diff --git a/app/Controller/Calendar.php b/app/Controller/Calendar.php
index 2a11edab4..6cfa2bada 100644
--- a/app/Controller/Calendar.php
+++ b/app/Controller/Calendar.php
@@ -98,7 +98,7 @@ class Calendar extends Base
 
             $this->taskModification->update(array(
                 'id' => $values['task_id'],
-                'date_due' => $values['date_due'],
+                'date_due' => substr($values['date_due'], 0, 10),
             ));
         }
     }