$curdate = "1.06.2016";//как пример
$lastdate = "31.06.2016";
$GLOBALS['ar2Filter'] = Array(
"ACTIVE" => "Y",
//">=DATA_SOBYTIYA" => $curdate,
"!PROPERTY" => array(
//">=DATA_SOBYTIYA" => $curdate,
'DATA_SOBYTIYA' => array(
//">=VALUE" => $curdate,'
VALUE' => false,
//"<=VALUE" => $lastdate)
//"<=DATA_SOBYTIYA" => $lastdate
),
//"<=DATA_SOBYTIYA" => $lastdate
);