What about heavenly stems and earthly branches? Is there a formula?

How many days is the nth solar term in a year (starting from 0 slight cold)?

Function sTerm(y, n) {

Var offDate = new date ((31556925974.7 * (y-1900)+terminfo [n] * 60000)+date. UTC( 1900，0，6，2，5))

return(offDate.getUTCDate())

For example, check the trunk and branch days of April 1 day, 2006. Substitute the numerical value into the calculation formula.

g = 4 * 20+[20/4]+5 * 06+[06/4]+[3 *(4+ 1)/5]+ 1-3 = 197

z = 8 * 20+[20/4]+5 * 06+[06/4]+[3 *(4+ 1)/5]+ 1+7+6 = 2 13

Where c is the number of centuries minus one, y is the last two digits of the year, m is the month and d is the number of days. 65438+ 10 and February are calculated according to 65438+March and 65438+April of the previous year. Odd months i=0 and even months i=6. The remainder of g divided by 10 is heavenly stems, and the remainder of z divided by 12 is earthly branches.

When calculating, the number with [] indicates rounding.