Who wrote the Gregorian calendar and how?

According to legend, it was created by the Yellow Emperor, so it was called the Yellow Calendar. In ancient times, it was calculated and published by Qin Tian Jian, so it was also called the imperial calendar. Based on the solar calendar of the China lunar calendar, there are many calendars that indicate good luck or bad luck for a day. Origin: Almanac existed in China at the latest in the Qin Dynasty as a guide book for people's life. From about the Song Dynasty, the magic number of "avoiding evil spirits" appeared in the almanac. Taiding has a five-year period (1328), and there are more than three million official almanac books. The astrological content of the almanac is often criticized as superstition. The yellow calendar promulgated by the Christian Taiping Heavenly Kingdom removes all taboos and only indicates solar terms and sundays; The yellow calendar promulgated during Xuantong's reign in the Qing Dynasty also prohibits the publication of taboos, conflicts, directions, fleeting time and traditional ages. During the Japanese occupation of Taiwan Province, there was only "appropriateness" and no "taboo"; After the recovery of Taiwan, it was all restored. The ancient almanac was issued by Qin, and after the Republic of China, it was issued by Wushu and Japanese teachers. Local fortune tellers can hang up the hall number and publish it separately, or sell the copyright as a gift from public and private institutions. For thousands of years, almanac has been the best-selling book among the people in China. At present, there are about five or six million yearbooks printed in Taiwan Province Province every year. Many modern people still rely heavily on almanac. Scholars believe that the popularity of the Huangli calendar for thousands of years reflects that China people believe in the concept of auspicious choice because of the uncertainty of life. About two-thirds of the almanac and general books in Taiwan Province are claimed to have inherited the "Jichengtang" general books in Hong Chao and Fujian two hundred years ago; The source of Hong Kong's popularity is Shu Tong of Luo Chuanlie, the "Taoist Temple" in Guangdong. The main contents of the Gregorian calendar are the schedule of the twenty-four solar terms, the good and bad luck of each day, the luck of the zodiac and so on.