Who made the 24 solar terms?

The twenty-four solar terms were invented by Zhuan Xu. Emperor Zhuan Xu ascended the throne at the age of 20, reigned for 78 years and lived to be 98 years old. During his reign, he created Kyushu, which enabled China to have a territorial border for the first time, established a ruling body, made a marriage, made a marriage, studied the differences between men and women, and made the times orderly. Zhuan Xu reformed the calendar, setting four seasons and twenty-four solar terms. Later generations took him as their calendar.

24 solar terms's knowledge system is formed by observing the movement of the sun in a year and understanding the changing laws of the four seasons and climate in a year. It divides the sun's annual trajectory into 24 equal parts, and each equal part is a solar term, starting from beginning of spring and ending with the great cold.

The division of the 24 solar terms.

The twenty-four solar terms are divided according to the position of the earth on the ecliptic (that is, the earth's orbit around the sun). Forward 15 degrees is a solar term; After a week's operation, I returned to the vernal equinox, which is a tropical year with 360 degrees, so it is divided into 24 solar terms. They are: winter solstice, slight cold, severe cold, beginning of spring, rain, sting, vernal equinox, Qingming, Grain Rain, long summer, xiaoman, awn seed, summer solstice, slight summer heat, great summer heat, beginning of autumn, early summer heat, white dew, autumn equinox, cold dew, early frost, beginning of winter, light snow and heavy snow.