diff --git a/application/views/mobile_first/htravel-structured-data-article.php b/application/views/mobile_first/htravel-structured-data-article.php
index 6c193666..a0bcfeb1 100644
--- a/application/views/mobile_first/htravel-structured-data-article.php
+++ b/application/views/mobile_first/htravel-structured-data-article.php
@@ -8,8 +8,8 @@
   },
   "headline": "<?php echo $information->ic_seo_title; ?>",
   "image": <?php echo $article_image_urls; ?>,
-  "datePublished": "<?php echo $article_published_date; ?>",
-  "dateModified": "<?php echo $article_modified_date; ?>",
+  "datePublished": "<?php echo $article_published_date->format('c'); ?>",
+  "dateModified": "<?php echo $article_modified_date->format('c'); ?>",
   "author": {
     "@type": "Person",
     "name": "<?php echo $author_name; ?>",