Is the date on which a person was born or is officially deemed to have been born. In cases, where despite best efforts PerspnBirthDate is not known, but the age is known; then the birth date should be assumed to be on the 1st of January of the current year, minus the age of the person Example | A patient arrives on January 8th 2008 and Claims he is 64 years old, but does not know his date of birth. The PatientBirthDate should be assumed to be 01/01/1944..

restriction of DateForm