my $age = (stat $remote)[9];
my $cutoff = time - 86400 * 7; # now less 7 days
if( $age < $cutoff ) {
  # file is older
}

##</code><code>##

my $dirname = sub {
    sprintf '%02d%02d%02d%02d%02d%02d', $_[0] % 100, @_[1..5]
  }->((localtime)[5,4,3,2,1,0]);