What are the twenty-four solar terms and twenty-four solar terms?

1 and 24 solar terms refer to: beginning of spring, Rain, Sting, Vernal Equinox, Qingming, Grain Rain, Changxia, Xiaoman, Mangzhong, Summer Solstice, Xiaoshu, Dashu, beginning of autumn, Chushu, Bailu, Autumnal Equinox, Cold Dew, Early Frost, beginning of winter, Light Snow, Heavy Snow, Winter Solstice, Slight Cold, etc.

2. It was originally based on the change of stars. The Big Dipper rotates circularly and bucket handle rotates clockwise, which is called one of the "years". The current "twenty-four solar terms" are formulated according to the position of the sun returning to the ecliptic (the earth's orbit around the sun), that is, the annual movement track of the sun is divided into 24 equal parts, each 15 is 1 equal part, and each 1 equal part is a solar term, starting from beginning of spring and ending in the Great Cold. Each solar term is about half a month apart and divided into twelve months. There are two solar terms every month.

3. Twenty-four solar terms are the product of ancient farming civilization, and farming production is closely related to the rhythm of nature. It is a knowledge system formed by ancient ancestors following the farming season and observing the movement of celestial bodies to understand the changing laws of seasons, climate and phenology in a year. Each solar term represents different changes in climate, phenology and time. In the historical development, the 24 solar terms have been incorporated into the lunar calendar and become an important part of the lunar calendar.