Who founded the familiar 24 solar terms? How old is it?

Later proclaimed himself emperor. Abolish the system of bird officials and establish the system of five senses. Shao Hao's gossip calendar was abolished, and a more scientific and practical Zhuan Xu calendar was established according to the needs of agricultural production and life at that time. The invention of the twenty-four solar terms was not completed in one day, nor should it be an individual achievement, but the crystallization of collective wisdom and the result of several generations' observation and practical research. The accurate calculation of leap year should be done by Zu Chong, an ancient scientist in China. Unlike China, China has a continental climate with cold winters. Therefore, spring sowing and autumn harvest must be carried out in strict accordance with the solar terms, otherwise the hard work of one year will be in vain.

It is the crystallization of the historical experience and wisdom of the working people in China, which was further divided into spring, summer, autumn and winter in the Zhou Dynasty. About 2500 years ago, during the Spring and Autumn Period and the Warring States Period, there were four solar terms: the second solstice (winter solstice, summer solstice) and the second vernal equinox (vernal equinox, autumn equinox). It should be said that it is the intangible cultural heritage of China. Twenty-four solar terms originated in the Yellow River Basin. After continuous improvement and perfection, in 104 BC, Deng Ping formulated the taichu calendar, and formally set 24 solar terms in the calendar.

Are based on the orbit of the sun, so the duration is the closest. China was the western calendar introduced after the Revolution of 1911, and it was not until the founding of People's Republic of China (PRC) that the name of the Republic of China was stopped. They are all used with the China lunar calendar. Fine finishing, recorded in writing. Who the hell is it? Who wrote it down? There's no way to prove it now. So, now we attribute this matter to Zhuan Xu, the emperor of primitive society. From the climatological point of view, the twenty-four solar terms are the laws of seasonal and climatic changes gradually recognized by the people of China in the long-term production practice, which embodies the scientific attitude and correct views and methods of China people towards nature.

There are 30 days in each month, so the difference between the number of days in this year and the number of days in the solar calendar is more than 5 days, so it will increase by one month every 2 to 4 years, which is called leap month. The leap month is added to the year, which needs to be judged by referring to the 24 solar terms. A year with a leap month is called a leap year.