What calculation method is used to calculate the sun column in the date of birth?

The specific formula is as follows: [Three digits after the year are multiplied by 5+ three digits after the year divided by 4+9+ solar calendar days+month (0) bimonthly (30)+ monthly adjustment ]/60 = the remaining digits are taken as heavenly stems, and the remaining digits are divided by 12 to take earthly branches.

Monthly adjustment number (1 is one, four and five), (2 is two, six and seven), (0 is three) (3 is eight), (4 is nine and ten) and (5 is eleven and twelve).

However, in leap years, that is, January and February, 1 must be subtracted to calculate the number of branches.

Example: 1999 April16 (99× 5+99 ÷ 4+9+16+30+1) ÷ 60 = 9+35, corresponding to "one hundred days".

If it exceeds 2000, use 100 as the multiplier. For example, 20 14, with 1 14 as the multiplier.