The solar terms behind seasons and summer

Midspring, the second month of spring, is the second month of the lunar calendar.

The end of summer is the last month of summer, that is, June of the lunar calendar.

Mid-Autumn Festival, the second month of autumn, is the eighth month of the lunar calendar.

Meng Dong refers to the first month of winter, October of the lunar calendar.

24 solar terms refers to the 24 specific solar terms in the China lunar calendar, which are formulated according to the change of the earth's position on the ecliptic (that is, the earth's orbit around the sun), and each solar term corresponds to a certain position reached by the earth every time it runs 15 on the ecliptic.

Twenty-four solar terms, a supplementary calendar established in the pre-Qin period and completely established in the Han Dynasty, is a knowledge system formed by observing the movement of the sun in a year and understanding the changing laws of the four seasons, climate and phenology 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 severe cold. It is not only a time standard promulgated by successive governments, but also a compass to guide agricultural production. The compass for predicting cold, warm, rainy and snowy weather in daily life is the crystallization of the long-term experience and wisdom of the working people of the Han nationality.