Halloween is a holiday observed 1 on the evening of October 31 in most areas of North America and in some areas of Western Europe. The word “Halloween” comes from “All Hallows' Eve.” November 1, “All Hallows' Day” (or “All Saints' Day”), is a Catholic (天主教的`) festival observed in honour 2 of all saints. All Souls' Day, observed on November 2 to help purify 3 the spirits of the dead, is also closely linked to Halloween.

Most Halloween customs are based on folk beliefs concerning supernatural (超自然的) forces and spirits of the dead. Halloween decorations (裝飾) are typically images of supernatural beings such as witches, werewolves (狼人) , vampires, goblins (小妖怪) , and ghosts. Images thought to symbolize bad omens 4 — such as black cats, bats, owls and spiders — are also commonly used as Halloween decorations. People once believed that ghosts roamed 5 the earth on Halloween. They also thought that all witches met on October 31 to worship 6 the Devil. Today, most people do not believe in ghosts or witches, but these supernatural beings remain symbols of Halloween.

One of the traditions popular on the night of Halloween is trick-or-treat, the main Halloween activity for most children in the United States. Britain imported 7 the custom from America in the early 1980s. On Halloween many children wear ghost costumes 8 and masks or witches' hats and go from door to door to ask their neighbors for candy by saying “Trick or Treat!” The saying implies that if the people in the house give the children a “treat” then the children will not play a trick on them. The neighbors, to avoid having tricks played on them, give the children such treats as candy, fruit, and pennies.

The most celebrated Halloween decoration is the jack-o'-lanterm (把南瓜挖空并雕成人面開形的杰克燈) , traditionally a pumpkin (南瓜) that has been hollowed out and carved 9 to resemble a grotesque (奇形怪狀的) face. Most jack-o'-lanterns contain a candle or some other light, which makes the face visible from far away