What is the knowledge about birthdays?

The common sense of birth and birth is actually another way of saying the four pillars of Zhouyi. Four pillars refer to the year, month, day and time of birth. People use "heavenly stem" and "earthly branch" to represent year, month, day and time respectively. There are two words in each column and eight characters in four columns, so fortune telling is also called "measuring eight characters" According to the relationship between yin and yang attributes and the five elements of heaven and earth, it is inferred that human body is responsible and blessed. However, what I want to talk about here is not how to "measure eight characters", but how to calculate eight characters. The four columns are arranged in a figure of eight, which refers to the year, month, day and time when a person was born. Four-column arrangement refers to finding a person's date of birth. It is mainly divided into four steps. The chronological column, that is, the year when a person was born, is represented by dry branches. Note that the dividing line between last year and next year is based on the holiday time in beginning of spring, not the first day of the first month. Chronological column, that is, the main branch indicates the festival when a person is born. Note that the main branch is not based on the first day of each lunar month, but on the festival of last month. After the festival, it will be the festival next month. January, silver moon, February, Uzuki, March, Chen Yue, April, Mitsuki, from beginning of spring to Jing Zhi, from Qingming to Long Summer, from Long Summer to May, afternoon, June, moonless, July, Shen Yue, August, Youyue, from Mang Zi to Xiao Shu, from beginning of autumn to beginning of autumn, from Bailu to Bailu, from September. Beginning of winter to heavy snow, from heavy snow to slight cold, from slight cold to beginning of spring moral: In the first month, beginning of spring: "Li" means the beginning, which means that the spring of everything's recovery has begun again. The warmer weather and the renewal of everything are the signs of the beginning of farming activities. February 4th or 5th of the solar calendar is the beginning of spring. February fright: Spring thunder began to roar, awakening insects and small animals that were dormant and hibernating in the soil, and winter eggs were about to hatch. This solar term means that spring is getting stronger and the temperature is rising. Surprised to see the Gregorian calendar on March 6 or 7. Qingming in March: This solar term means that the temperature is getting warmer, plants are sprouting, and a beautiful and clear scene appears in nature. Qingming is April 5 or 6 in the solar calendar. Long summer in April: This solar term means that summer begins and hot weather is coming. Agricultural activities have entered a busy summer. Long summer falls on May 6th or 7th of the Gregorian calendar. May awn seed: "awn" refers to the fine hair at the tip of the shell. In the north, this is also the busiest season for harvesting wheat and planting rice. The awn is planted on June 6 or 7 of the Gregorian calendar. Summer heat in June: this solar term means that it has entered summer, and the heat is pressing. Summer is July 7th or 8th in the solar calendar. Beginning of autumn in July: This solar term means that the hot summer will pass and the crisp autumn will begin. Beginning of autumn is on August 8th or 9th of the Gregorian calendar. August dew: This solar term means that the weather is cold, and the water vapor in the air often condenses into white dew on vegetation and other objects at night. The white dew is September 8 or 9 of the Gregorian calendar. Cold dew in September: This solar term means the beginning of winter. It indicates that the cold degree of the climate will gradually increase, and the cold dew is 10 Gregorian calendar1October 8 or 9. Beginning of winter in October: This solar term means that the crisp autumn has passed and the cold winter has begun. Gregorian calendar1October 7th or 8th is beginning of winter. 1 1 heavy snow: this solar term means heavy snow. The heavy snow occurred on February 7 or 8 of the Gregorian calendar. 1February slight cold: This solar term indicates the beginning of the coldest season in winter, with frost, and slight cold falls on the 5th or 6th of the Gregorian calendar1October. The following is a monthly table from the beginning of the year. Month/year: A, B, G, C, D, N, E, D, D, D, D, D, D, D, D, D, D, D, D, D, D.