$args = array(
'offset'=>$offset,
'posts_per_page'=> $per_page ,
'paged' => $current_page,
'cat' => array($ilan_cat),
'date_query' => array(
array(

'after' => $tarih1,
'before' => $tarih2.' 23:59',
'inclusive' => true,
),
),
);

$args = array(
    'offset'        => $offset,
    'posts_per_page'=> $per_page,
    'paged'         => $current_page,
    'cat'           => array($ilan_cat),
    'date_query'    => array(
        array(
            'after'     => ! empty($tarih1) ? $tarih1 : date('Y-m-d'),
            'before'    => ! empty($tarih2) ? $tarih2 . ' 23:59' : date('Y-m-d') . ' 23:59',
            'inclusive' => true,
        ),
    ),
);