moving client calculation to server for some browser does not support getWeekDay

UserJob.php

         if ($this->db->last_error == ""){
             $response['status'] = 'success';
             foreach( $jobs as $s){
-                $response['jobs'][] = array(
+                $el = array(
                     'id' => $s->id,
                     'tos' => $s->tos,
                     'start'=> $s->start,
                     'rate_str'=> $this->get_rate_str($s->rate),
                     'tos_str'=> $this->get_tos_str($s->tos),
                     'staff_name' => $this->get_display_name($s->staff),
+                    //extra field for GUI
+                    'hl_start_date' => $this->get_date_month($s->start),
+                    'hl_start' => $this->get_hh_mm($s->start),
+                    'hl_finish' => $this->get_hh_mm($s->finish),
+                    'rated'  => ($s->rating >=1 && $s->rating<=5)? 'rated': '',
+                    'start_day' => $this->get_weekday_name($s->start),
+                    'finish_day' => $this->get_weekday_name($s->finish),
                 );
+                $el['checked_' . $s->rating] = 'checked';
+                $response['jobs'][]=$el;
             }
             
         }else{
         }
         return $response;
     }
+    private function get_date_month($strdate){
+        $d =  new \DateTime($strdate);
+        return $d->format('d/n');
+    }
+    
+    private function get_hh_mm($strdate){
+        $d =  new \DateTime($strdate);
+        return $d->format('H:i');
+    }
+
+    private function get_weekday_name($strdate){
+        $d =  new \DateTime($strdate);
+        return $d->format("D");
+    }
     
     private function get_rate_str($earnings_rate_id)
     {

js/feedback_card.js

                 finish: get_finish_date(),
             }, function(response,  status, xhr){
             	if (response.status == "success"){
-            		pre_process(response);
+            		//pre_process(response);
             		load_client_jobs(response);
             	}else{
             		display_error(response);
         	$.each(response.jobs, function(idx, val){
 
         		val.hl_start_date = get_hl_start_date(val.start);
-        		val.hl_start = get_hl_start(val.start);
-        		val.hl_finish = get_hl_finish(val.finish);
+        		val.hl_start = get_hh_mm(val.start);
+        		val.hl_finish = get_hh_mm(val.finish);
         		
         		val.checked_1 = get_checked(1, val.rating);
         		val.checked_2 = get_checked(2, val.rating);
         	m =  s.getMonth() + 1;
         	return dd +"/" + m;
         }
-        function get_hl_start(start)
-        {
-        	return get_hh_mm(start);
-        }
-        function get_hl_finish(finish)
-        {
-        	return get_hh_mm(finish);
-        }
+
         function get_hh_mm(date){
         	var s = new Date(date);
         	var hh = s.getHours();