diff -u b/core/lib/Drupal/Component/Datetime/DateTimePlus.php b/core/lib/Drupal/Component/Datetime/DateTimePlus.php
--- b/core/lib/Drupal/Component/Datetime/DateTimePlus.php
+++ b/core/lib/Drupal/Component/Datetime/DateTimePlus.php
@@ -177,7 +177,7 @@
    *   to use things like negative years, which php's parser fails on, or
    *   any other specialized input with a known format. If provided the
    *   date will be created using the createFromFormat() method.
-   *   @see http://us3.php.net/manual/datetime.createfromformat.php
+   *   @see http://php.net/manual/datetime.createfromformat.php
    * @param mixed $time
    *   @see __construct()
    * @param mixed $timezone
@@ -389,7 +389,7 @@
    * PHP creates a valid date from invalid data with only a warning,
    * 2011-02-30 becomes 2011-03-03, for instance, but we don't want that.
    *
-   * @see http://us3.php.net/manual/time.getlasterrors.php
+   * @see http://php.net/manual/time.getlasterrors.php
    */
   public function checkErrors() {
     $errors = \DateTime::getLastErrors();
diff -u b/core/modules/views/src/Plugin/views/field/Date.php b/core/modules/views/src/Plugin/views/field/Date.php
--- b/core/modules/views/src/Plugin/views/field/Date.php
+++ b/core/modules/views/src/Plugin/views/field/Date.php
@@ -111,7 +111,7 @@
     $form['custom_date_format'] = array(
       '#type' => 'textfield',
       '#title' => $this->t('Custom date format'),
-      '#description' => $this->t('If "Custom", see <a href="http://us.php.net/manual/function.date.php" target="_blank">the PHP docs</a> for date formats. Otherwise, enter the number of different time units to display, which defaults to 2.'),
+      '#description' => $this->t('If "Custom", see <a href="http://php.net/manual/function.date.php" target="_blank">the PHP docs</a> for date formats. Otherwise, enter the number of different time units to display, which defaults to 2.'),
       '#default_value' => isset($this->options['custom_date_format']) ? $this->options['custom_date_format'] : '',
     );
     // Setup #states for all possible date_formats on the custom_date_format form element.