diff --git a/Classes/Domain/Model/Frontend/OpeningHour.php b/Classes/Domain/Model/Frontend/OpeningHour.php
index 263318c..864648a 100644
--- a/Classes/Domain/Model/Frontend/OpeningHour.php
+++ b/Classes/Domain/Model/Frontend/OpeningHour.php
@@ -71,12 +71,12 @@ class OpeningHour
     {
         $from = null;
         if (isset($rawData['from'])) {
-            $timeZone = new \DateTimeZone($rawData['from']['timezone']);
+            $timeZone = new \DateTimeZone($rawData['from']['timezone'] ?? 'Europe/Berlin');
             $from = new \DateTimeImmutable($rawData['from']['date'], $timeZone);
         }
         $through = null;
         if (isset($rawData['through'])) {
-            $timeZone = new \DateTimeZone($rawData['through']['timezone']);
+            $timeZone = new \DateTimeZone($rawData['through']['timezone'] ?? 'Europe/Berlin');
             $through = new \DateTimeImmutable($rawData['through']['date'], $timeZone);
         }