public function convertData($data)
{
$data = parent::convertData($data);
if ($data === null && !$this->convert_null_to_now) {
return null;
}
$date = new SwatDate($data);
$date->setTZbyID($this->src_tz_id);
$date->convertTZbyID($this->dst_tz_id);
$data = $date->getDate();
return $data;
}