When is the opening day of the yellow calendar?

Jiaojiu, also known as Jiujiu, is a folk method for calculating the date of cold weather and warm spring flowers in China. It is usually the coldest in March and April, 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.

"Law No.9" is passed down from mouth to mouth among the people in our country, with a long history and lack of records. As for when it originated, there is no exact information. In traditional culture, nine is an extreme number, which is the "most positive" number and the largest number. The accumulation of "the supreme sun" means that Yin Qi is decreasing day by day, and it is exhausted to the end, which means that the cold has gone warm and "the spring is deep".

Related instructions

Counting nine is one of the popular customs in China. Counting nine means counting from the date of winter solstice (also known as counting from winter solstice), counting nine every nine days, and so on. As the saying goes, "It's hot in three days, cold in four or nine days", and the coldest period in a year is "three or nine days". Count to nine until eighty-one days, when the peach blossoms open at nine o'clock. At this time, the cold has passed and the weather is warm.

Due to the vast territory of China, the climate varies greatly from place to place. Only some parts of China, not all parts of the country, conform to the winter solstice "9981, nine peach blossoms, late spring and warm days", and some cold areas have no breath of spring.