diff --git a/core/includes/common.inc b/core/includes/common.inc
index b361be5..ae9d752 100644
--- a/core/includes/common.inc
+++ b/core/includes/common.inc
@@ -593,7 +593,7 @@ function format_size($size, $langcode = NULL) {
  *   - One of the built-in formats: 'short', 'medium',
  *     'long', 'html_datetime', 'html_date', 'html_time',
  *     'html_yearless_date', 'html_week', 'html_month', 'html_year'.
- *   - The name of a date type defined by a module in config.
+ *   - The name of a date type defined by a date format config entity.
  *   - The machine name of an administrator-defined date format.
  *   - 'custom', to use $format.
  *   Defaults to 'medium'.
diff --git a/core/lib/Drupal/Core/Datetime/DateFormatter.php b/core/lib/Drupal/Core/Datetime/DateFormatter.php
index da6948c..b97f2e1 100644
--- a/core/lib/Drupal/Core/Datetime/DateFormatter.php
+++ b/core/lib/Drupal/Core/Datetime/DateFormatter.php
@@ -103,7 +103,7 @@ public function __construct(EntityManagerInterface $entity_manager, LanguageMana
    *   - One of the built-in formats: 'short', 'medium',
    *     'long', 'html_datetime', 'html_date', 'html_time',
    *     'html_yearless_date', 'html_week', 'html_month', 'html_year'.
-   *   - The name of a date type defined by a module in config.
+   *   - The name of a date type defined by a date format config entity.
    *   - The machine name of an administrator-defined date format.
    *   - 'custom', to use $format.
    *   Defaults to 'medium'.