A few days after the winter solstice, counting from the winter solstice.

1, the number nine is counted from the date of the "winter solstice" of the 24 solar terms, and every nine days is counted as a "nine", and so on. Generally, March 9 is the coldest, which is the coldest time of the year. When you count to nine "nine days" (998 1 day), spring will be deep and warm, and everything will be full of vitality. It's time for spring ploughing.

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. However, it was popular at least in the Northern and Southern Dynasties. In the Chronicle of Jingchu, Zong Yi of Liang Chao wrote: "The winter solstice is 998 1 day, which is the end of cold."

2. The date of the winter solstice in the Gregorian calendar is 65438+February 2 1-23 every year, and the eighty-one days of the Ninth Five-Year Plan are calculated by the date of the winter solstice, that is, in the late March of the Gregorian calendar (around the vernal equinox), peach blossoms are in full bloom and spring flowers are in full bloom. Due to the vast territory of China, the climate varies greatly from place to place, not all over the country. Only parts of southern China correspond to the winter solstice "9981, Nine Peach Blossoms, Deep Spring Warm Day".