Dutch word geboortedatum comes from Dutch geboorte (Birth.), Dutch datum (Date (point in time). Datum (piece of information).)

Detailed word origin of geboortedatum

Dictionary entry	Language	Definition
geboorte	Dutch (nld)	Birth.
datum	Dutch (nld)	Date (point in time). Datum (piece of information).
geboortedatum	Dutch (nld)	Date of birth.