What cultures have been promoted since the birth of the 24 solar terms?

The twenty-four solar terms were all formed in the Warring States Period at the latest. The expressions of "mid-spring", "mid-summer", "mid-autumn" and "mid-winter" appear in Yaodian of Shangshu, which are generally considered as vernal equinox, summer solstice, autumn equinox and winter solstice. In Yi Zhou Shu-Shi Xun Jie, which was found in the tomb of King Wei Anli in the Warring States Period, the 24 solar terms are very complete, and each solar term is divided into three periods and five-day periods, which completely conforms to the division method of modern science and has a very detailed phenological description.

The 24 solar terms are as follows: beginning of spring, rain, fright, vernal equinox, Qingming, Grain Rain, Changxia, Xiaoman, Mangzhong, Summer Solstice, Slight Summer, Great Summer, beginning of autumn, Early Summer, White Dew, Autumn Equinox, Cold Dew, Early Frost, beginning of winter, Light Snow, Heavy Snow, Winter Solstice, Slight Cold. In order to facilitate memory, someone once compiled a jingle: "Spring rain surprises spring and clear valley days, summer is full and summer is hot, autumn is cold and frost falls, and winter snow is cold." In this way, you can remember all the names of the 24 solar terms and their order, which is very labor-saving.

Twenty-four solar terms are divided into solar terms and neutral qi. But now this distinction is generally no longer made, and it is collectively called the twenty-four solar terms. This distinction is still very important in ancient times, because it involves the scientific method of placing leap. Since the appearance of the 24 solar terms, there have been laws to follow. Twelve neutral gases are distributed to twelve satellites respectively. However, because the time between Zhongqi and Zhongqi is longer than the first month of the lunar calendar, the position of Zhongqi in each month will inevitably move back gradually. After a certain accumulation, some months will not be allocated gas, and this month will be a leap month. This method is much more scientific than year-end leap and phenological leap.

Twenty-four solar terms have played an important role in the production and life of working people in China since they came into being. To this day, there is a set of folk proverbs about climate festivals and farming seasons in rural areas of China, such as "Planting wheat in Qingming, and farming in Grain Rain". Long summer goose feathers live, and small birds come to the capital. " Obviously, this is caused by the 24 solar terms. It can be seen that the 24 solar terms have a long history and strong vitality, and it can also be seen that our nation is a nation full of creative spirit.

Twenty-four solar terms are divided according to twelve o'clock. Twelve times is the exploration of the ancients after a long historical process. In order to explain the movement of the sun, the moon and the five stars and the seasonal variation, the week near the ecliptic is divided into twelve equal parts from west to east, and the time when the sun runs from west to east on the starry background on Sunday is a tropic year. Because it has gone through twelve times in turn, it can also be divided into twelve months, which is how the months of the solar calendar are formulated. Then divide the twelve times into two equal parts, which is exactly twenty-four units. Each unit is equipped with a gas, which is the basis for the division of the 24 solar terms.