How is 192939 calculated?

192939' s jingle goes like this: 1929 don't shoot, walk on the ice in 3949, watch the willows along the river in 5969, open the river in 79, bring geese in 89, and add 19 in 99, and plow cattle everywhere. (China folk widely circulated "99-year-old songs to relieve cold", commonly known as "99-year-old songs". There are many versions of 99 ballads. )

The number nine method is passed down from mouth to mouth among the people in our country, which has a history and lacks records. As for when it originated, there is no exact information. In traditional culture, nine is the extreme number, the "supreme yang" number and the largest number. The accumulation of "Zhiyang" means that Yin Qi is decreasing day by day, and it is tired to the end, which means that the cold is getting warmer and "the spring is deep".

Calculation method

From the solstice of winter to the unhealed day of winter (the first unhealed day in winter is called "Jiao Jiu", which means the beginning of cold), every nine days is called "Jiu", the first nine days are called "Jiu Jiu", the last nine days are called "Er Jiu", and so on, and the weather is warm until "Jiu Jiu" and "Jiu Tao Hua".

As the saying goes, "Summer solstice is three years old, and winter solstice is nine years old." . It is generally the coldest in April and September, which is the coldest period of the year; By the Ninth Five-Year Plan, the cold had disappeared and spring was warm in bloom.

The correct algorithm of "counting nine" begins from winter to the first nonunion day in the future. Therefore, the specific date of "September" every year is not fixed, depending on the first nonyl day after the winter solstice.