The date on which a Person was born.
How to record
It may be necessary to use more than one unit of information to describe this date, eg a range of dates or a textual expression of the date as well as the means by which the date was established. Descriptions of these units of information are gathered together under the Date heading. Use Date – period to record non-numeric dates and eras relating to the Person‘s birth.
As for Date.
Record once only for a Person.