diff --git a/app/Controllers/EnquiryController.php b/app/Controllers/EnquiryController.php
index f7420fd..a770d74 100644
--- a/app/Controllers/EnquiryController.php
+++ b/app/Controllers/EnquiryController.php
@@ -95,8 +95,14 @@ class EnquiryController extends ResourceController
 
 
             foreach ($data as $key => $row) {
-                $data[$key]['created_on']  = date('d-m-Y h:i A', strtotime($row['created_on']));
-                $data[$key]['updated_on']  = date('d-m-Y h:i A', strtotime($row['updated_on']));
+                if($row['created_on'] !== null)
+                {
+                    $data[$key]['created_on']  = date('d-m-Y h:i A', strtotime($row['created_on']));
+                }
+                if($row['updated_on'] !== null)
+                {
+                    $data[$key]['updated_on']  = date('d-m-Y h:i A', strtotime($row['updated_on']));
+                }
             }
 
             if (!empty($from_date) || empty(!$to_date)) {