The winter solstice is one of the traditional festivals in China and one of the twenty-four solar terms in China. Generally, it is on December 21st or 22nd every year, which means that when the sun reaches 27 degrees of the ecliptic, the days in the northern hemisphere are the shortest and the nights are the longest. The Winter Solstice is usually translated into "Winter Solstice" in English, where "winter" means winter and "solstice" means that the sun reaches the southernmost or northernmost point on the yellow meridian, which are called "winter solstice" and "summer solstice" respectively, and are the most unbalanced days of the year.

In western countries, the winter solstice is usually regarded as the eve of Christmas and one of the most important festivals in a year. In the Nordic countries, people will light bonfires to celebrate "the return of sunshine", which means that the winter solstice is the darkest day of the year, but it also indicates that spring is coming and the light will return. In China, the Winter Solstice is also a traditional festival. People will eat traditional foods such as "Winter Solstice jiaozi" and "Winter Solstice Tangyuan", which means reunion and auspiciousness.