Twenty-four solar terms

Twenty-four solar terms: beginning of spring, rain, fright, vernal equinox, Qingming, Grain Rain, Changxia, Xiaoman, Mangzhong, Summer Solstice, Xiaoxia, Daxia, beginning of autumn, Chushu, Bailu, Autumnal Equinox, Cold Dew, First Frost, beginning of winter, Light Snow, Heavy Snow, Winter Solstice, Slight Cold and Severe Cold.

The current "twenty-four solar terms" are divided by "constant gas method", that is, each solar term corresponds to a certain position that the earth reaches every time it runs 15 on the ecliptic; "

The constant air method divides the sun's annual trajectory into 24 equal parts, each 15 is an equal part, and each equal part is a solar term, starting from beginning of spring and ending with severe cold.

"Twenty-four solar terms" express the unique concept of time between human beings and the natural universe, and contain the long-standing cultural connotation and historical accumulation of the Chinese nation.

Extended data:

"Twenty-four solar terms" reflect the influence of the sun on the earth and belong to the solar calendar category. It is a knowledge system formed by observing the movement of the sun in a year and understanding the changing laws of the four seasons, climate and phenology in a year.

It not only plays a guiding role in agricultural production, but also affects the food, clothing, housing and transportation of ancient people, and even cultural concepts. The current lunar calendar absorbs the solar terms of the trunk calendar as a supplement to the calendar, and is adjusted to conform to the tropic year through the leap method, forming a combined calendar of yin and yang.

Twenty-four solar terms are a compass to guide agricultural production, and people can predict the cold, warm, rainy and snowy weather in daily life. In the field of international meteorology, the 24 solar terms are known as "the fifth invention of China".