How to write birthday?

According to the date of birth, check the perpetual calendar, or find the fortune-telling website on the Internet to automatically arrange the life chart. You can leave the hospital. The eight characters are composed of heavenly stems and earthly branches. Tiangan 10 branch, Dizhi 12 branch, with Yang Yang and Yin and Yang. For example, this year is the year of Geng Yin, now is the month of Wuzi, and today is Ding Youri, which is six characters. If you set a time, for example, after twelve o'clock in the morning, it is the time of Gengzi, so it is written as: Gengyin, Wuzi, Ding You and Gengzi, which are eight characters, commonly known as eight characters. If someone was born at this time, this is his date of birth.