use strict;
use warnings;

use Date::Calc qw/check_date/;

check_this("28-02-2007");
check_this("31-02-2007");


sub check_this {
    my ($date) = @_;
    if ($date !~ /^(\d+)-(\d+)-(\d+)$/) {
        printf "Invalid date '$date'\n";
        return;
    }
    my ($day, $mon, $yr) = ($1, $2, $3);
    my $result = check_date($yr, $mon, $day);
    printf "Result for '$date' => %s\n", $result? "Okay": "Bad";
}