diff --git a/app/controllers/calendar/calendar.php b/app/controllers/calendar/calendar.php
index fd00956bc563b5968bb2afaff07f91a673017e8c..678909477b38a06f8c1e9f53faba2409dc4139c8 100644
--- a/app/controllers/calendar/calendar.php
+++ b/app/controllers/calendar/calendar.php
@@ -614,8 +614,8 @@ class Calendar_CalendarController extends AuthenticatedController
         $result = [];
 
         uasort($users, function(User $a, User $b) {
-            $fullname_a = $a->getFullName();
-            $fullname_b = $b->getFullName();
+            $fullname_a = $a->getFullName('no_title');
+            $fullname_b = $b->getFullName('no_title');
             if ($fullname_a == $fullname_b) {
                 return 0;
             }
@@ -631,7 +631,7 @@ class Calendar_CalendarController extends AuthenticatedController
                         $result[] = $data->toFullcalendarEvent();
                     } else {
                         //Prevent duplicate entries:
-                        $data->title = $user->getFullName();
+                        $data->title = $user->getFullName('no_title');
                         if (array_key_exists($event->calendar_date_id, $result)) {
                             $result[$event->calendar_date_id]['title'] .= ', ' . $data->title;
                         } else {