+ $params['birth_date_low'] = array('name' => 'birth_date_low', 'type' => CRM_Utils_Type::T_DATE, 'title' => ts('Birthdate is equal to or greater than'));
+ $params['birth_date_high'] = array('name' => 'birth_date_high', 'type' => CRM_Utils_Type::T_DATE, 'title' => ts('Birthdate is equal to or less than'));
+ $params['deceased_date_low'] = array('name' => 'deceased_date_low','type' => CRM_Utils_Type::T_DATE, 'title' => ts('Deceased Date is equal to or greater than'));
+ $params['deceased_date_high'] = array('name' => 'deceased_date_high', 'type' => CRM_Utils_Type::T_DATE, 'title' => ts('Deceased Date is equal to or less than'));