Let cell A1 contain the text 20020415 .
=CONCATENATE(RIGHT(A1, 2), ".", MID(A1,5,2), ".", LEFT(A1, 4))
will create 04/15/2002 .
Then, if you want to save the value, not the formula, you can copy and paste only that value.
Note. This method still saves the date as text.
source
share