diff --git a/core/lib/Drupal/Core/DrupalKernel.php b/core/lib/Drupal/Core/DrupalKernel.php
index 8651134..534a597 100644
--- a/core/lib/Drupal/Core/DrupalKernel.php
+++ b/core/lib/Drupal/Core/DrupalKernel.php
@@ -537,4 +537,12 @@ protected function getModuleNamespaces($moduleFileNames) {
   protected function registerNamespaces(array $namespaces = array()) {
     $this->classLoader->addPrefixes($namespaces);
   }
+
+  public function serialize() {
+    return serialize(array($this->environment, $this->debug, $this->classLoader, $this->allowDumping));
+  }
+  public function unserialize($data) {
+    list($environment, $debug, $class_loader, $allow_dumping) = unserialize($data);
+    $this->__construct($environment, $debug, $class_loader, $allow_dumping);
+  }
 }
diff --git a/core/modules/system/lib/Drupal/system/Form/DateFormatAddForm.php b/core/modules/system/lib/Drupal/system/Form/DateFormatAddForm.php
new file mode 100644
index 0000000..6dec855
--- /dev/null
+++ b/core/modules/system/lib/Drupal/system/Form/DateFormatAddForm.php
@@ -0,0 +1,93 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\system\Form\DateFormatAddForm.
+ */
+
+namespace Drupal\system\Form;
+
+/**
+ * Provides an add form for date formats.
+ */
+class DateFormatAddForm extends DateFormatFormBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getFormID() {
+    return 'date_format_add';
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function buildForm(array $form, array &$form_state) {
+    form_load_include($form_state, 'admin.inc', 'system');
+    $form['date_format_name'] = array(
+      '#type' => 'textfield',
+      '#title' => 'Name',
+      '#maxlength' => 100,
+      '#description' => t('Name of the date format'),
+      '#default_value' => '',
+    );
+
+    $form['date_format_id'] = array(
+      '#type' => 'machine_name',
+      '#title' => t('Machine-readable name'),
+      '#description' => t('A unique machine-readable name. Can only contain lowercase letters, numbers, and underscores.'),
+      '#default_value' => '',
+      '#machine_name' => array(
+        'exists' => 'system_date_format_exists',
+        'source' => array('date_format_name'),
+      ),
+    );
+
+    if (class_exists('intlDateFormatter')) {
+      $description = t('A user-defined date format. See the <a href="@url">PHP manual</a> for available options.', array('@url' => 'http://userguide.icu-project.org/formatparse/datetime'));
+    }
+    else {
+      $description = t('A user-defined date format. See the <a href="@url">PHP manual</a> for available options.', array('@url' => 'http://php.net/manual/function.date.php'));
+    }
+    $form['date_format_pattern'] = array(
+      '#type' => 'textfield',
+      '#title' => t('Format string'),
+      '#maxlength' => 100,
+      '#description' => $description,
+      '#default_value' => '',
+      '#field_suffix' => ' <small id="edit-date-format-suffix"></small>',
+      '#ajax' => array(
+        'callback' => 'system_date_time_lookup',
+        'event' => 'keyup',
+        'progress' => array('type' => 'throbber', 'message' => NULL),
+      ),
+      '#required' => TRUE,
+    );
+
+    $languages = language_list();
+
+    $options = array();
+    foreach ($languages as $langcode => $data) {
+      $options[$langcode] = $data->name;
+    }
+
+    if (!empty($options)) {
+      $form['date_langcode'] = array(
+        '#title' => t('Select localizations'),
+        '#type' => 'select',
+        '#options' => $options,
+        '#multiple' => TRUE,
+        '#default_value' => '',
+      );
+    }
+
+    $form['actions'] = array('#type' => 'actions');
+    $form['actions']['update'] = array(
+      '#type' => 'submit',
+      '#value' => t('Add format'),
+    );
+
+    return $form;
+  }
+
+}
diff --git a/core/modules/system/lib/Drupal/system/Form/DateFormatEditForm.php b/core/modules/system/lib/Drupal/system/Form/DateFormatEditForm.php
new file mode 100644
index 0000000..56afe28
--- /dev/null
+++ b/core/modules/system/lib/Drupal/system/Form/DateFormatEditForm.php
@@ -0,0 +1,131 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\system\Form\DateFormatEditForm.
+ */
+
+namespace Drupal\system\Form;
+
+use Drupal\Core\Config\ConfigFactory;
+use Drupal\Core\ControllerInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Provides an edit form for date formats.
+ */
+class DateFormatEditForm extends DateFormatFormBase implements ControllerInterface {
+
+  /**
+   * The config object.
+   *
+   * @var \Drupal\Core\Config\Config
+   */
+  protected $config;
+
+  /**
+   * Constructs a new date format form.
+   *
+   * @param \Drupal\Core\Config\ConfigFactory $config_factory
+   *   The config factory object.
+   */
+  public function __construct(ConfigFactory $config_factory) {
+    parent::__construct();
+
+    $this->config = $config_factory->get('system.date');
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container) {
+    return new static(
+      $container->get('config.factory')
+    );
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getFormID() {
+    return 'date_format_edit';
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function buildForm(array $form, array &$form_state, $date_format_id = NULL) {
+    form_load_include($form_state, 'admin.inc', 'system');
+    $format_info = $this->config->get('formats.' . $date_format_id);
+    $pattern = $this->patternType ? $format_info['pattern'][$this->patternType] : '';
+
+    $form['date_format_name'] = array(
+      '#type' => 'textfield',
+      '#title' => 'Name',
+      '#maxlength' => 100,
+      '#description' => t('Name of the date format'),
+      '#default_value' => empty($format_info['name']) ? '' : $format_info['name']
+    );
+
+    $now = t('Displayed as %date', array('%date' => format_date(REQUEST_TIME, $date_format_id)));
+
+    $form['date_format_id'] = array(
+      '#type' => 'machine_name',
+      '#title' => t('Machine-readable name'),
+      '#description' => t('A unique machine-readable name. Can only contain lowercase letters, numbers, and underscores.'),
+      '#disabled' => !empty($date_format_id),
+      '#default_value' => $date_format_id,
+      '#machine_name' => array(
+        'exists' => 'system_date_format_exists',
+        'source' => array('date_format_name'),
+      ),
+    );
+
+    if (class_exists('intlDateFormatter')) {
+      $description = t('A user-defined date format. See the <a href="@url">PHP manual</a> for available options.', array('@url' => 'http://userguide.icu-project.org/formatparse/datetime'));
+    }
+    else {
+      $description = t('A user-defined date format. See the <a href="@url">PHP manual</a> for available options.', array('@url' => 'http://php.net/manual/function.date.php'));
+    }
+    $form['date_format_pattern'] = array(
+      '#type' => 'textfield',
+      '#title' => t('Format string'),
+      '#maxlength' => 100,
+      '#description' => $description,
+      '#default_value' => $pattern,
+      '#field_suffix' => ' <small id="edit-date-format-suffix">' . $now . '</small>',
+      '#ajax' => array(
+        'callback' => 'system_date_time_lookup',
+        'event' => 'keyup',
+        'progress' => array('type' => 'throbber', 'message' => NULL),
+      ),
+      '#required' => TRUE,
+    );
+
+    $languages = language_list();
+
+    $options = array();
+    foreach ($languages as $langcode => $data) {
+      $options[$langcode] = $data->name;
+    }
+
+    if (!empty($options)) {
+      $form['date_langcode'] = array(
+        '#title' => t('Select localizations'),
+        '#type' => 'select',
+        '#options' => $options,
+        '#multiple' => TRUE,
+        '#default_value' => empty($format_info['locales']) ? '' : $format_info['locales']
+      );
+    }
+
+    $form['actions'] = array('#type' => 'actions');
+    $form['actions']['update'] = array(
+      '#type' => 'submit',
+      '#value' => t('Save format'),
+    );
+
+    return $form;
+  }
+
+}
diff --git a/core/modules/system/lib/Drupal/system/Form/DateFormatFormBase.php b/core/modules/system/lib/Drupal/system/Form/DateFormatFormBase.php
new file mode 100644
index 0000000..eef17d8
--- /dev/null
+++ b/core/modules/system/lib/Drupal/system/Form/DateFormatFormBase.php
@@ -0,0 +1,71 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\system\Form\DateFormatFormBase.
+ */
+
+namespace Drupal\system\Form;
+
+use Drupal\Core\Datetime\DrupalDateTime;
+use Drupal\Core\Form\FormInterface;
+use Drupal\Component\Utility\String;
+
+/**
+ * Provides a base form for date formats.
+ */
+abstract class DateFormatFormBase implements FormInterface {
+
+  /**
+   * The date pattern type.
+   *
+   * @var string
+   */
+  protected $patternType;
+
+  /**
+   * Constructs a new date format form.
+   */
+  public function __construct() {
+    $date = new DrupalDateTime();
+    $this->patternType = $date->canUseIntl() ? DrupalDateTime::INTL : DrupalDateTime::PHP;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function validateForm(array &$form, array &$form_state) {
+    $formats = system_get_date_formats();
+    $format = trim($form_state['values']['date_format_pattern']);
+
+    // The machine name field should already check to see if the requested
+    // machine name is available. Regardless of machine_name or human readable
+    // name, check to see if the provided pattern exists.
+    if (!empty($formats) && in_array($format, array_values($formats)) && (!isset($form_state['values']['date_format_id']) || $form_state['values']['date_format_id'] != $formats[$format]['date_format_id'])) {
+      form_set_error('date_format', t('This format already exists. Enter a unique format string.'));
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function submitForm(array &$form, array &$form_state) {
+    $format = array();
+    $format['name'] = String::checkPlain($form_state['values']['date_format_name']);
+    $format['pattern'][$this->patternType] = trim($form_state['values']['date_format_pattern']);
+    $format['locales'] = !empty($form_state['values']['date_langcode']) ? $form_state['values']['date_langcode'] : array();
+    // Formats created in the UI are not locked.
+    $format['locked'] = 0;
+
+    system_date_format_save($form_state['values']['date_format_id'], $format);
+    if (!empty($form_state['values']['date_format_id'])) {
+      drupal_set_message(t('Custom date format updated.'));
+    }
+    else {
+      drupal_set_message(t('Custom date format added.'));
+    }
+
+    $form_state['redirect'] = 'admin/config/regional/date-time/formats';
+  }
+
+}
diff --git a/core/modules/system/system.admin.inc b/core/modules/system/system.admin.inc
index 1566c80..50accd6 100644
--- a/core/modules/system/system.admin.inc
+++ b/core/modules/system/system.admin.inc
@@ -1884,92 +1884,6 @@ function system_date_time_formats() {
 }
 
 /**
- * Allow users to add additional date formats.
- *
- * @param string $date_format_id
- *   (optional) When present, provides the machine name of the date format that
- *   is being modified. Defaults to an empty string.
- */
-function system_configure_date_formats_form($form, &$form_state, $date_format_id = '') {
-  $formats = system_get_date_formats();
-  $format_info = config('system.date')->get('formats.' . $date_format_id);
-  $patterns = $format_info['pattern'];
-  $date = new DrupalDateTime;
-  $pattern = $date->canUseIntl() ? $patterns[DrupalDateTime::INTL] : $patterns[DrupalDateTime::PHP];
-
-  $form['date_format_name'] = array(
-    '#type' => 'textfield',
-    '#title' => 'Name',
-    '#maxlength' => 100,
-    '#description' => t('Name of the date format'),
-    '#default_value' => empty($format_info['name']) ? '' : $format_info['name']
-  );
-
-  $now = !empty($date_format_id) ? t('Displayed as %date', array('%date' => format_date(REQUEST_TIME, $date_format_id))) : '';
-
-  $form['date_format_id'] = array(
-    '#type' => 'machine_name',
-    '#title' => t('Machine-readable name'),
-    '#description' => t('A unique machine-readable name. Can only contain lowercase letters, numbers, and underscores.'),
-    '#disabled' => !empty($date_format_id),
-    '#default_value' => $date_format_id,
-    '#machine_name' => array(
-      'exists' => 'system_date_format_exists',
-      'source' => array('date_format_name'),
-    ),
-  );
-
-  if (class_exists('intlDateFormatter')) {
-    $description = t('A user-defined date format. See the <a href="@url">PHP manual</a> for available options.', array('@url' => 'http://userguide.icu-project.org/formatparse/datetime'));
-  }
-  else {
-    $description = t('A user-defined date format. See the <a href="@url">PHP manual</a> for available options.', array('@url' => 'http://php.net/manual/function.date.php'));
-  }
-  $form['date_format_pattern'] = array(
-    '#type' => 'textfield',
-    '#title' => t('Format string'),
-    '#maxlength' => 100,
-    '#description' => $description,
-    '#default_value' => empty($pattern) ? '' : $pattern,
-    '#field_suffix' => ' <small id="edit-date-format-suffix">' . $now . '</small>',
-    '#ajax' => array(
-      'callback' => 'system_date_time_lookup',
-      'event' => 'keyup',
-      'progress' => array('type' => 'throbber', 'message' => NULL),
-    ),
-    '#required' => TRUE,
-  );
-
-  $languages = language_list();
-
-  $options = array();
-  foreach ($languages as $langcode => $data) {
-    $options[$langcode] = $data->name;
-  }
-
-  if (!empty($options)) {
-    $form['date_langcode'] = array(
-      '#title' => t('Select localizations'),
-      '#type' => 'select',
-      '#options' => $options,
-      '#multiple' => TRUE,
-      '#default_value' => empty($format_info['locales']) ? '' : $format_info['locales']
-    );
-  }
-
-  $form['actions'] = array('#type' => 'actions');
-  $form['actions']['update'] = array(
-    '#type' => 'submit',
-    '#value' => (!empty($date_format_id) ? t('Save format') : t('Add format')),
-  );
-
-  $form['#validate'][] = 'system_date_formats_form_validate';
-  $form['#submit'][] = 'system_date_formats_form_submit';
-
-  return $form;
-}
-
-/**
  * Checks if the chosen machine_name exists or not.
  */
 function system_date_format_exists($candidate_machine_name) {
@@ -1980,45 +1894,6 @@ function system_date_format_exists($candidate_machine_name) {
 }
 
 /**
- * Validate date format string submission.
- */
-function system_date_formats_form_validate($form, &$form_state) {
-  $formats = system_get_date_formats();
-  $format = trim($form_state['values']['date_format_pattern']);
-
-  // The machine name field should already check to see if the requested
-  // machine name is available. Regardless of machine_name or human readable
-  // name, check to see if the provided pattern exists.
-  if (!empty($formats) && in_array($format, array_values($formats)) && (!isset($form_state['values']['date_format_id']) || $form_state['values']['date_format_id'] != $formats[$format]['date_format_id'])) {
-    form_set_error('date_format', t('This format already exists. Enter a unique format string.'));
-  }
-}
-
-/**
- * Process date format string submission.
- */
-function system_date_formats_form_submit($form, &$form_state) {
-  $date = new DrupalDateTime;
-  $pattern_type = $date->canUseIntl() ? DrupalDateTime::INTL : DrupalDateTime::PHP;
-  $format = array();
-  $format['name'] = check_plain($form_state['values']['date_format_name']);
-  $format['pattern'][$pattern_type] = trim($form_state['values']['date_format_pattern']);
-  $format['locales'] = !empty($form_state['values']['date_langcode']) ? $form_state['values']['date_langcode'] : array();
-  // Formats created in the UI are not locked.
-  $format['locked'] = 0;
-
-  system_date_format_save($form_state['values']['date_format_id'], $format);
-  if (!empty($form_state['values']['date_format_id'])) {
-    drupal_set_message(t('Custom date format updated.'));
-  }
-  else {
-    drupal_set_message(t('Custom date format added.'));
-  }
-
-  $form_state['redirect'] = 'admin/config/regional/date-time/formats';
-}
-
-/**
  * Page callback: Displays edit date format links for each language.
  *
  * @see locale_menu()
diff --git a/core/modules/system/system.module b/core/modules/system/system.module
index ce1b39b..e3a3387 100644
--- a/core/modules/system/system.module
+++ b/core/modules/system/system.module
@@ -889,13 +889,10 @@ function system_menu() {
     'title' => 'Add format',
     'description' => 'Allow users to add additional date formats.',
     'type' => MENU_LOCAL_ACTION,
-    'page callback' => 'drupal_get_form',
-    'page arguments' => array('system_configure_date_formats_form'),
-    'access arguments' => array('administer site configuration'),
+    'route_name' => 'date_format_add',
     'weight' => -10,
-    'file' => 'system.admin.inc',
   );
-  $items['admin/config/regional/date-time/formats/%system_date_format/edit'] = array(
+  $items['admin/config/regional/date-time/formats/%/edit'] = array(
     'title' => 'Edit date format',
     'description' => 'Allow users to edit a configured date format.',
     'page callback' => 'drupal_get_form',
@@ -903,7 +900,7 @@ function system_menu() {
     'access arguments' => array('administer site configuration'),
     'file' => 'system.admin.inc',
   );
-  $items['admin/config/regional/date-time/formats/%system_date_format/delete'] = array(
+  $items['admin/config/regional/date-time/formats/%/delete'] = array(
     'title' => 'Delete date format',
     'description' => 'Allow users to delete a configured date format.',
     'route_name' => 'date_format_delete',
@@ -3711,10 +3708,7 @@ function system_run_automated_cron() {
 /**
  * Gets the list of defined date formats and attributes.
  *
- * @param $date_format_id
- *   (optional) The date type name.
- *
- * @return
+ * @return array
  *   An associative array of date formats. The top-level keys are the
  *   machine-readable names of the date formats. The values are associative
  *   arrays with the following keys:
@@ -3722,32 +3716,9 @@ function system_run_automated_cron() {
  *   - pattern: An associative array of patterns that will modify the format
  *     of the date, keyed with 'php' for normal PHP date pattern and 'intl'
  *     for the alternate pattern used by the IntlDateFormatter.
- *
- *   If $date_format_id was defined, only the date formats associated with the
- *   given machine name are returned, in an associative array keyed by format
- *   string.
  */
-function system_get_date_formats($date_format_id = NULL) {
-  $date_formats = config('system.date')->get('formats');
-
-  // Return either the specific format or all formats.
-  return empty($date_format_id) ? $date_formats : $date_formats[$date_format_id];
-}
-
-/**
- * Menu loader function for a date format.
- *
- * @param $date_format_id
- *   The date type name.
- *
- * @return
- *   The date format id if it exists and is not locked, FALSE otherwise.
- */
-function system_date_format_load($date_format_id) {
-  if (($format = system_get_date_formats($date_format_id)) && empty($format['locked'])) {
-    return $date_format_id;
-  }
-  return FALSE;
+function system_get_date_formats() {
+  return config('system.date')->get('formats');
 }
 
 /**
diff --git a/core/modules/system/system.routing.yml b/core/modules/system/system.routing.yml
index 9859d6a..dd0466e 100644
--- a/core/modules/system/system.routing.yml
+++ b/core/modules/system/system.routing.yml
@@ -74,6 +74,20 @@ system_site_maintenance_mode:
   requirements:
     _permission: 'administer site configuration'
 
+date_format_add:
+  pattern: '/admin/config/regional/date-time/formats/add'
+  defaults:
+    _form: '\Drupal\system\Form\DateFormatAddForm'
+  requirements:
+    _permission: 'administer site configuration'
+
+date_format_edit:
+  pattern: '/admin/config/regional/date-time/formats/{date_format_id}/edit'
+  defaults:
+    _form: '\Drupal\system\Form\DateFormatEditForm'
+  requirements:
+    _permission: 'administer site configuration'
+
 date_format_delete:
   pattern: 'admin/config/regional/date-time/formats/{format_id}/delete'
   defaults: