Halloween, also known as All Saints' Day, is a traditional western festival on October 1 every year. On the eve of Halloween, October 31th is the most lively moment of this festival. To celebrate Halloween, children will dress up as all kinds of cute ghosts and knock on the door from house to house, asking for candy, or they will be naughty. At the same time, it is said that on this night, all kinds of ghosts will dress up as children and mingle with the masses to celebrate the coming of Halloween, while human beings dress up as ghosts in order to make ghosts more harmonious.

More than 2,111 years ago, Christian churches in Europe designated October 1 as the "Day of All Saints in the World". Legend has it that since 511 BC, Celts living in Ireland, Scotland and other places have moved this festival forward by one day, that is, October 31. They think that this day is the day when summer officially ends, that is, the beginning of the new year and the beginning of the harsh winter.

Halloween was originally a festival to celebrate autumn, just as May Day is a festival to celebrate spring. Druid, a priest of ancient Gaul, Britain and Ireland, had a grand festival to praise autumn, which lasted for a whole day from midnight on October 31th to October 1th the next day.