Twenty-four solar terms are a precious legacy created by Chinese ancestors. Why use Gregorian calendar time?

Because the Gregorian calendar is widely used in the world, solar terms will be converted into Gregorian calendar through the lunar calendar in conversion of time, and it is not calculated by Gregorian calendar at the beginning.

Twenty-four solar terms were first seen in Tian Zi Xun of Huainan in the Western Han Dynasty, and concepts such as yin and yang, four seasons, eight places, twelve degrees, and twenty-four solar terms were also mentioned in Preface of Historical Records Taishi Gong. Emperor Wu of the Han Dynasty put solar terms into a diachronic period, and stipulated that the month without neutral gas was the last month of leap month.

Twenty-four solar terms, a supplementary calendar established in ancient China, occupies an extremely important position in the traditional farming culture of China, and is the product of long-term observation and research on astronomy and meteorology by the working people in ancient China, which contains the long-standing cultural connotation and historical accumulation of the Chinese nation.

Through it, the ancients can intuitively and clearly understand the changing law of seasonal climate in a year, so as to master the farming season and arrange farming activities reasonably. It not only plays a guiding role in agricultural production, but also affects the food, clothing, housing and transportation of ancient people, and even cultural concepts.