Who knows the twelve solar terms in Song Dynasty? !

There is no "Twelve solar term song", it should be "Twenty-four solar term song".

Twenty-four solar term song are as follows:

The spring rain shakes the spring and the valley days, 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 current 24 solar terms come from the "Normal Atmosphere Law" concluded more than 300 years ago. "Constant gas method" is a method to determine solar terms according to the position of the sun on the regression ecliptic, that is, on a "ecliptic" with a circumference of 360 degrees (the apparent path of the sun on the celestial sphere for one year), it is divided into 24 equal parts, each equal part is 15, and the spring is divided into 0 degrees (.