How to get posts published in the last 30 days using WP_Query

get-posts-published-last-30-days.php

<?php

$paged = get_query_var('paged') ? get_query_var('paged') : 1;
$args = array(
    'post_type' => 'post',
    'order'=>'DESC',
    'posts_per_page' => 12,
    'date_query' => array(
        array(
            'after'     => '-30 days',
            'column' => 'post_date',
        ),
    ),
    'paged' => $paged
);
$loop = new WP_Query( $args );   
while ( $loop->have_posts() ) : $loop->the_post(); 
   
   // LOOP CONTENT HERE
 
endwhile; 

?>

<?php wp_pagenavi( array( 'query' => $loop ) ); ?>

<?php 
wp_reset_query();
wp_reset_postdata(); 
?>