only in patch2:
unchanged:
--- a/core/modules/rdf/rdf.module
+++ b/core/modules/rdf/rdf.module
@@ -323,7 +323,7 @@ function rdf_preprocess_node(&$variables) {
 
   // Adds RDFa markup for the date.
   $created_mapping = $mapping->getPreparedFieldMapping('created');
-  if (!empty($created_mapping) && $variables['display_submitted']) {
+  if (!empty($created_mapping)) {
     $date_attributes = rdf_rdfa_attributes($created_mapping, $variables['node']->get('created')->first()->toArray());
     $rdf_metadata = array(
       '#theme' => 'rdf_metadata',