diff --git a/public/typo3conf/ext/ep_products/Classes/Controller/AjaxDateController.php b/public/typo3conf/ext/ep_products/Classes/Controller/AjaxDateController.php
index ac225e3f..c10e0df0 100644
--- a/public/typo3conf/ext/ep_products/Classes/Controller/AjaxDateController.php
+++ b/public/typo3conf/ext/ep_products/Classes/Controller/AjaxDateController.php
@@ -91,6 +91,18 @@ class AjaxDateController extends ActionController
         $this->processFilterSettingsArgument($forcedConceptUids);
     }
 
+    public function initializeDatesAction()
+    {
+        if ($this->request->hasArgument('dateFrom')) {
+            $dateFrom = $this->request->getArgument('dateFrom');
+            $this->request->setArgument('dateFrom', $dateFrom === '' ? null : $dateFrom);
+        }
+        if ($this->request->hasArgument('dateTo')) {
+            $dateTo = $this->request->getArgument('dateTo');
+            $this->request->setArgument('dateTo', $dateTo === '' ? null : $dateTo);
+        }
+    }
+
     /**
      * @param Product $product
      * @param Hotel $hotel