Is there any 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 included the movements of the sun, the moon and the five stars and the calculation of their positions. The determination of stars and time is weak and denier; 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, dangerous day, fixed day, holding day, becoming day and opening day are auspicious; In the Gregorian calendar, there are fierce days, full days, weekdays, broken days, closed days and closed days.

Extended data

Almanac, also called imperial calendar, is the code of conduct followed by ancient emperors, which includes 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 the "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 rural people in China for many years (until the early liberation), including lunar calendar, solar calendar (originally not available), climate, sowing season and divination (good or bad years, auspicious days or not), which is also very popular in modern times.

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

References:

Baidu Encyclopedia-Imperial Calendar