Deduction algorithm for New Year's Day trunk branch and annual trunk branch

1, the method of finding New Year's Day trunks and branches is: according to this year's New Year's Day trunks and branches, find next year's New Year's Day trunks and branches. If this year is a normal year, add five to the trunk and branches of New Year's Day this year to get the trunk and branches of New Year's Day next year; If this year is a leap year, then this year's New Year's Day expenditure plus 6 is next year's New Year's Day expenditure.

2, the calculation formula of the daily branch of the lunar calendar: the size of the month is remembered in the heart, and the root is rooted. Rush in the same place after the big trunk, and retreat for one day after the small trunk. On the first day of 13 and 25th, the same branch counts as a branch.

"The size of the month is in mind, and the roots are standing." The big moon in the lunar calendar is 30 days and the small moon is 29 days, which is fixed. In order to calculate the daily branch of the lunar calendar, we must first compile the estimated year with two hexagrams according to the formula of the lunar calendar, so as to use it when calculating the daily branch. In addition, you must remember the branches of the first day of the first lunar month, because this is the basis of daily calculation in a year.

"After the big trunk, I rushed in the same place, and after the small trunk, I retired for one day." The trunk of the first day of the big moon is the same as the trunk of the first day of the next month, and the branches touch each other. On the day when the main branch on the first day of abortion is the same as the main branch on the first day of the following month, one day will be retired.

For example, this month is a big month, the first branch of the first day is your own, and the first branch of the next month is your own. If this month is a miscarriage, then the first day of next month should be decided by the first step back, that is, Wushen Day.

"On the first day, 13 and 25th, the same branch counts as one." After determining the first day of a month, these two sentences divide the month into three stages, namely, the first day to the twelfth day, the thirteenth day to the twenty-fourth day and the twenty-fifth day. The first, thirteenth and twenty-fifth days of junior high school are also regular in terms of cadres and branch offices. On the first day of knowing the trunk, you only need to push the trunk once every other day, but the branches remain the same.

Similarly, 13 knows the main branch, and 25 knows the main branch. If the first day is Jiazi, thirteen is Bingzi and twenty-five is Wuzi. If you master this method, you can quickly know what day it is according to which section it belongs to.