Why is November in the lunar calendar also called "Winter Moon"?

The date of the lunar calendar is not fixed, but the winter solstice is always 1 1 month, so 1 1 month is called "winter month". In ancient China, the solstice in winter was very important and was regarded as a grand festival. There is a saying that the winter solstice is as big as a year, and there is a custom to celebrate it. "Han Shu" said: "The sun shines on the winter solstice, and you are long, so congratulations." People think that after the winter solstice, the days become longer and longer and the sun rises. This is the beginning of a solar cycle and an auspicious day, which should be celebrated. The Book of Jin records: "On the winter solstice of Wei and Jin Dynasties, people from all over the world celebrated ... its appearance was not as good as that of Zheng Dan." Explain the ancient emphasis on the winter solstice. Now, some places still celebrate the winter solstice as a festival. The northern region has the custom of slaughtering sheep and eating jiaozi and wonton from winter solstice, while the southern region has the custom of eating glutinous rice balls and long noodles from winter solstice on this day. There is also the custom of offering sacrifices to heaven and ancestors in winter solstice in various regions. )