diff --git a/core/modules/comment/lib/Drupal/comment/CommentFormController.php b/core/modules/comment/lib/Drupal/comment/CommentFormController.php
index cead0cd..9bb28a8 100644
--- a/core/modules/comment/lib/Drupal/comment/CommentFormController.php
+++ b/core/modules/comment/lib/Drupal/comment/CommentFormController.php
@@ -63,7 +63,6 @@ public function form(array $form, array &$form_state, EntityInterface $comment)
     if ($is_admin) {
       $author = (!$comment->uid && $comment->name ? $comment->name : $comment->registered_name);
       $status = (isset($comment->status) ? $comment->status : COMMENT_NOT_PUBLISHED);
-      $date = (!empty($comment->date) ? $comment->date : format_date($comment->created, 'custom', 'Y-m-d H:i O'));
     }
     else {
       if ($user->uid) {
@@ -73,7 +72,10 @@ public function form(array $form, array &$form_state, EntityInterface $comment)
         $author = ($comment->name ? $comment->name : '');
       }
       $status = (user_access('skip comment approval') ? COMMENT_PUBLISHED : COMMENT_NOT_PUBLISHED);
-      $date = '';
+    }
+    $date = '';
+    if (!empty($comment->cid)) {
+      $date = (!empty($comment->date) ? $comment->date : format_date($comment->created, 'custom', 'Y-m-d H:i O'));
     }
 
     // Add the author name field depending on the current user.
diff --git a/core/modules/comment/lib/Drupal/comment/Tests/CommentPreviewTest.php b/core/modules/comment/lib/Drupal/comment/Tests/CommentPreviewTest.php
index e9e197a..da1ea92 100644
--- a/core/modules/comment/lib/Drupal/comment/Tests/CommentPreviewTest.php
+++ b/core/modules/comment/lib/Drupal/comment/Tests/CommentPreviewTest.php
@@ -71,7 +71,7 @@ function testCommentPreview() {
    */
   function testCommentEditPreviewSave() {
     $langcode = LANGUAGE_NOT_SPECIFIED;
-    $web_user = $this->drupalCreateUser(array('access comments', 'post comments', 'skip comment approval'));
+    $web_user = $this->drupalCreateUser(array('access comments', 'post comments', 'skip comment approval', 'edit own comments'));
     $this->drupalLogin($this->admin_user);
     $this->setCommentPreview(DRUPAL_OPTIONAL);
     $this->setCommentForm(TRUE);
@@ -128,6 +128,16 @@ function testCommentEditPreviewSave() {
     $this->assertEqual($comment_loaded->name, $edit['name'], 'Name loaded.');
     $this->assertEqual($comment_loaded->created, $raw_date, 'Date loaded.');
 
+    // Check that the date and time of the comment are correct when edited.
+    $this->drupalLogout();
+    $user_edit = array();
+    $user_edit['subject'] = $this->randomName(8);
+    $this->drupalLogin($web_user);
+    $this->drupalPost('comment/' . $comment->id . '/edit', $user_edit, t('Save'));
+    $this->drupalGet('node/' . $this->node->nid);
+    $this->assertText($expected_text_date, 'Expected date and time for comment edited.');
+    $this->drupalLogout();
+
   }
 
 }