Откопал забавный коммент в проекте (-:

        $current_date = 0;
        /*
                // шаманство с датами ... мистическое
                if ($date[$key]['F'] && $date[$key]['d'] && $date[$key]['Y'])
                {
                    $current_date = mktime(0,0,0,$date[$key]['F'],$date[$key]['d'],$date[$key]['Y']);
                }
                elseif ($start_key)
                {
                    $current_date = mktime(0,0,0,$date[($start_key + 3*$i + 1)]['F'],$date[($start_key + 3*$i)]['d'],$date[($start_key + 3*$i + 2)]['Y']);
                    $i++;
                }
                else
                {
                    $current_date = mktime(0,0,0,$date[((3*$key)-2)]['F'],$date[((3*$key)-3)]['d'],$date[((3*$key)-1)]['Y']);
                }
        */
        return $current_date;