diff --git a/core/includes/common.inc b/core/includes/common.inc
index 7345179..52c95b1 100644
--- a/core/includes/common.inc
+++ b/core/includes/common.inc
@@ -1931,11 +1931,9 @@ function format_date($timestamp, $type = 'medium', $format = '', $timezone = NUL
   // Call date_format().
   $settings = array('langcode' => $langcode);
   $formatted_date = $date_time->format($format, $settings);
-  
+
   $context = array(
-    'settings' => $settings,
     'date_time' => $date_time,
-    'timezones' => $timezones,
     'timestamp' => $timestamp,
     'type' => $type,
     'format' => $format,
@@ -1943,7 +1941,7 @@ function format_date($timestamp, $type = 'medium', $format = '', $timezone = NUL
     'langcode' => $langcode,
   );
   drupal_alter('format_date', $formatted_date, $context);
-  
+
   return $formatted_date;
 }
 
diff --git a/core/modules/system/system.api.php b/core/modules/system/system.api.php
index 35d3976..c1a1a3b 100644
--- a/core/modules/system/system.api.php
+++ b/core/modules/system/system.api.php
@@ -3952,20 +3952,20 @@ function hook_filetransfer_info_alter(&$filetransfer_info) {
 /**
  * Alter the formatted date.
  *
- * A module may implement this hook in order to alter the formatted date string
+ * A module may implement this hook in order to alter the formatted date string.
+ *
+ * @param string $formatted_date
+ *   The formatted date.
+ * @param array $context
+ *   An associative array containing:
+ *   - date_time: The DrupalDateTime object with the date to format.
+ *   - timestamp: The UNIX timestamp to format.
+ *   - type: The format to use as passed to format_date().
+ *   - format: If type is 'custom', a PHP date format string suitable for input
+ *     to date().
+ *   - timezone: The time zone as passed to format_date().
+ *   - langcode: The language code as passed to format_date().
  *
- * @param $formatted_date
- *   Formatted date in string.
- * @param $context
- *   Array of format_date function arguments and defined variables .
- *   - settings
- *   - date_time
- *   - timezones
- *   - timestamp
- *   - type
- *   - format
- *   - timezone
- *   - langcode
  * @see format_date()
  */
 function hook_format_date_alter(&$formatted_date, array $context) {