What are the 24 solar terms in a year?

The 24 solar terms in a year refer to 24 specific festivals. They are 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, Chufrost, beginning of winter, light snow, heavy snow, winter solstice, slight cold and severe cold.

"Twenty-four solar terms" is the product of ancient farming civilization, and it is a knowledge system formed by ancient ancestors following the farming season and understanding the changing laws of time, climate and phenology in a year by observing the movement of celestial bodies. In ancient times, solar terms were established on the basis of "variable stars" (referred to by bucket handle), but now, solar terms are established on the basis of "the annual apparent movement of the sun" (the degree of the yellow meridian).

Extended data:

In order to express the characteristics of time series more accurately, the ancients divided solar terms into four groups according to climate and phenology: divided, arrived, opened and closed.

1, "fen" is the vernal equinox and autumnal equinox, which was called "dichotomy" in ancient times; "Solstice" is the summer solstice and the winter solstice, which was called "the second solstice" in ancient times. "Open" is beginning of spring and Changxia, "closed" is beginning of autumn and beginning of winter.

2. beginning of spring, Changxia, beginning of autumn and beginning of winter are collectively called "Li Si", adding up to * * * is "Eight Sections". It is called "four seasons and eight festivals" or "eight festivals a year".

Baidu encyclopedia-solar terms

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