$count = 0;
$starthour = 17;

foreach $time (@times) {
        $count ++;
        ($hour,$minute,$second) = split(/:/,$time`);
        if ($hour >= $starthour) {
                $time += Date_to_Time(1970,1,1,$hour,$minute,$second);
        }
        else {
                $time += Date_to_Time(1970,1,2,$hour,$minute,$second);
        }
}

$timeavg = $time/$count;
print strftime '%H:%M:%S', gmtime($timeavg);