diff --git a/index.php b/index.php
index 8fd1900..0b25761 100644
--- a/index.php
+++ b/index.php
@@ -33,14 +33,16 @@ $filter = filter_input(INPUT_GET, 'filter', FILTER_SANITIZE_SPECIAL_CHARS); // F
 $events = $ical->sortEventsWithOrder($ical->eventsFromInterval($period_val . ' month'));
 $result = [];
 
+$timeZone = new DateTimeZone('Europe/Berlin');
+
 foreach ($events as $event) {
     $cat = $event->categories ?? '';
 
     if ($filter && stripos($cat, $filter) === false) continue;
     if (stripos($cat, "hidden") !== false) continue;
 
-    $start = new DateTime($event->dtstart);
-    $end = new DateTime($event->dtend);
+    $start = new DateTime($event->dtstart, $timeZone);
+    $end = new DateTime($event->dtend, $timeZone);
     $uid = $event->uid;
 
     $interval = new DateInterval('P1D');