/**
* Constructor
*
* @param string $date
* @param array $data
* @param int $year
* @param int $month display month, it can differ from a month in date
*/
public function __construct($date, $data, $year, $month)
{
parent::__construct($date);
$this->_data = $data;
$this->_year = $year;
$this->_displayMonth = $month;
}
