What is a birthday?

Date of birth, abbreviated as eight characters, refers to the calendar date when a person is born; There are four pillars and branches on it, engraved with the year, month and day respectively, each with two words, a total of eight words. Birthday plays an important role in Chinese folk beliefs, and Taoist priests and astrologers in ancient China calculated people's fate accordingly.

The eight-character prediction has been developing continuously in practice, from Li's three-column theory to the four-column theory, and then to the four-column theory of the sun, the moon and the human biological rhythm. Every step of progress contains the painstaking efforts of scholars and social practitioners of all ages.

In order to get the correct birth time, people in ancient China thought that the sundial was the most accurate measurement during the day. When the clock time is the artificial average time and the regional standard, it is necessary to calculate the "apparent solar time difference" according to the solar terms (ecliptic) and the "local longitude time difference" according to the place of birth, so as to get the real astronomical birth time.

In the almanac, there are basically annual and daily branches, while monthly and hourly branches can be calculated according to the annual and daily branches.

Extended data

The five elements refer to five directions: east, south, west, north and middle. The five elements and the heavenly stems and earthly branches they represent all have their own directions. That is, the Oriental Lord A, B, Yin and Mao Zhimu; The southern main fire at C, D, Thursday and noon; The gold of western masters Geng, Xin, Shen and You; The water lords in the north, decyl, hai and zi; China focuses on Wu, Ji, Chen, Xu, Ugly and Unforeseen.

Constellation, or date of birth, is a person's date of birth. Annual stems and branches form annual columns, monthly stems and branches form monthly columns, daily stems and branches form daily columns, and seasonal stems and branches form hourly columns; A total of four pillars, four stems and four branches, a total of eight words, so it is also called four pillars and eight characters.

Eight-character numerology is a kind of knowledge that infers people's career, marriage, wealth, study, health and other things according to the theories of trunk and branch calendar, yin and yang and five elements. Also called Fan Fortune-telling, it is a fortune-telling method with a long history in China.

In the application, the annual column or the moon column is the main life, but most of them are based on the daily stem of the daily column. The annual stem represents ancestors, the monthly stem represents parents, and the daily branch represents oneself and brothers and sisters (I am male, and the daily stem represents brothers and sisters; I am a woman, my sister and brother, and I am the heir. Also take the life palace, fetus, Universiade, Universiade, and fleeting time, and cooperate with the five elements of old age and moon order to restrain blame.