The bottom 
line is that the date DATEDIF method is a safer and easier possibility when the aim is to report age in entire years. Note start and finish dates remain the identical in all three DATEDIFs; solely the unit is modified. This formulation will return Michael Chang’s age on January 1, 2022, which is 20.
Carbon-14 is radioactive, with a half-life of about 5,700 years. Thus the general sample, that males are older—and solely considerably older—seems to stand, making age-gap relationships unusual. The “ideal” three-ish-year age hole with males older than women, noticed cross-culturally, may replicate its optimum selective health.