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

Speaking of the solstice in winter, people will not feel strange, because it is not only the traditional twenty-four 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 on the Gregorian calendar 65438+February 2 1~23 every year. It should be noted that around winter, 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. 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. 99 is a suitable solar term in northern China, especially in the middle and lower reaches of the Yellow River. From the day of the winter solstice, it enters the "number nine", commonly known as "cross nine", and then every nine days is a unit, called "nine". After nine "nines", it is exactly eighty-one days, that is, "nine out", and then spring blossoms. The widely circulated "99-99 Xiehan Song" from winter solstice, commonly known as "99-99 Song", vividly records the climate and phenological changes between winter solstice and vernal equinox, and also expresses some laws of agricultural activities. The widely circulated song 1929 for removing cold says: "1929 does not shoot, 1949 walks on the ice, 1969 sees the willows, 1979 opens the river, 1999.

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