What is the principle of birthday fortune telling?

How to calculate the date and birthday?

To calculate the date of birth, you need to know the exact date of birth, month, day, hour, minute and even the latitude and longitude of the place of birth. Before the sixties and seventies, it was necessary to understand the principle of arranging eight characters and use the reference book of perpetual calendar to calculate the date of birth. With the development of modern high technology, it is very simple to calculate the date of birth. As long as you know the relevant information about your birth, you can quickly and accurately calculate the date of birth by using the professional eight-character typesetting tool of computer or mobile phone. For example, a man was born at 20: 30 pm on April 1955 and was born in xiuying district, Haikou City, Hainan Province. The date of birth calculated by the online eight-character arrangement system on the Internet is: B, E, C, C.