is::getStartDatePlan

public function getStartDatePlan($getCreatedDateOnNull = false)
{
	$date = $this->getStartDateOrCreatedDate($getCreatedDateOnNull);

	if(is_string($date) && !empty($date))
	{
		// $date contains user localtime
		return DateTime::createFromUserTime($date);
	}
	elseif($date instanceof DateTime)
	{
		return clone $date;
	}
	else
	{
		return null;
	}
}