What are the 24 solar terms? Which dynasty was it? Who proposed it?

Twenty-four solar terms refer to 24 special festivals in the lunar calendar of China, indicating the seasonal changes. They are formulated according to the position change of the earth on the ecliptic (that is, the orbit of the earth around the sun), and each one corresponds to a certain position reached by the sun every time it runs 15 on the ecliptic.

As early as the Eastern Zhou Dynasty, the Spring and Autumn Period and the Warring States Period, the working people of the Han nationality had the concept of "being far away from the north" and "being far away from the north". Subsequently, people divided the year into 24 equal parts according to the natural phenomena such as the running position of the sun and the moon at the beginning and middle of the month, the weather and the growth of animals and plants. And give each equal part a proper noun, that is, twenty-four solar terms. By the end of the Warring States Period, solar terms had eight names: beginning of spring, Equinox, Long Summer, Summer Solstice, beginning of autumn, Equinox, beginning of winter and Winter Solstice. These eight solar terms are the most important of the 24 solar terms. Mark the seasonal changes and clearly divide the four seasons of the year. By the Qin and Han Dynasties, the 24 solar terms had been completely established.

The 24 solar terms are: winter solstice, slight cold, severe cold, beginning of spring, rain, fright, vernal equinox, Qingming, Grain Rain, long summer, xiaoman, Miscanthus, summer solstice, slight summer heat, great summer heat, beginning of autumn, early summer heat, white dew, autumnal equinox, cold dew, early frost, beginning of winter, light snow and heavy snow.