Years
IIf([DOB] Is Null,"",DateDiff("yyyy",[DOB],Date())-IIf(Format([DOB],"mmdd")>Format(Date(),"mmdd"),1,0))
Months
IIf([DOB] Is Null,"",IIf(Day([DOB])<=Day(Date()),DateDiff("m",[DOB],Date())-[Years]*12,DateDiff("m",[DOB],Date())-[Years]*12-1))
Days
IIf([DOB] Is...