Template:AgeFull

Copied from Wikipedia's For year month day template. The three parameters are "year", "month", and "day", all optional. Here's what happens if you supply a specific date:

"Oni is {{AgeFull|year=2001|month=1|day=28}} old"
yields
Oni is 24 years and 19 days old

whereas "Oni is {{AgeFull|year=2001|month=1}} old"
yields
Oni is 24 years and 0 or 1 month old

and "Oni is {{AgeFull|year=2001}} old"
yields
Oni is 23 or 24 years old

If you're content with just getting an age in whole years and you don't want the equivocating ("this or that"), use the simpler template Template:Age.