The ancients thought that by the winter solstice, although it was still in the cold season, spring was not far away. At this time, people who go out will go home for the winter festival, indicating that they will have a home at the end of the year. People in Fujian and Taiwan believe that the annual winter solstice is a festival for family reunion, because it is a day to worship ancestors. If you go out and don't go home, you are a person who denies your ancestors.
The winter solstice is the longest night in a year. Many people use this night to make a "winter solstice circle" with glutinous rice flour. In order to distinguish it from the "resignation" on the eve of the Spring Festival, the day before the winter festival is called "adding years" or "sub-years", which means that the "year" is not over yet, but everyone has grown one year.