ENGCOM-9256: Fixed error DOT field with Portugal locale #34148

 - Merge Pull Request #34148 from AZiniukhin/magento2:34130_Fixed_error_DOT_field_with_Portugal_locale
 - Merged commits:
   1. b605562
   2. 6d1468c
   3. 4ba1b37
   4. 419bcf5
   5. d7a8fdc

Author: magento-engcom-team

app/code/Magento/Customer/Block/Widget/Dob.php

@@ -28,8 +28,6 @@ class Dob extends AbstractWidget
     const MAX_DATE_RANGE_KEY = 'date_range_max';
 
     /**
-     * Date inputs
-     *
      * @var array
      */
     protected $_dateInputs = [];
@@ -422,7 +420,8 @@ public function getTranslatedCalendarConfigJson(): string
                 'monthNamesShort' => array_values(iterator_to_array($monthsData['format']['abbreviated'])),
                 'dayNames' => array_values(iterator_to_array($daysData['format']['wide'])),
                 'dayNamesShort' => array_values(iterator_to_array($daysData['format']['abbreviated'])),
-                'dayNamesMin' => array_values(iterator_to_array($daysData['format']['short'])),
+                'dayNamesMin' =>
+                 array_values(iterator_to_array(($daysData['format']['short']) ?: $daysData['format']['abbreviated'])),
             ]
         );
     }