diff --git a/app/Helpers/CommonHelper.php b/app/Helpers/CommonHelper.php
index 9f10b5f..81cf1f8 100644
--- a/app/Helpers/CommonHelper.php
+++ b/app/Helpers/CommonHelper.php
@@ -182,11 +182,6 @@ abstract class CommonHelper
       case 'history':
         $value = $value != null ? html_entity_decode($value, ENT_QUOTES, 'UTF-8') : "";
         break;
-      case 'issue_at':
-      case 'expired_at':
-      case 'billing_at':
-      case 'start_at':
-      case 'end_at':
       case 'updated_at':
       case 'created_at':
       case 'deleted_at':