The Real History of Halloween

It Did Not Start With Costumes

Every October, billions of people dress up, carve pumpkins, and eat enormous amounts of candy. Most of them have no idea where any of this comes from. The modern version of Halloween is so saturated with commercial packaging that the original shape of the holiday is almost invisible underneath it. But the original shape is fascinating — and considerably darker than a plastic skeleton from a party supply store.

The story of Halloween spans roughly 2,000 years and three distinct cultures: Celtic, Roman Catholic, and eventually American. Each one took what it needed from the thing before it and added its own layer. What you get at the end is a genuine historical palimpsest — a holiday written over and over until the first draft is barely legible.

Samhain: The Celtic New Year

The clearest ancestor of Halloween is Samhain (pronounced "SAH-win"), a festival observed by the Celtic peoples of Iron Age Britain and Ireland. The Celts divided their year into two halves: the light half, which ran from May to October, and the dark half, which ran from November to April. Samhain marked the boundary between them — the Celtic new year, falling on or around November 1.

Boundary moments carried spiritual weight for the Celts. The boundary between seasons, like the boundary between life and death, was understood as a place where the normal rules didn't quite apply. On Samhain eve, the veil between the living world and the world of the dead was believed to thin. The dead could walk among the living. Spirits, good and dangerous alike, were more present than usual.

Celtic communities responded to this in practical ways. They extinguished their hearth fires, which left homes cold and dark — less inviting to wandering spirits. Then the community gathered for a central ceremonial bonfire, which the druids (Celtic priests) lit using ritual friction methods. At the end of the festival, people lit torches from this communal fire and used them to relight their home hearths. The message was: we have passed through the danger together, and now we return.

The practice of wearing costumes also has roots here, though not the cheerful kind. Some historians argue that people dressed in animal skins and masks to disguise themselves from malevolent spirits — if a demon couldn't tell you were human, it might leave you alone. Others suggest the costumes allowed people to move between the worlds, to take on a liminal identity that matched the liminal moment.

Food offerings were left at doorways and crossroads to appease the dead. Divination was practiced: apples were peeled in long strips and thrown over the shoulder to reveal the initial of a future spouse, hazelnuts were roasted to predict romantic outcomes. The connection between Halloween and fortune-telling is ancient.

Rome Arrives and Adds Its Own Layers

When Rome conquered Britain in 43 CE, it brought two festivals of its own that would eventually blend with Samhain traditions. The first was Feralia, a Roman festival in late October that honored the dead. The second was a celebration in honor of Pomona, the goddess of fruit and trees. Pomona's symbol was the apple — which may explain why bobbing for apples became a Halloween tradition. The Roman and Celtic practices had separate origins but similar timing, and over two centuries of occupation they began to merge.

The Catholic Church Rewrites the Calendar

As Christianity spread through Britain and Ireland in the early medieval period, the Church faced a recurring problem: Celtic communities had deep attachments to their existing festivals, and simply banning them rarely worked. Pope Gregory I, writing to missionaries in Britain around 601 CE, advised them to co-opt pagan holy sites and redirect existing festivals toward Christian purposes rather than suppressing them outright. It was a strategic decision that shaped the rest of Halloween's history.

In the eighth century, Pope Gregory III moved the Christian feast of All Saints' Day from May 13 to November 1. The timing was not accidental. All Saints' Day — also called All Hallows' Day — honored Christian martyrs and saints. The evening before it became "All Hallows' Eve," shortened eventually to "Hallowe'en" and then "Halloween." A second observance, All Souls' Day, was added on November 2 to honor all the faithful dead.

The Christian calendar now bracketed the old Celtic boundary period with official observances. The practice of praying for the dead, leaving food offerings, and lighting fires continued — but now with a Christian frame. In some parts of Britain and Ireland, people went "souling" on All Souls' Day, moving door to door and offering prayers for the dead in exchange for small cakes. This is a direct ancestor of trick-or-treating.

How It Crossed the Atlantic

Halloween was not a significant holiday in early America. The Puritan communities of New England actively disapproved of it — they associated it with Catholic and pagan practices, neither of which they had much patience for. The holiday was more alive in the South, where different European influences created more cultural flexibility.

The real turning point was the massive wave of Irish immigration triggered by the Great Famine of the 1840s and 1850s. Irish immigrants brought their Halloween traditions with them, including the Jack-o'-lantern. In Ireland, the original lanterns were carved from turnips, not pumpkins — pumpkins were an American crop, but they were bigger, easier to carve, and more widely available, so the tradition adapted.

By the late nineteenth century, Halloween was spreading across the United States, but it was still a relatively rough-edged holiday. Communities were trying to figure out what to do with it. The early American version involved considerable vandalism — tipping outhouses, soaping windows, letting livestock loose. Town leaders and community organizations pushed to domesticate it, emphasizing neighborhood parties, games, and candy as alternatives to mayhem.

The Candy Industry and the Modern Holiday

Trick-or-treating as Americans know it today — children in costumes going door to door collecting candy — solidified in the 1920s through the 1950s. The candy industry played a significant role in cementing this version of the holiday. In the early twentieth century, Halloween treats included homemade items: cookies, fruit, nuts, coins. Candy companies ran advertising campaigns in the 1950s that reframed the holiday around their products specifically. Pre-wrapped candy was safe, convenient, and scalable in ways that home-baked goods weren't.

The "razor blade in candy" panic of the 1970s and 1980s reinforced this shift — despite the fact that documented cases of strangers deliberately poisoning Halloween candy are essentially nonexistent, the panic made parents distrust homemade treats and stick to factory-sealed products. The candy industry benefited from a moral panic that, in retrospect, was almost entirely manufactured.

Today, Americans spend roughly $10 billion on Halloween each year. It is the second-largest commercial holiday in the country after Christmas.

The Symbols and What They Mean

Most Halloween symbols trace back to specific historical moments. The Jack-o'-lantern comes from an Irish folktale about a man named Stingy Jack who tricked the Devil and was condemned to wander the earth with only a carved-out turnip and an ember for light. Black cats were associated with witchcraft in medieval Europe — suspected familiars of witches, creatures that moved at night and were associated with death and bad fortune. Witches themselves became Halloween figures through the medieval Christian conflation of pagan wise women with servants of Satan. Skeletons and skulls are straightforward: the dead walk near on this night.

Spider webs suggest neglect, abandonment, the places the living have left behind for the dead to occupy. Bats appear because they were common at the original Samhain bonfires — insects swarmed the fire, and bats followed the insects. People watching the festivities saw bats circling the flames and associated them with the ritual.

What Survives From the Beginning

Strip away the candy wrappers and inflatable decorations, and you can still find Samhain underneath Halloween. The date is the same — the eve of November 1. The core logic is the same: this is the time of year when the dead are close, when the boundary between worlds is thin, when it pays to take precautions. The costumes, the fire, the food offerings, the attention to the world of spirits — all of it traces back to Celtic Iron Age communities gathered around bonfires in the British Isles more than two thousand years ago.

The holiday has been rewritten multiple times by multiple cultures, each of which had its own reasons for keeping it while changing what it meant. That is not dilution. That is how living traditions work. Halloween survived because it addresses something real: the human need to acknowledge death, to mark the turn toward winter and darkness, and to do it together, in community, with fire and ritual and a little bit of controlled fear.

The costumes just got cheaper and the candy got worse. The instinct behind it is as old as anything we have.