Tools\Utility\Time::_strftime PHP Method

    protected static function _strftime($format, $date)
    {
        $format = strftime($format, $date);
        $encoding = Configure::read('App.encoding');
        if (!empty($encoding) && $encoding === 'UTF-8') {
            $valid = mb_check_encoding($format, $encoding);
            if (!$valid) {
                $format = utf8_encode($format);
            }
        }
        return $format;
    }