Traditional Culture Encyclopedia - The 24 Solar Terms - Who knows whether the 24 solar terms in China are based on the lunar calendar or the solar calendar?
Who knows whether the 24 solar terms in China are based on the lunar calendar or the solar calendar?
The twenty-four solar terms are calculated according to the solar calendar. It is the general name of the twelve solar terms and twelve qi in a year, and it is the date when the sun passes through twenty-four specific positions on the ecliptic in a tropic year (the year calculated by the solar calendar). China used to use the lunar calendar (also known as lunar calendar, ancient calendar and old calendar) for a long time, with twelve moons as a year, and its length was about eleven days different from the tropic year. Set seven leap months in nineteen years, so that their periods are consistent with the tropic year. Therefore, there may be a difference of about half a month between the lunar month and the actual season, which is not conducive to guiding agricultural production. Therefore, astronomers in ancient China named seasons, climate and agricultural production to reflect the seasonal climate and guide agricultural time.
Twenty-four solar terms originated in the Yellow River Basin. Among them, four "Li" (beginning of spring, long summer, beginning of autumn and beginning of winter) is the beginning of the four seasons, and two (vernal equinox and autumnal equinox) and two (summer and winter) are the first half of the four seasons. Twelve solar terms and twelve gases are alternately arranged. In order to facilitate memory, people weave the order of 24 festivals in a year into a jingle:
Spring is full of surprises, valley is clear, summer is full of mountains and summer is connected, autumn heat penetrates autumn frost, winter snow is small and winter cold.
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