diff --git a/core/lib/Drupal/Core/Datetime/Element/Datelist.php b/core/lib/Drupal/Core/Datetime/Element/Datelist.php
index c330a4f..f50bc0f 100644
--- a/core/lib/Drupal/Core/Datetime/Element/Datelist.php
+++ b/core/lib/Drupal/Core/Datetime/Element/Datelist.php
@@ -185,10 +185,7 @@ public static function processDatelist(&$element, FormStateInterface $form_state
     if ($date instanceOf DrupalDateTime) {
       $element['#date_timezone'] = $date->getTimezone()->getName();
     }
-    elseif (!empty($element['#timezone'])) {
-      $element['#date_timezone'] = $element['#date_timezone'];
-    }
-    else {
+    elseif (empty($element['#timezone'])) {
       $element['#date_timezone'] = drupal_get_user_timezone();
     }