function filter_where_2($where = '') { 
    $where .= " AND post_date > '" . date('Y-m-d', strtotime('-15 days')) . "'"; 
    return $where; 
} 
add_filter( 'posts_where', 'filter_where_2' );  

							$args = array( 'post_type' => 'listing', 'posts_per_page' => 99999, 'tax_query' => array(
											array(
												'taxonomy' => $taxonomy,
												'field' => 'id',
												'terms' => $term_id
											)
										));

							$listing_marker_loop = new WP_Query( $args );

							while ( $listing_marker_loop->have_posts() ) : $listing_marker_loop->the_post();