China Ancient Cultivated Land Formula

The ancient cultivated land in China was cultivated according to the 24 solar terms.

Twenty-four solar terms table is a supplementary calendar made by China to guide farming in ancient times, and it is the crystallization of long-term experience and wisdom of working people of ancient Han nationality. It was formed in the Spring and Autumn Period and the Warring States Period. Because the lunar calendar in China is a kind of "yin and yang calendar", which is based on the movement of the sun and the moon, it can't fully reflect the solar cycle. But China is an agricultural society, and agriculture needs a strict understanding of the movement of the sun, so farming is entirely based on the sun. Therefore, the "twenty-four solar terms" that reflect the solar cycle alone are added to the calendar as the standard for determining leap months. Twenty-four solar terms can reflect the changes of seasons, guide agricultural activities and affect the food, clothing, housing and transportation of thousands of families. The twenty-four solar terms are divided according to the position of the sun on the ecliptic (that is, the orbit of the earth around the sun).

Twenty-four solar terms table

Dating in spring, dating in summer, dating in autumn and dating in winter.

3-5 February in beginning of spring, 5-7 May in the long summer, 7-9 August in beginning of autumn, and 7-8 October in beginning of winter165438+/kloc-0.

February rain 18-20, summer may 20-22, light snow August 22-24,165438+1October 22-24.

March 5-7 in a daze, June 5-7 mango seeds, September 7-9 white dew, heavy snow 65438+February 6-8.

Equinox March 20-22 Summer to June 2 1-22 Autumn Equinox September 22-24 Winter to June 2 1-23

Tomb-Sweeping Day, April 4-6, light summer, July 6-8, cold dew 65438+1October 8-9, slight cold 65438+1October 5-7.

Grain Rain April 19-2 1 First Frost on July 22 -241Great Cold on October 23-24 65438+1October 20-2 1.

Twenty-four solar term song

The spring rain shakes the spring and clears the valley, and the summer is full of mountains and summers. Autumn dew, autumn frost, little snow in winter and cold in winter. The two festivals remain unchanged every month, with a maximum difference of one or two days. The first half of the year is June 2 1 day, and the second half is August 23.