Why do northerners eat jiaozi on the solstice in winter?

The winter solstice is a very important solar term in China. The winter solstice festival is one of the traditional festivals of the Han nationality, which originated in the Han Dynasty and flourished in the Tang and Song Dynasties. The winter solstice is commonly known as "Winter Festival", "Dragon Solstice Festival" and "Asian New Year Festival". As early as 2500 years ago, during the Spring and Autumn Period, China observed the sun with the soil return, and determined the winter solstice. It is the earliest of the 24 solar terms, with the time between 65438+February 2 1 to 23, and it is the shortest day in the northern hemisphere. On the solstice of winter, there are different customs in the north and south of China. Jiaozi is eaten in most areas in the north, and glutinous rice balls are eaten in the south. There is also a proverb: When winter solstice comes, eat jiaozi, as well as poems and film and television works about this solar term.