The seal script of the twenty-four solar terms is as follows:
The twenty-four solar terms refer to the specific seasons in the Ganzhi calendar that represent seasons, phenology, climate changes and establish the "Twelve Months" . It was originally determined by the direction of the handle of the Big Dipper. The handle rotates around the east, south, west and north, which is a cycle, which is called a "year" (photo).
Each rotation cycle begins with the beginning of spring and ends with the great cold. The current "Twenty-Four Solar Terms" are divided by the "Ding Qi Method", that is, each solar term corresponds to a certain position that the earth reaches every 15° on the ecliptic; the "Ding Qi Method" divides the annual movement trajectory of the sun. Make 24 equal parts.
Each 15° is an equal part, and each equal part is a solar term, which begins at the beginning of spring and ends with the great cold, and so on. The "Twenty-Four Solar Terms" express the unique concept of time between humans and the natural universe, and contain the long cultural connotation and historical accumulation of the Chinese nation.
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Features
The "twenty-four solar terms" reflect the impact of the sun on the earth and belong to the solar calendar. It is a knowledge system formed by observing the annual movement of the sun and understanding the changes in seasons, climate, phenology and other aspects throughout the year. It not only plays a guiding role in agricultural production, but also affects the ancient people's clothing, food, housing, transportation, and even cultural concepts.
The lunar calendar currently used absorbs the solar terms elements of the Ganzhi calendar as a supplement to the calendar, and adjusts it through the "leap method" to make it consistent with the return year, forming a combined lunar calendar. ?
The twenty-four solar terms are not only the time criterion promulgated by the governments of the past dynasties, but also the compass guiding agricultural production. In daily life, people use the compass to predict cold, warm, snow and rain. In the international meteorological community, the twenty-four solar terms are known as "China's fifth greatest invention." On November 30, 2016, the Twenty-Four Solar Terms were officially included in the UNESCO Representative List of Intangible Cultural Heritage of Humanity.
Reference material: Baidu Encyclopedia-Twenty-four solar terms (twenty-four specific festivals in the calendar)