ENGCOM-4377: Fixed #21425 Date design change show not correctly value in backend #21443

Author: sivaschenko

app/code/Magento/Backend/Block/System/Design/Edit/Tab/General.php

@@ -6,6 +6,9 @@
 
 namespace Magento\Backend\Block\System\Design\Edit\Tab;
 
+/**
+ * General system tab block.
+ */
 class General extends \Magento\Backend\Block\Widget\Form\Generic
 {
     /**
@@ -90,7 +93,7 @@ protected function _prepareForm()
             ]
         );
 
-        $dateFormat = $this->_localeDate->getDateFormat(\IntlDateFormatter::SHORT);
+        $dateFormat = $this->_localeDate->getDateFormatWithLongYear();
         $fieldset->addField(
             'date_from',
             'date',