I am working with the Full Genealogy Template. I am modifying it to an extent (Foreign Key name change, different naming conventions, etc.) I am importing data from the LDS  Database. (A project for my niece.) With persons born in the 1400 - 1800 time period, all there is most of the time, is a birth year and a death year (if that.) Is it possible to auto calculate age, without jumping through hoops, splitting strings, etc. using the invalid dates: 0/0/1723 and 0/0/1769 as an example, entered simply as 1723 and 1769 as LifeEventDate in the LifeEventF, (or as 0/0/1723,)  then reflected in the PersonF Age, Born/Died fields. Just looking at it; one can see that the age is about 45 -- 46. But when dealing with several hundred of the same, well., even very verbose code would be better, and I have some ideas. (In the process a label is made visible "Age is approximate," triggered by validation logic, in a separate function etc.) The fields on the form are formatted mm/dd/yyyy. Calculations are by the functions as you have written them. (except the foreign key name change.) Hopefully this is clear enough. Thanks