Reciting formula of 24 solar terms

Reciting formula for 24 solar terms:

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.

I think the twenty-four solar terms refer to the special festivals in the trunk and branch calendars that express the seasons, phenology and climate changes, and the establishment of the "December Construction" used to guide farming in the Han Dynasty. 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.