Halloween traditions developed over centuries, combining Celtic, Roman, Christian and European folklore influences.
c. 2000 BCE–100 CE: Celtic Festival of Samhain
Samhain marked the end of the harvest and the beginning of the Celtic New Year. Many Celts believed the boundary between the living and dead became blurred on the night of 31 October. Bonfires, food offerings and disguises were used to provide protection and honour spirits.
c. 100–400 CE: Roman Influence
After the Roman conquest of Celtic lands, traditions linked to Pomona, the Roman goddess of fruit and orchards, may have influenced autumn customs such as apple games and fortune-telling.
c. 700 CE: Christian Allhallowtide
The Christian observance of Allhallowtide developed around remembering the dead. It begins with All Hallows’ Eve (31 October), followed by All Saints’ Day (1 November) and All Souls’ Day (2 November), honouring saints, martyrs and departed loved ones. The name Halloween comes from the Scottish term Hallowe’en, meaning “All Hallows’ Evening”.
15th–17th centuries: Witches and Folklore
European beliefs about magic, witches and supernatural beings became increasingly associated with Halloween.
Early 1800s: Gothic Literature
Ghost stories and Gothic novels popularised haunted settings, monsters and supernatural themes that shaped Halloween imagery.
Early 1900s: Halloween Celebrations
Community Halloween parties, neighbourhood events and early forms of trick-or-treating became popular in North America.
1930s–1950s: Horror Cinema
Films featuring monsters, vampires and haunted locations helped establish the modern spooky style of Halloween.
Late 1900s–2000s: Modern Halloween
Costumes, decorations, haunted attractions and themed events became increasingly commercialised. Through global media and popular culture, Halloween spread internationally, sometimes occurring alongside other traditions such as Día de los Muertos.