How to calculate a person's birthday?

Son; Zǐ (at night 1 1 in the morning 1) rats are most active at this time. (Say 0: 00 ~ 2: 00, and so on) Ugly: chǒu (from 0 am to 3 am in 65438+) Niu Niu chews undigested food during the day at this time. Yin (3: 00 am to 5: 00 am) is the most fierce at this time. (From 7: 00 a.m. to 9: 00 a.m.) Chen: Chen (from 7:00 a.m. to 9: 00 a.m.) According to the legend of dragons, it's time for "the dragon is going to rain": Si (from 9:00 a.m. to 1 1: 00 a.m.) The snake is hiding in the grass at this time: w (.

Wei: wèi (1: 00 to 3: 00 p.m.) Sheep and goats eat grass at this time. Shen: shēn (3: 00 p.m. to 5: 00 p.m.) Monkeys and monkeys like to crow at this time. yǒu (5: 00 p.m. to 7: 00 p.m.) Chickens and chickens start to return to their nests at night. 9: 00 to 1 1 is the second shift, 1 is the third shift,1is the fourth shift, and 3: 00 pm is the fifth shift. Note: "gēng" here is pronounced as "Jē ng" in ancient Chinese.