When my daughter can't go back to her mother's house, what is the importance of the winter solstice?

The saying that "the solstice of winter is not winter, and my father-in-law dies in winter". That is to say, on the solstice of winter, the married daughter can't go back to her mother's house for dinner, but must go back to her husband's house. Or my father-in-law will be in trouble.

What does the daughter-in-law have to do with the happiness and misfortune of the old man when she lives in her family? Although everyone may have this idea, no one dares to deliberately violate it. Who can bear the responsibility in case of a disaster to the old man? Therefore, on the solstice of winter, all married daughters will return to their husbands' families.

Winter solstice, also known as "one-day life", is an important solar term in the China lunar calendar [1]? It is also a traditional festival of the Chinese nation. The winter solstice is commonly known as "Nine Days, Winter Festival", "Dragon Festival" and "Asian Year". 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, and the time is 65438+2 1 in the Gregorian calendar every year.

It is worth noting that around the winter solstice, the earth is located near the perihelion, and its running speed is slightly faster, resulting in that the time of direct sunlight in the southern hemisphere is about 8 days shorter than that in the northern hemisphere in a year, so the winter in the northern hemisphere is slightly shorter than that in summer.

According to modern astronomical science, during the winter solstice, the sun moves to 270 (winter solstice), and the position where the sun directly hits the ground reaches the southernmost point of the year. The sun shines almost directly on the tropic of Capricorn (also known as the winter solstice daily line), and the sun is most biased towards the northern hemisphere. Therefore, the winter solstice is the shortest day and the longest night in the northern hemisphere. The shorter the day, the longer the night. North of the Arctic Circle, the sun is below the horizon all day, which is the widest day of the year in the northern hemisphere. For all parts of the northern hemisphere, the winter solstice is also the day with the lowest sun height at noon all year round. As far as Beijing is concerned, the daytime from winter to sunrise is only 9 hours and 20 minutes, and the height of the sun at noon is only 26 42'. During the winter solstice, the northern hemisphere gets the least solar radiation, about 50% less than the southern hemisphere. After the winter solstice, the stars in the night sky are completely replaced by the stars in winter. From today, they will enter the ninth. At this time, the southern hemisphere is in a hot summer.