diff --git a/core/modules/system/src/Form/DateFormatFormBase.php b/core/modules/system/src/Form/DateFormatFormBase.php
index 9653b8d..bf78cc4 100644
--- a/core/modules/system/src/Form/DateFormatFormBase.php
+++ b/core/modules/system/src/Form/DateFormatFormBase.php
@@ -130,8 +130,7 @@ public function validateForm(array &$form, FormStateInterface $form_state) {
     parent::validateForm($form, $form_state);
 
     // 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.
+    // machine name is available.
     $pattern = trim($form_state->getValue('date_format_pattern'));
     foreach ($this->dateFormatStorage->loadMultiple() as $format) {
       if ($format->getPattern() == $pattern && ($format->id() == $this->entity->id())) {