How many days is the seven nine songs?

79 refers to the fifty-fifth day to the sixty-third day from the winter solstice of the lunar calendar.

China has been in cold weather for several years since the winter of November. Astronomical experts said that "the Ninth Five-Year Plan" is a more applicable 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, called "nine". After nine "nines", it is exactly eighty-one days, that is, "nine out", and then spring blossoms.

Extended data

Jiujiuge

Beijing Edition: 1929 No Hands. Three, nine, four, nine, walking on the ice. Look at the willows by the river. Seven or nine rivers open and eight or nine swallows come. 99 plus 19, plowing cattle everywhere.

Shanxi Edition: 1929 is not nine, 3949 is called a dog. 5969 opens the door, 7989 opens the river to see the willows, and 99 adds.

Sichuan Edition: 1929, I stepped into my arms; 3949, frozen pigs and frozen dogs; 5969, look at the willows by the river; In 7963, pedestrians on the road put clothes on their shoulders; 8972, cats and dogs lying in the shade, 998 1, Tian Zhongli, the old man of crops.