19900727 What is the life of a fortune teller _ 19900707?

If we use the serial numbers of Tiangan A, B, ... nonyl and decyl as 0, ..., 8 and 9;

Children, ugly, ..., jealousy and earthly branches of Hai are also numbered with 0, 1, ..., 10, 1 1 and so on.

So:

Calculate the Gregorian calendar year of the stem and branch from the known Gregorian calendar year: the number of years is reduced by 4, the remainder is divided by 10 for the heavenly stem, and the remainder is divided by 12 for the earthly branch. For example:

(1972-4) mod 10 ≡ 8, so Tiangan is a "nonyl";

(1972-4) mod 12 ≡ 0, so the earthly branch is a "child".

Given this formula, you should be able to work it out. I hope it helps you.