$z = date('Y-m'); $a = date('Y-m', strtotime('-12 months')); $begin = new DateTime($a); $end = new DateTime($z); $end = $end->modify('+1 month'); $interval = new DateInterval('P1M'); $daterange = new DatePeriod($begin, $interval ,$end); foreach($daterange as $date){ echo $date->format("Y-m") . "<br />"; }