use Date::Calc qw(check_date check_time);

our $DEBUG = 1; # set to 0 to disable

print "woohoo!\n" if valid( ['033103','12:59'] ); # March 31, 2003 12:59 valid
print "w00t!\n" if valid( ['022803','13:00'] );      # February 28, 2003 13:00 valid
print "Yippee!\n" if valid( ['023103','08:40'] ); # February 31, 2003 8:40 invalid

sub valid {
	my $ref = shift;
	my $date = shift @$ref;
	my $time = shift @$ref;
	die "Invalid date format $date" unless $date =~ /(\d\d)(\d\d)(\d\d)/;
	my ($month, $day, $year) = ($1, $2, $3);
    $year += ($year <= 69) ? 2000 : 1900;
    die "Invalid date $date" unless (check_date($year,$month,$day));
	die "Invalid time format $time" unless $time =~ /(\d\d):(\d\d)/;
	my ($hour, $minute) = ($1, $2);
    die "Invalid time $time" unless (check_time($hour,$min,$sec));
	print "$date $time is valid.\n" if $DEBUG;
	return 1;
}