Heavenly stems and earthly branches five lines of gossip formula is mainly how to calculate?

1, ten days' work, twelve earthly branches, these 22 words are actually recited in order: A, B, C, D, E, G, Xin, Ren, Gui, Zi Chou Tatsumi Xu Hai at noon, you can remember it after reading it a few times.

2. The formula for calculating the year after A.D. is: "The number of A.D. years is reduced by three, divided by 10, and the remainder is heavenly stems, and the radix is divided by 12, and the remainder is the year of earthly support".

3. The earthly branch of the month is fixed, such as the first day of the first month, which is only counted as the month.

4. The daily stem base of1900 ——1999 = (double digits at the end of the year +3)*5+55+ (double digits at the end of the year-1).

5, dry branch time = daily dry ordinal number *2+ daily dry ordinal number -2 five.