Which solar term is not in summer?

The solar terms that are not in summer include beginning of spring, rain, fright, vernal equinox, Qingming, Grain Rain, beginning of autumn, Chu Xia, Bailu, autumnal equinox, cold dew, first frost, beginning of winter, light snow, heavy snow, winter solstice, slight cold and severe cold.

Twenty-four solar terms are special festivals in the calendar to express natural rhythm changes and establish "December construction". Twenty-four solar terms accurately reflect the change of natural rhythm and play an extremely important role in people's daily life.

It is not only a time system to guide agricultural production, but also a folk system with rich folk customs. The twenty-four solar terms contain a long cultural connotation and historical accumulation, and are an important part of the long history and culture of the Chinese nation.

Twenty-four solar terms are the product of ancient farming civilization, and are the knowledge system formed by ancient ancestors following the farming season and understanding the changing laws of seasons, climate and phenology in a year by observing the movement of celestial bodies. The twenty-four solar terms were originally formulated according to the changes of stars. The Big Dipper rotates once and bucket handle rotates once clockwise, which is called one of the "years" (Figure).

The current "twenty-four solar terms" are formulated according to the position of the sun on the ecliptic, that is, the sun's trajectory in one year is divided into 24 equal parts, each 15 is 1, and each 1 is a solar term. Four years old, three months in spring, summer, autumn and winter, two solar terms each month, each solar term has its own unique meaning.

The origin of solar terms

China's astrological culture has a long history and is profound. The ancients began to explore the mysteries of the universe very early, and thus deduced a complete and profound star-watching culture. Twenty-four solar terms were originally formulated according to the bucket handle rotation direction of the Big Dipper, which rotates circularly and is closely related to the seasonal changes.

The Big Dipper consists of seven stars, namely Shu Tian, Tian Xuan, Tianji, Tianquan, Yuheng, Kaiyang and Yaoguang. Named for its twists and turns. The Big Dipper is an important astrological sign in the northern hemisphere (China is located in the northern hemisphere). The natural rhythm of the corresponding area in the northern hemisphere gradually changed in the repeated rotation of the Big Dipper, which became the basis for ancient people to judge the seasonal changes.