In Prestashop 1.5, i will like to remove this warning because is very boring
Warning: Parameter id_lang in function displayDate() is deprecated in /Applications/MAMP/htdocs/sviluppo/classes/helper/HelperList.php on line 287
in /Applications/MAMP/htdocs/sviluppo/classes/Tools.php on line 2147
This is the line 287
$this->_list[$index][$key] = Tools::displayDate($tr[$key], $this->context->language->id, true);
Thanks for help