Halloween, also known as All Hallows' Eve, has its roots in ancient festivals and traditions. The Celts, who lived in what is now the United Kingdom, Ireland, and France, celebrated Samhain, a festival marking the end of the harvest season and the beginning of winter.
The Celts believed that on Samhain, the boundary between the living and the dead became blurred, allowing spirits to return to the world of the living. They would leave food and drink offerings for these spirits, as well as wear costumes and masks to ward off any malevolent entities.
As Christianity spread throughout Europe, the early Christian church attempted to eliminate the pagan traditions associated with Samhain. In the 7th century, Pope Boniface IV designated November 1st as All Saints' Day, a day to honor saints and martyrs.
However, the old Celtic traditions continued to influence the celebrations surrounding this date. The evening before All Saints' Day became known as All Hallows' Eve, later shortened to Halloween.
Today, Halloween is celebrated on October 31st by people all around the world. Children dress up in costumes, trick-or-treat for candy, and participate in other festive activities.
The holiday has also become a popular cultural phenomenon, with movies, TV shows, and video games incorporating elements of horror and fantasy.