diff --git a/src/lib/Templating/Twig/DateTimeExtension.php b/src/lib/Templating/Twig/DateTimeExtension.php
index 1925b08..67e43ae 100644
--- a/src/lib/Templating/Twig/DateTimeExtension.php
+++ b/src/lib/Templating/Twig/DateTimeExtension.php
@@ -81,17 +81,21 @@ public function getFilters(): array
     }
 
     /**
-     * @param \DateTimeInterface|null $date
+     * @param mixed $date
      * @param \EzSystems\EzPlatformUser\UserSetting\DateTimeFormat\FormatterInterface  $formatter
      *
      * @return string
      */
-    public function format(?DateTimeInterface $date = null, FormatterInterface $formatter): string
+    public function format($date = null, FormatterInterface $formatter): string
     {
         if ($date === null) {
             $date = new DateTimeImmutable();
         }
 
+        if(is_int($date)) {
+            $date = new DateTimeImmutable('@'.$date);
+        }
+
         return $formatter->format($date);
     }
 }