On the starting time of the eight-character fleeting time

When calculating the time of each fleeting year, it is necessary to check the perpetual calendar according to the date of birth (year, month, day and hour) to get the heavenly stems and earthly branches of the date of birth (it should be noted that beginning of spring is the beginning of the new year in terms of nomenclature, and some perpetual calendars may start from the Spring Festival, which may be inconsistent, so beginning of spring shall prevail). Then according to the 1 branch of the birthday, and according to the table 1, find out the branch corresponding to the time.