What is heavenly stems and earthly branches, a birthday. How to query the corresponding five elements? Method ~ ~

Heavenly stems and earthly branches is a great creation of working people in ancient China, which is used to record the years, months and days. Tiangan has ten words: A, B, C, D, E, Ji, G, Xin, E and G. There are only twelve words in the earthly branch: Zi, Ugly, Yin, Mao, Chen, Si, Wu, Wei, Shen, You, Xu and Hai. Paired from Jiazi to Guihai, with a total of 60 groups of reciprocating cycles. The date of birth is the year, month, day and hour when a person is born. The query method first needs to find the perpetual calendar with the date of birth and find the date of birth. The date of birth is based on the date of birth and the actual date of birth. The ancient time is now two hours. Generally, there are calculation methods of perpetual calendar or yellow calendar.