Task

Write a program or a script that returns the date of the last Fridays of each month of a given year.

The year may be given through any simple input method in your language (command line, std in, etc).



Example of an expected output:

./last_fridays 2012
2012-01-27
2012-02-24
2012-03-30
2012-04-27
2012-05-25
2012-06-29
2012-07-27
2012-08-31
2012-09-28
2012-10-26
2012-11-30
2012-12-28



Related tasks
 Five weekends
 Day of the week
 Find the last Sunday of each month


#!/usr/bin/perl -w
use strict ;
use DateTime ;
use feature qw( say ) ;
 
foreach my $month ( 1..12 ) {
   my $dt = DateTime->last_day_of_month( year => $ARGV[ 0 ] , month => $month ) ;
   while ( $dt->day_of_week != 5 ) {
      $dt->subtract( days => 1 ) ;
   }
   say $dt->ymd ;
}