diff --git a/core/lib/Drupal/Core/Datetime/Plugin/Field/FieldWidget/TimestampDatetimeWidget.php b/core/lib/Drupal/Core/Datetime/Plugin/Field/FieldWidget/TimestampDatetimeWidget.php
index 66ac11d..fd2ff3e 100644
--- a/core/lib/Drupal/Core/Datetime/Plugin/Field/FieldWidget/TimestampDatetimeWidget.php
+++ b/core/lib/Drupal/Core/Datetime/Plugin/Field/FieldWidget/TimestampDatetimeWidget.php
@@ -39,7 +39,8 @@ public function formElement(FieldItemListInterface $items, $delta, array $elemen
       '#default_value' => $default_value,
       '#date_year_range' => '1902:2037',
     );
-    $element['value']['#description'] = $this->t('Format: %format. Leave blank to use the time of form submission.', array('%format' => Datetime::formatExample($date_format . ' ' . $time_format)));
+    $element['value']['#description'] = empty($element['#description']) ? '' : $element['#description'] . ' ';
+    $element['value']['#description'] .= $this->t('Format: %format. Leave blank to use the time of form submission.', array('%format' => Datetime::formatExample($date_format . ' ' . $time_format)));
 
     return $element;
   }
diff --git a/core/profiles/standard/src/Tests/StandardTest.php b/core/profiles/standard/src/Tests/StandardTest.php
index ee867d1..d3510e8 100644
--- a/core/profiles/standard/src/Tests/StandardTest.php
+++ b/core/profiles/standard/src/Tests/StandardTest.php
@@ -43,6 +43,7 @@ function testStandard() {
     // Test anonymous user can access 'Main navigation' block.
     $this->adminUser = $this->drupalCreateUser(array(
       'administer blocks',
+      'administer nodes',
       'post comments',
       'skip comment approval',
       'create article content',
@@ -80,6 +81,11 @@ function testStandard() {
     $this->drupalLogout();
     $this->assertText('Main navigation');
 
+    // Check if created widget displays correct description.
+    $this->drupalLogin($this->adminUser);
+    $this->drupalGet('node/add/article');
+    $this->assertText('The time that the node was created.', 'Created field description found.');
+
     // Ensure comments don't show in the front page RSS feed.
     // Create an article.
     $this->drupalCreateNode(array(
@@ -91,7 +97,6 @@ function testStandard() {
     ));
 
     // Add a comment.
-    $this->drupalLogin($this->adminUser);
     $this->drupalGet('node/1');
     $this->assertRaw('Then she picked out two somebodies,<br />Sally and me', 'Found a line break.');
     $this->drupalPostForm(NULL, array(