The Real History Behind Your Halloween Costume

Every October, millions of people slip into costumes without a second thought about where the tradition came from. It's older — and stranger — than most people realize.

The tradition of costumed trick-or-treating traces back to the Celtic holiday Samhain, celebrated more than 2,000 years ago, which marked the Celtic New Year around November 1. Celts believed that on this night, the boundary between the living and the dead grew thin, allowing spirits to walk the earth. To avoid being recognized — or harmed — by these wandering spirits, people wore masks and disguises to blend in, a practice known as "guising." That's the direct ancestor of the ghost and witch costumes still popular today.

The "treat" part of the tradition came later. During the Middle Ages, guising evolved into "souling" — poor people, especially children, would go door-to-door offering to pray for a household's deceased loved ones in exchange for food or money.

Trick-or-treating as Americans know it today is a relatively modern invention. It has been a tradition in the United States for more than a century, but really took off after World War II, when sugar rationing ended and candy companies began running national Halloween advertising campaigns.

So the next time you put on a costume, you're taking part in a tradition that blends ancient Celtic spirit-warding, medieval door-to-door charity, and a mid-century candy industry boom — all rolled into one night.

Browse our current Halloween t-shirt and hoodie collection to be part of the tradition this year.