if today we are 09/16/2016, I would like to be able from the same day last year to get the Friday of the week
for that example, i woud like to return 09/18/2015
if I chose 09/09/2016 i would need to return 09/11/2015
the user will always chose a date that is a friday. 09/16/2016 is a friday and 09/09/2016 as well.
i need to return the friday's date of last year
can you help me ?