What is the formula of the twenty-four solar terms?

The formula of 24 solar terms is as follows:

The spring rain shakes the spring and clears the valley, and the summer is full of mountains and summers.

Autumn dew, autumn frost, little snow in winter and cold in winter.

The two festivals remain unchanged every month, with a maximum difference of one or two days.

The first half of the year is June 2 1 day, and the second half is August 23.

? The origin of the twenty-four solar terms

Twenty-four solar terms originated in the Yellow River Basin and are the crystallization of the long-term experience and wisdom of the ancient working people in China. Agricultural culture, trunk and branch calendars, observation images and time.

Twenty-four solar terms refer to the special festivals in the trunk and branch calendars that express seasons, phenology, climate change and establish "December construction", which were used to guide farming in the Han Dynasty. The intersection time of the 24 solar terms is the natural result of celestial motion. It basically summarizes the exact time of the alternation of four seasons in a year and the laws of some natural phenomena such as phenology in nature.