest.

No. 02

In 998 AD, Odilo, the Abbot of Cluny, instituted November 2 as All Souls’ Day for all Cluniac monasteries, a day dedicated to praying for the dead currently in Purgatory. This practice soon spread widely. Together, these days formed a powerful liturgical block. In the language of the time, a holy person was a “hallow.” Therefore, November 1 was All Hallows’ Day, making the night before it All Hallows’ Eve, which eventually contracted into Hallowe’en.

The theological concept of praying for the dead found a practical expression in the community. During the Middle Ages, this took the form of “souling.” The impoverished members of a community would visit wealthier households on All Hallows’ Eve and All Souls’ Day, offering to pray for the household’s deceased relatives in exchange for food, usually small spiced pastries known as soul cakes.

Alongside souling, Scottish sources, and later Irish traditions, document forms of “guising” in which young people went from house to house in disguise, performing for food, coins or other small rewards.

No. 03

By the 18th century, Hallowe’en in Scotland and Ireland had developed into a heavily domestic, community-focused evening of games and divination. What stands out to me is how much of this holiday was historically focused on matchmaking and predicting the future, rather than fear or horror.

Robert Burns’s famous 1785 poem, Halloween, serves as a meticulous record of these practices. He details young men and women pulling stalks of oats to predict the stature of their future spouses, or tossing nuts into the hearth fire to see if they burned quietly together or popped violently apart, indicating a volatile marriage.

No. 04

In Ireland and parts of Britain, people carved faces into turnips and other root vegetables and used them as lanterns. Their exact functions varied, with practical illumination and folk beliefs both becoming associated with the tradition.

The popular folklore attached to these lanterns is the tale of Stingy Jack, a blacksmith who tricked the Devil and was cursed to wander the earth with only a burning coal inside a carved turnip to light his way. It is important to note that this is folklore, an etiological myth created after the fact. Over time, the Jack legend became associated with this existing lantern tradition.

Halloween arrived in North America in fragments, carried largely by the massive influx of Irish and Scottish immigrants fleeing famine and economic hardship in the mid-19th century. They brought their autumn customs to a new environment, but the environment immediately altered the practice.

By the late 19th century, pumpkins were becoming increasingly associated with Halloween celebrations in North America, where they were easier to carve than the tougher root vegetables used in older traditions. The shift from the turnip lantern to the pumpkin jack-o’-lantern is a perfect example of cultural adaptation dictated by local geography.

The specific phrase “trick or treat” is remarkably modern. The modern form of trick-or-treating took shape in North America during the early-to-mid 20th century, drawing on older traditions such as souling, guising and earlier forms of Halloween begging and mischief.

During the early 20th century, Halloween pranks had escalated. What began as tipping over outhouses or unhinging farm gates evolved into serious urban vandalism, property damage, and localized riots during the Great Depression. Communities and civic organizations increasingly promoted organized Halloween activities as a way to reduce destructive pranks and make the holiday more manageable.

The “treat” was explicitly offered to prevent the “trick,” a community effort that helped transform a night of destructive mischief into a predictable, neighborhood-friendly event.

No. 05

Following World War II, the end of sugar rationing and the explosion of suburban development accelerated the commercialization of Halloween. Candy companies capitalized on the existing civic structure, expanding their marketing of individually wrapped sweets specifically for October 31.

Costumes, once handmade from soot, burlap, and old linens, became mass-produced. The folk festival had been heavily adapted by the mid-20th century, shifting the focus from agrarian survival and spiritual reflection to mass consumer participation.

Halloween survived precisely because it was never static. It did not require strict preservation because it constantly adapted to the environment it found itself in. It transitioned from a pastoral boundary marking the end of the harvest, to a liturgical season of mourning, to an immigrant neighborhood custom, and finally to a globally exported commercial event.

The ancient history remains visible if you know where to look. We no longer fear the winter starvation that plagued early agricultural societies, nor do we largely practice the solemn theological vigils of the Middle Ages. But we still carve faces into lanterns, gather around shared food, and turn a season historically associated with darkness and death into a communal celebration.