The short version: Halloween is celebrated on October 31, the evening before the Christian feast of All Saints’ Day. The English name comes from “All Hallows’ Eve.” The holiday as people experience it today is a mix of traditions that developed over time; no single custom explains all of Halloween.
Why is Halloween on October 31?
In the Western Christian calendar, All Saints’ Day falls on November 1, and All Souls’ Day follows on November 2. The evening before All Saints’ Day was called All Hallows’ Eve; over time, that name became Halloween. October 31 is now the familiar date for costumes, neighborhood visits and seasonal celebrations in the United States.
Halloween is also often discussed alongside older autumn observances, including the Gaelic festival of Samhain. The histories are connected in some accounts, but it is too simple to say that every modern Halloween custom comes directly from one ancient festival. Religious calendars, migration, local folklore and popular culture all shaped what people do.
Where did trick-or-treating come from?
Going door to door for food or small gifts has parallels in several older customs, including “souling” and “guising.” In the United States, neighborhood trick-or-treating developed into a widespread family activity during the twentieth century. Today, participation varies: some communities organize trunk-or-treat events, parties or indoor celebrations instead.
Why do people carve pumpkins?
Carved lanterns have a long association with autumn folklore. In Ireland and Scotland, people carved turnips or other root vegetables. When immigrants brought customs to North America, pumpkins—larger and easier to carve—became a practical substitute. A lit jack-o’-lantern also turns an ordinary doorstep into a small seasonal signal.
What does Halloween mean today?
For many people, Halloween is less about a fixed set of beliefs and more about shared play: choosing a character, telling a ghost story, decorating a porch, watching a film or meeting neighbors. Families and communities make their own version, including opting out or choosing a daytime event.
A short, reliable reading list
The Library of Congress provides a useful overview of the development of Halloween customs. Its historians describe multiple influences rather than a single origin story.
Want to make something for the holiday? See our costume ideas, movie guide and decoration planner.