Losing leading zeros in concatenate formula

I have date of birth data in columns ABC, with A and B formatted to show leading zeros.

Used the following formula to combine data into column D in a required format:
=A2&"/"&B2&"/"&"19"&C2

PROBLEM: the leading zeros in A and B are not showing up in the formula in Column D. Any solutions?

Try

=TEXT(A2,"00")&"/"&TEXT(B2,"00")&"/"&"19"&TEXT(C2,"00")

or

=TEXT(DATE(C2,B2,A2),"dd/mm/yyyy")

Great, thanks!