#32990: Date and Time Format for Custom Option Not Working

- fixed Catalog Date & Time custom options not honoring Date Fields Order when using JS calendar

Author: NitrogenUA

app/code/Magento/Catalog/Block/Product/View/Options/Type/Date.php

@@ -93,7 +93,10 @@ public function getCalendarDateHtml()
         $yearStart = $this->_catalogProductOptionTypeDate->getYearStart();
         $yearEnd = $this->_catalogProductOptionTypeDate->getYearEnd();
 
-        $dateFormat = $this->_localeDate->getDateFormatWithLongYear();
+        $fieldsSeparator = '/';
+        $fieldsOrder = $this->_catalogProductOptionTypeDate->getConfigData('date_fields_order') ?? '';
+        $fieldsOrder = str_replace(",", $fieldsSeparator, $fieldsOrder);
+        $dateFormat = $fieldsOrder ?: $this->_localeDate->getDateFormatWithLongYear();
         /** Escape RTL characters which are present in some locales and corrupt formatting */
         $escapedDateFormat = preg_replace('/[^MmDdYy\/\.\-]/', '', $dateFormat);
         $value = null;