diff -u b/core/modules/node/src/NodeViewBuilder.php b/core/modules/node/src/NodeViewBuilder.php
--- b/core/modules/node/src/NodeViewBuilder.php
+++ b/core/modules/node/src/NodeViewBuilder.php
@@ -42,8 +42,8 @@
       if ($display->getComponent('submitted_by') && \Drupal::configFactory()->get('node.type.' . $bundle)->get('display_submitted')) {
         $build[$id]['submitted_by'] = [
           '#theme' => 'node_submitted_by',
-          '#author_name' => drupal_render($build[$id]['uid']),
-          '#date' => drupal_render($build[$id]['created']),
+          '#author_name' => drupal_render_root($build[$id]['uid']),
+          '#date' => drupal_render_root($build[$id]['created']),
           '#author_attributes' => new Attribute(),
         ];
         if (theme_get_setting('features.node_user_picture')) {
diff -u b/core/modules/node/templates/node-submitted-by.html.twig b/core/modules/node/templates/node-submitted-by.html.twig
--- b/core/modules/node/templates/node-submitted-by.html.twig
+++ b/core/modules/node/templates/node-submitted-by.html.twig
@@ -19,7 +19,7 @@
  */
 #}
 {{ author_picture }}
-<div{{ author_attributes }}>
+<div{{ author_attributes.addClass('node__submitted') }}>
     {% trans %}Submitted by {{ author_name }} on {{ date }}{% endtrans %}
     {{ metadata }}
 </div>
only in patch2:
unchanged:
--- a/core/modules/book/config/install/node.type.book.yml
+++ b/core/modules/book/config/install/node.type.book.yml
@@ -10,4 +10,4 @@ description: '<em>Books</em> have a built-in hierarchical navigation. Use for ha
 help: ''
 new_revision: true
 preview_mode: 1
-display_submitted: true
+display_submitted: false
only in patch2:
unchanged:
--- a/core/modules/forum/config/optional/node.type.forum.yml
+++ b/core/modules/forum/config/optional/node.type.forum.yml
@@ -10,4 +10,4 @@ description: 'A <em>forum topic</em> starts a new discussion thread within a for
 help: ''
 new_revision: false
 preview_mode: 1
-display_submitted: true
+display_submitted: false
only in patch2:
unchanged:
--- a/core/modules/node/src/Tests/NodePostSettingsTest.php
+++ b/core/modules/node/src/Tests/NodePostSettingsTest.php
@@ -1,6 +1,7 @@
 <?php
 
 namespace Drupal\node\Tests;
+use Drupal\node\Entity\NodeType;
 
 /**
  * Tests that the post information (submitted by Username on date) text displays
@@ -23,9 +24,9 @@ protected function setUp() {
   function testPagePostInfo() {
 
     // Set "Basic page" content type to display post information.
-    $edit = array();
-    $edit['display_submitted'] = TRUE;
-    $this->drupalPostForm('admin/structure/types/manage/page', $edit, t('Save content type'));
+    $node_type_config = NodeType::load('page');
+    $node_type_config->setDisplaySubmitted(TRUE);
+    $node_type_config->save();
 
     // Create a node.
     $edit = array();
@@ -40,9 +41,9 @@ function testPagePostInfo() {
     $node->delete();
 
     // Set "Basic page" content type to display post information.
-    $edit = array();
-    $edit['display_submitted'] = FALSE;
-    $this->drupalPostForm('admin/structure/types/manage/page', $edit, t('Save content type'));
+    $node_type_config = NodeType::load('page');
+    $node_type_config->setDisplaySubmitted(FALSE);
+    $node_type_config->save();
 
     // Create a node.
     $edit = array();
only in patch2:
unchanged:
--- a/core/modules/node/tests/modules/node_test_config/config/install/node.type.default.yml
+++ b/core/modules/node/tests/modules/node_test_config/config/install/node.type.default.yml
@@ -3,7 +3,7 @@ name: Default
 description: 'Default description.'
 help: ''
 new_revision: true
-display_submitted: true
+display_submitted: false
 preview_mode: 1
 status: true
 langcode: en
only in patch2:
unchanged:
--- a/core/modules/node/tests/modules/node_test_config/sync/node.type.import.yml
+++ b/core/modules/node/tests/modules/node_test_config/sync/node.type.import.yml
@@ -3,7 +3,7 @@ name: Import
 description: 'Import description.'
 help: ''
 new_revision: false
-display_submitted: true
+display_submitted: false
 preview_mode: 1
 status: true
 langcode: en
only in patch2:
unchanged:
--- a/core/modules/options/tests/options_config_install_test/config/install/node.type.options_install_test.yml
+++ b/core/modules/options/tests/options_config_install_test/config/install/node.type.options_install_test.yml
@@ -7,5 +7,5 @@ description: null
 help: null
 new_revision: false
 preview_mode: 1
-display_submitted: true
+display_submitted: false
 third_party_settings: {  }
only in patch2:
unchanged:
--- a/core/modules/simpletest/src/ContentTypeCreationTrait.php
+++ b/core/modules/simpletest/src/ContentTypeCreationTrait.php
@@ -37,6 +37,12 @@ protected function createContentType(array $values = array()) {
       'name' => $id,
     );
     $type = NodeType::create($values);
+
+    // If the display submitted flag is passed, set its value.
+    if (isset($values['display_submitted'])) {
+      $type->setDisplaySubmitted($values['display_submitted']);
+    }
+
     $status = $type->save();
     node_add_body_field($type);
 
only in patch2:
unchanged:
--- a/core/profiles/standard/config/install/node.type.article.yml
+++ b/core/profiles/standard/config/install/node.type.article.yml
@@ -7,4 +7,4 @@ description: 'Use <em>articles</em> for time-sensitive content like news, press
 help: ''
 new_revision: true
 preview_mode: 1
-display_submitted: true
+display_submitted: false