Is there a scientific basis for the Gregorian calendar?

Lao Huang Li, an ancient calendar in China, is a work of compiling astronomical almanac. It includes many important contents of ancient astronomy in China and is the crystallization of ancient scientific observation and research.

The ancient calendar of China also includes the movements of the sun, the moon and the five stars and the calculation of their positions. Determination of stars and time in "Hundan": The forecast of solar eclipse and lunar eclipse is used to choose auspicious days. The white tiger, the heavenly punishment, the suzaku, the heavenly prison, the Xuanwu and the Gouchen in the Yellow Calendar are the evil days of the six underworld.

In the zodiac, Qinglong, Tiande, Yutang, Siming, Tang Ming and Jingui are auspicious days of the six zodiac signs. In the yellow calendar, except for the day, the dangerous day, the fixed day, the holding day, the success day and the opening day are auspicious; In the Gregorian calendar, a day, a whole day, a working day, a broken day, a closed day and a closed day are fierce.

Extended data

The almanac, also known as the imperial calendar, is a code of conduct followed by ancient emperors, including not only astronomy, meteorology, seasonal seasons, but also some taboos that people should abide by in their daily lives.

At the beginning of its formation, only the emperor's family could use it, so it was called "imperial calendar". After the Revolution of 1911, the imperial system was overthrown and the "imperial calendar" was rewritten as the "yellow calendar".

There is also a solar calendar in the yellow calendar. Gregorian calendar is a seasonal pamphlet used by ordinary people in rural areas of China for many years (until the early liberation), including lunar calendar, solar calendar (originally not available), climate, sowing season and divination (good or bad age and auspicious days), which is also very popular in modern times.

Old and new coexist. As an ancient China person, although the solar calendar has been widely used in the high-tech era, many people still have to refer to the traditional lunar calendar when planting crops or getting married. According to this calendar, China people still welcome every major traditional festival (Spring Festival, Lantern Festival, Dragon Boat Festival and Mid-Autumn Festival) no matter where they are.

References:

Baidu Encyclopedia-Emperor Calendar