Hi,
you can make a new Field (Number), Auto entered calculation, Calc: Year(Get(CurrentDate))-Year ( anniversaryDate )
If it works, send me the payment please :)
I just saw the attachment, so change the calculatedDate tu calculation field, copy/paste: Year(Get(CurrentDate))-Year ( anniversaryDate )
let it calculate the values, and change it back to auto entered calculation.
Kind regards,
Csaba Kasler