Data of birth or age in completed years: Column number (6) Record the date of the person's birth relying on his birth certificate or his identification card or any formal document of the responder. If the date of birth is not available, record the age of the person in completed years and neglecting the months even if they are (11) months.
If the age is less than one year write (months) and if the age is less than one month write (days)