load(
  local!dob: date(1983,7,19),
  with(
    local!ageYears: if(
      month(today())>month(local!dob),
      year(today())-year(local!dob),
      if(
        month(today())<month(local!dob),
        year(today())-year(local!dob)-1,
        if(
          day(today())>=day(local!dob),
          year(today())-year(local!dob),
          year(today())-year(local!dob)-1
        )
      )
    ),
    local!ageMonths: if(
      and(
        day(today())>=day(local!dob),
        month(today())>=month(local!dob)
      ),
      month(today())-month(local!dob),
      if(
        and(
          day(today())>=day(local!dob),
          month(today())<month(local!dob)
        ),
        12+(month(today())-month(local!dob)),
        if(
          and(
            day(today())<day(local!dob),
            month(today())<=month(local!dob)
          ),
          11+(month(today())-month(local!dob)),
          month(today())-month(local!dob)-1
        )
      )
    ),
    local!ageDays: if(
      and(
        day(today())>=day(local!dob),
        month(today())>=month(local!dob)
      ),
      day(today())-day(local!dob),
      if(
        and(
          day(today())>=day(local!dob),
          month(today())<month(local!dob)
        ),
        day(today())-day(local!dob),
        if(
          and(
            day(today())<day(local!dob),
            month(today())<=month(local!dob)
          ),
          (day(eomonth(date(year(today()),month(today())-1,1),0))-day(local!dob))+day(today()),
          (day(eomonth(date(year(today()),month(today())-1,1),0))-day(local!dob))+day(today())
        )
      )
    ),
    a!dateField(
      label: "Date of Birth",
      value: local!dob,
      saveInto: local!dob,
      instructions: "Age: " & local!ageYears & " year(s) " & local!ageMonths & " month(s) " & local!ageDays & " day(s)"
    )
  )
)