Winter solstice is one of the twenty-four solar terms and one of the most important solar terms. Winter solstice is a solar term divided by astronomy, which was called "short day" and "short day" in ancient times. From winter to the sun, the sun is located at 270 degrees of the Yellow Meridian, and the sun shines almost directly to the Tropic of Capricorn, which has the shortest day in the northern hemisphere. Accordingly, the daytime from winter solstice in the southern hemisphere is the longest in the whole year.
The winter solstice is also called the winter festival. According to the traditional Chinese calendar, five days are the first class, three days are one day or one breath, and a year is divided into twelve days and twelve gases, which are collectively called twenty-four solar terms. This is the solar term used in the study of choosing a day.
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The Winter Solstice Festival originated in the Han Dynasty, flourished in the Tang and Song Dynasties, and has been passed down to this day. Lu even said that the winter solstice is as big as a year. This shows that the ancients attached great importance to the winter solstice. People think that the winter solstice is a natural transformation of Yin and Yang and a blessing from heaven.
In the Han Dynasty, the winter solstice was the "Winter Festival", and the government held a congratulatory ceremony called "He Dong", which was a routine festival. On this day, the imperial court had a holiday, the army was on standby, the frontier fortress was closed, the business trip was closed, relatives and friends sent meals to each other, visited each other, and had a happy "quiet" festival.
In the Tang and Song Dynasties, the solstice in winter was the day of ancestor worship. On this day, the emperor went to the suburbs to hold a ceremony to worship heaven. On this day, people must worship their parents. There are still some places to celebrate the winter solstice.