How to determine the full day and fixed day in the lunar calendar?

The whole day and sundial in the lunar calendar are related to the position of Eta Ursa major in ancient astrology, and are named after twelve characters. The order is construction, division, enrichment, equality, determination, persistence, destruction, danger, success, acceptance, opening and closing, and enrichment day and fixed day are one of them.

According to the position change of the sun on the ecliptic and the evolution order of the ground climate, the ancients divided a year into 24 segments, which were divided into 12 months, and the "twelve constellations" based on the month reflected the influence of cosmic celestial bodies every day. Every year from the first day after beginning of spring "building", one person a day, in this order. Generally speaking, each word is worth one day, but there are also two consecutive days.

A full day in the twelve digits means perfection, and a fixed day in the twelve digits means that everything is fixed.

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The historical origin of the lunar calendar

According to ancient legends, it was founded in the era of the Yellow Emperor or the Xia Dynasty, also known as the Yellow Calendar and the Summer Calendar. In Chinese, the western calendar is also called the solar calendar, so the lunar calendar is often called the lunar calendar. The earliest existing calendar in China is the Western Han version of Xia Zhengxiao, and the taichu calendar formulated during the period of Emperor Wu of the Han Dynasty has quite perfect calendar rules. Since then, most of them have adopted the "Xia Zheng", that is, the first month is the lunar month; Since then, the rules for determining the new moon and the fixed air have been revised many times. The current version of the lunar calendar is based on the established basic laws, revised by using the achievements of modern astronomy, and calculated completely according to astronomical data. It is an astronomical calendar.

After the founding of the Republic of China, Sun Yat-sen announced the adoption of the western Gregorian calendar, while the traditional calendars in China were called the old calendar and the traditional calendar. The lunar calendar, like the western calendar and the Islamic calendar, is one of the calendars widely used now. In China, many ethnic minority areas, North Korea, South Korea, Vietnam and overseas Chinese communities all over the world, the lunar calendar is widely used as a birthday symbol and various folk festivals, such as the New Year Festival, the Lantern Festival and the Dragon Boat Festival, and is regarded as a symbol of China culture.

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Baidu encyclopedia-twelve satellites