diff --git a/app/views/calendar/single/month.php b/app/views/calendar/single/month.php
index 2b02036677dbfdb717dfde9b0c98090ceadc7cfd..48cf2e5a178f8aa89c915c70040e55b41f5d0325 100644
--- a/app/views/calendar/single/month.php
+++ b/app/views/calendar/single/month.php
@@ -75,7 +75,7 @@
                 <? endif; ?>
                 <? foreach ($calendars[$j]->events as $event) : ?>
                     <div data-tooltip>
-                        <a data-dialog="size=auto" title="<?= _('Termin bearbeiten') ?>" class="inday <?= $event instanceof CourseEvent ? 'calendar-course-event-text' : 'calendar-event-text' ?><?= $event->getCategory() ?>" href="<?= $controller->url_for('calendar/single/edit/' . $event->range_id . '/' . $event->event_id, ['atime' => $event->getStart()]) ?>"><?= htmlReady($event->getTitle()) ?></a>
+                        <a data-dialog="size=auto" title="<?= _('Termin bearbeiten') ?>" class="inday <?= $event instanceof CourseEvent ? 'calendar-course-event-text' : 'calendar-event-text' ?><?= $event->getCategory() ?>" href="<?= $controller->url_for('calendar/single/edit/' . $calendars[$j]->getRangeId() . '/' . $event->event_id, ['atime' => $event->getStart()]) ?>"><?= htmlReady($event->getTitle()) ?></a>
                         <?= $this->render_partial('calendar/single/_tooltip', ['event' => $event, 'calendar' => $calendars[$j]]) ?>
                     </div>
                 <? endforeach; ?>
@@ -98,7 +98,7 @@
                 <? endif; ?>
                 <? foreach ($calendars[$j]->events as $event) : ?>
                     <div data-tooltip>
-                        <a data-dialog="size=auto" title="<?= _('Termin bearbeiten') ?>" class="inday <?= $event instanceof CourseEvent ? 'calendar-course-event-text' : 'calendar-event-text' ?><?= $event->getCategory() ?>" href="<?= $controller->url_for('calendar/single/edit/' . $event->range_id . '/' . $event->event_id, ['atime' => $event->getStart()]) ?>"><?= htmlReady($event->getTitle()) ?></a>
+                        <a data-dialog="size=auto" title="<?= _('Termin bearbeiten') ?>" class="inday <?= $event instanceof CourseEvent ? 'calendar-course-event-text' : 'calendar-event-text' ?><?= $event->getCategory() ?>" href="<?= $controller->url_for('calendar/single/edit/' . $calendars[$j]->getRangeId() . '/' . $event->event_id, ['atime' => $event->getStart()]) ?>"><?= htmlReady($event->getTitle()) ?></a>
                         <?= $this->render_partial('calendar/single/_tooltip', ['event' => $event, 'calendar' => $calendars[$j]]) ?>
                     </div>
                 <? endforeach; ?>