Halloween is celebrated because it began as an ancient tradition marking the end of summer and the start of winter. Over 2,000 years ago, the Celts, who lived in parts of Europe, held a festival called Samhain on 31 October. This was a very important time for farming communities because it signalled the change of seasons and the start of the harsh winter months. People believed that during Samhain, the boundary between the living and the dead became thin, allowing spirits to return to Earth.

The Celts feared that these wandering spirits could cause harm or bring bad luck to crops and families. To protect themselves, they lit large bonfires and wore costumes made from animal skins to scare away ghosts. These fires were also used for sacrifices and rituals to honour gods and spirits. This practice was deeply rooted in their belief system and showed how closely their lives were connected to nature and the seasons.

As time passed and Christianity spread across Europe, many old traditions were adapted rather than erased. The Church introduced All Saints’ Day on 1 November to honour saints and martyrs. The evening before became known as All Hallows’ Eve, which eventually shortened to the word Halloween. This blending of Celtic customs with Christian practices changed the meaning of the celebration, making it more about remembering holy figures and loved ones who had died.

During the Middle Ages, people continued to observe Halloween with a mix of old and new customs. Instead of focusing only on spirits and protection, communities began holding feasts and prayers for the dead. Some traditions, like wearing costumes, remained but took on new meanings. Over time, these customs travelled to other parts of the world, especially through migration and cultural exchange.

In later years, particularly in America, Halloween transformed into a fun and family-friendly holiday. Immigrants brought their traditions, and these evolved into new activities. People started carving pumpkins into lanterns called jack-o’-lanterns, inspired by old Irish stories. Dressing up in costumes became popular, and games like apple bobbing were introduced. Trick-or-treating also emerged, where children go from house to house collecting sweets, turning Halloween into a joyful event for communities.

Today, Halloween is celebrated in many countries around the world, although the customs vary. In the United States, it is one of the biggest holidays of the year, with millions spent on costumes, decorations, and candy. People enjoy watching scary films, attending themed events, and taking part in activities like pumpkin carving and trick-or-treating.

• In the US, over $10 billion is spent annually on costumes, decorations, and candy
• 77% of households in the UK participate in Halloween activities
• Jack-o’-lanterns originated from Irish lantern traditions before pumpkins were used
• Halloween is increasingly celebrated in countries such as Japan, Australia, and Germany