As long as we recognize the concept of time, it is not difficult to understand "why does everyone have a birthday, year, month, day and hour?" The moment a person is born, there is a time record of the year, month and day. This record is the basis of birth date in numerology. As early as ancient times, there were many differences between China people and the development of western culture. The China calendar holds that the earth does not move, and the moon revolves around the earth for one month, taking two hours as one hour. The year, month, day and time are marked by the arrangement and combination of heavenly stems and earthly branches. Before the western calendar centered on the sun was introduced into China, China has been providing calendars to the public by combining yin and yang. This facilitates the inherent habits of China people and adapts to the expression of international time.
When a person is asked about the date of birth, we usually naturally say that our date of birth (for example, today was born at 10:20) is: 20 18 February 18 February10: 20; The time sequence of using heavenly stems and earthly branches is: Bing Shennian Geng Yinyue Geng Wuri Xin Shisi. How old is this man? Answer: Bing Shen; On the moon: Geng Yin; Day: Geng Wu; Time (hours): Xin Si. By analogy, it forms a figure of eight.