diff --git a/core/includes/common.inc b/core/includes/common.inc
index 769b7f0..d71f95a 100644
--- a/core/includes/common.inc
+++ b/core/includes/common.inc
@@ -5,7 +5,7 @@
 use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
 use Drupal\Component\Utility\NestedArray;
 use Drupal\Core\Cache\CacheBackendInterface;
-use Drupal\Core\Datetime\DrupalDate;
+use Drupal\Component\Datetime\DrupalDate;
 use Drupal\Core\Database\Database;
 use Drupal\Core\Template\Attribute;
 
diff --git a/core/lib/Drupal/Component/Datetime/DateObject.php b/core/lib/Drupal/Component/Datetime/DateObject.php
index 543d49b..17fb2ae 100644
--- a/core/lib/Drupal/Component/Datetime/DateObject.php
+++ b/core/lib/Drupal/Component/Datetime/DateObject.php
@@ -258,7 +258,7 @@ public function prepareTimezone($timezone) {
     // If the system timezone is missing, use 'UTC'.
     if (empty($timezone_adjusted) || !$timezone_adjusted instanceOf \DateTimezone) {
       $system_timezone = date_default_timezone_get();
-      $timezone_name = !empty($system_timezone) ? $system_timezone: 'UTC';
+      $timezone_name = !empty($system_timezone) ? $system_timezone : 'UTC';
       $timezone_adjusted = new \DateTimeZone($timezone_name);
     }
 
@@ -670,7 +670,7 @@ function format($format, $settings = array()) {
       // If we have what we need to use the IntlDateFormatter, do so.
       if ($this->canUseIntl() && $format_string_type == self::INTL) {
 
-        $calendartype = \IntlDateFormatter::GREGORIAN;
+        $calendar_type = \IntlDateFormatter::GREGORIAN;
 
         // If we have information about a calendar and it's not already
         // in the locale, add it.
@@ -680,12 +680,12 @@ function format($format, $settings = array()) {
 
         // If we're working with a non-gregorian calendar, indicate that.
         if (stristr($locale, '@calendar=') && !stristr($locale, '@calendar=' . SELF::CALENDAR)) {
-          $calendartype = \IntlDateFormatter::TRADITIONAL;
+          $calendar_type = \IntlDateFormatter::TRADITIONAL;
         }
 
         $datetype = !empty($settings['datetype']) ? $settings['datetype'] : \IntlDateFormatter::FULL;
         $timetype = !empty($settings['timetype']) ? $settings['timetype'] : \IntlDateFormatter::FULL;
-        $formatter = new \IntlDateFormatter($locale, $datetype, $timetype, $timezone, $calendartype);
+        $formatter = new \IntlDateFormatter($locale, $datetype, $timetype, $timezone, $calendar_type);
         $formatter->setLenient($lenient);
         $value = $formatter->format($format);
       }
@@ -700,4 +700,4 @@ function format($format, $settings = array()) {
     }
     return $value;
   }
-}
\ No newline at end of file
+}
diff --git a/core/lib/Drupal/Component/Datetime/DrupalDate.php b/core/lib/Drupal/Component/Datetime/DrupalDate.php
index f13e8d3..ba42ca4 100644
--- a/core/lib/Drupal/Component/Datetime/DrupalDate.php
+++ b/core/lib/Drupal/Component/Datetime/DrupalDate.php
@@ -4,7 +4,7 @@
  * @file
  * Definition of DrupalDate.
  */
-namespace Drupal\Core\Datetime;
+namespace Drupal\Component\Datetime;
 
 use Drupal\Component\Datetime\DateObject;
 
diff --git a/core/lib/Drupal/Core/TypedData/Type/Date.php b/core/lib/Drupal/Core/TypedData/Type/Date.php
index f081830..c5ed4ab 100644
--- a/core/lib/Drupal/Core/TypedData/Type/Date.php
+++ b/core/lib/Drupal/Core/TypedData/Type/Date.php
@@ -7,7 +7,7 @@
 
 namespace Drupal\Core\TypedData\Type;
 
-use Drupal\Core\Datetime\DrupalDate;
+use Drupal\Component\Datetime\DrupalDate;
 use Drupal\Core\TypedData\TypedDataInterface;
 use InvalidArgumentException;
 
diff --git a/core/modules/comment/lib/Drupal/comment/CommentFormController.php b/core/modules/comment/lib/Drupal/comment/CommentFormController.php
index 9613320..c2923e2 100644
--- a/core/modules/comment/lib/Drupal/comment/CommentFormController.php
+++ b/core/modules/comment/lib/Drupal/comment/CommentFormController.php
@@ -7,7 +7,7 @@
 
 namespace Drupal\comment;
 
-use Drupal\Core\Datetime\DrupalDate;
+use Drupal\Component\Datetime\DrupalDate;
 use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Entity\EntityFormController;
 
diff --git a/core/modules/node/lib/Drupal/node/NodeFormController.php b/core/modules/node/lib/Drupal/node/NodeFormController.php
index ff5ff6d..7a65341 100644
--- a/core/modules/node/lib/Drupal/node/NodeFormController.php
+++ b/core/modules/node/lib/Drupal/node/NodeFormController.php
@@ -7,7 +7,7 @@
 
 namespace Drupal\node;
 
-use Drupal\Core\Datetime\DrupalDate;
+use Drupal\Component\Datetime\DrupalDate;
 use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Entity\EntityFormController;
 
diff --git a/core/modules/node/node.module b/core/modules/node/node.module
index ede29a1..0dadcbd 100644
--- a/core/modules/node/node.module
+++ b/core/modules/node/node.module
@@ -14,7 +14,7 @@
 use Drupal\Core\Database\Query\AlterableInterface;
 use Drupal\Core\Database\Query\SelectExtender;
 use Drupal\Core\Database\Query\SelectInterface;
-use Drupal\Core\Datetime\DrupalDate;
+use Drupal\Component\Datetime\DrupalDate;
 use Drupal\Core\Template\Attribute;
 use Drupal\node\Node;
 use Drupal\file\File;
@@ -1107,8 +1107,8 @@ function node_submit($node) {
   if (!empty($node->revision)) {
     $node->revision_uid = $user->uid;
   }
-  $date = new DrupalDate($node->date);
-  $node->created = $date->getTimestamp();
+  $node_created = new DrupalDate(!empty($node->date) ? $node->date : REQUEST_TIME);
+  $node->created = $node_created->getTimestamp();
   $node->validated = TRUE;
 
   return $node;
diff --git a/core/modules/system/lib/Drupal/system/Tests/TypedData/TypedDataTest.php b/core/modules/system/lib/Drupal/system/Tests/TypedData/TypedDataTest.php
index bc3863b..d1d8b92 100644
--- a/core/modules/system/lib/Drupal/system/Tests/TypedData/TypedDataTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/TypedData/TypedDataTest.php
@@ -8,7 +8,7 @@
 namespace Drupal\system\Tests\TypedData;
 
 use Drupal\simpletest\WebTestBase;
-use Drupal\Core\Datetime\DrupalDate;
+use Drupal\Component\Datetime\DrupalDate;
 use DateInterval;
 
 /**