The procedure of birthday matching was the process in which the boy's family asked the matchmaker to go to the girl's family to enquire about her name and date of birth. Then, the boy's parents would send the girl's and their son's names and birthdates to a sorcerer or fortune teller for divining to see if the marriage between the two would be appropriate. The foretelling of the luck of the marriage was what was called "marriage divination".