diff --git a/common/modules/event/manager/EventManager.php b/common/modules/event/manager/EventManager.php
index 7e40a81..38ed3b6 100644
--- a/common/modules/event/manager/EventManager.php
+++ b/common/modules/event/manager/EventManager.php
@@ -75,11 +75,13 @@ class EventManager
 
         if ( $activeOrDisplayInterval == "active"){
             $dateTimeFrom = $interval->firstActiveDate;
-            $dateTimeTo = (clone $interval->lastActiveDate)->modify('+1 day');
+            $to = clone $interval->lastActiveDate;
+            $dateTimeTo = $to->modify('+1 day');
         }else{
             // active
             $dateTimeFrom = $interval->firstDisplayDate;
-            $dateTimeTo = (clone $interval->lastDisplayDate)->modify('+1 day');
+            $to = clone $interval->lastDisplayDate;
+            $dateTimeTo = $to->modify('+1 day');
         }
         // get events between active dates