What is the solar term Song formula?

The formula of the twenty-four solar terms in Song Dynasty is: Spring rains shock the spring and clear the valley, summer is full and summer is hot, autumn is cold and frost falls, and winter snow falls. The two festivals have not changed every month, with a difference of one or two days at most. The first half of the year is June 2 1 day, and the second half is August 23.

This song is compiled according to the law of names for the convenience of memory. The first four sentences are composed of one word in each solar term in sequence, which is the main body of the whole solar term song, and the last four sentences are the time laws of the 24 solar terms. That is, in the first half of the year, the solar terms are around the 6th and 2 1 of each month, and in the second half, around the 8th and 23rd of each month.

Extended data:

There are twenty-four solar terms throughout the year, which are called in turn: spring rain surprises spring and clear valley days, summer is full and summer is hot, autumn dew is frosty, and winter snow drifts. Beginning of spring, rain, sting, vernal equinox, Qingming, Grain Rain, long summer.

There are Xiaoman, Mangzhong, Summer Solstice, Slight Summer, Great Summer, beginning of autumn, Early Summer, Millennium, Equinox, Cold Dew, Early Frost, beginning of winter, Xiaoxue, First Snow, Winter Solstice, Slight Cold and Severe Cold. The 24 solar terms are evenly distributed in a year, and there are only six solar terms in each season.

Baidu Encyclopedia-solar term song