se strict;
use warnings;
use Data::Dumper;
use POSIX qw(strftime);
use Date::Calc qw( Today Add_Delta_Days );

# get todays date:::
my $today = sprintf "%04d%02d%02d", Today();

my $month_ago_1 =  strftime("%Y%m%d",localtime(time() - 720*60*60));
my $month_ago_2 = sprintf "%04d/%02d/%02d",Add_Delta_Days( Today(), -30 );

print "\n Today = $today\n\n";

print "$month_ago_1 - $month_ago_1\n";

my @date = localtime;
$date[3] -= 4 * 7;
my $month_ago = sprintf "%04d%02d%02d", @date;
print "\n $month_ago\n";

my $month_ago_3  = strftime('%Y-%m-%d', localtime(time - 4 * 7 * 86400));
print "\n $month_ago_3\n";

exit;