Is the winter solstice the same day every year? Is it the same day as the number nine?

People will not feel strange when talking about the winter solstice, because it is not only the traditional 24 solar terms in China, but also a traditional festival in China. So the winter solstice is the same day every year? Is the solstice in winter the same day as the number nine? Let's learn about this festival from the past!

Is the winter solstice the same day every year? It doesn't have to be 65438+February 2 1~23 every year. It should be noted that around the winter solstice, the earth is located near the perihelion, and its running speed is slightly faster, which leads to 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. From the winter solstice to the next winter solstice, it is equivalent to a tropical year, with a length of 365.2422 days. The accumulation of decimals and the setting of leap years make the date of winter solstice change slightly.

Is the solstice in winter the same day as the number nine? The number nine is the first day of the winter solstice. Jiujiu is a more suitable solar term in northern China, especially in the middle and lower reaches of the Yellow River. From the day of winter solstice, it entered the "number nine", commonly known as "cross nine", and then every nine days as a unit, which is called "nine" After nine "nines", it is exactly eighty-one days, that is, "nine out", and then spring blossoms. The widely circulated "Jiujiu Song for Eliminating Cold" from the winter solstice, commonly known as "Jiujiu Song", vividly records the climate and phenological changes between the winter solstice and the vernal equinox, and also expresses some laws of agricultural activities. The widely circulated 1929 Song for Eliminating Cold said: "1929 don't shoot, 1949 walk on the ice, 1969 see the willows, 1979 open the river,/kloc-0.

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