How to limit related posts to a certain time?

Hi bebibu. First thing is you need to be running a child theme. If you already have a child theme, but no functions.php file, you’ll need to create one using FTP or cPanel on your host. Add this to the top of that file:

<?php
/* ------------------------------------------------------------------------- *
 *  Custom functions
/* ------------------------------------------------------------------------- */
	// Add your custom functions here, or overwrite existing ones. Read more how to use:
	// https://codex.www.ads-software.com/Child_Themes

If you’re not currently running a child theme, download the preconfigured child theme from the theme web site. After activating the child theme you’ll have a style.css file and functions.php file.

Then you would copy the entire parent theme function alx_related_posts() to your child theme functions.php file. I’ve included it here for reference:

function alx_related_posts() {
	wp_reset_postdata();
	global $post;

	// Define shared post arguments
	$args = array(
		'no_found_rows'			=> true,
		'update_post_meta_cache'	=> false,
		'update_post_term_cache'	=> false,
		'ignore_sticky_posts'		=> 1,
		'orderby'			=> 'rand',
		'post__not_in'			=> array($post->ID),
		'posts_per_page'		=> 3
	);
	// Related by categories
	if ( ot_get_option('related-posts') == 'categories' ) {

		$cats = get_post_meta($post->ID, 'related-cat', true);

		if ( !$cats ) {
			$cats = wp_get_post_categories($post->ID, array('fields'=>'ids'));
			$args['category__in'] = $cats;
		} else {
			$args['cat'] = $cats;
		}
	}
	// Related by tags
	if ( ot_get_option('related-posts') == 'tags' ) {

		$tags = get_post_meta($post->ID, 'related-tag', true);

		if ( !$tags ) {
			$tags = wp_get_post_tags($post->ID, array('fields'=>'ids'));
			$args['tag__in'] = $tags;
		} else {
			$args['tag_slug__in'] = explode(',', $tags);
		}
		if ( !$tags ) { $break = true; }
	}

	$query = !isset($break)?new WP_Query($args):new WP_Query;
	return $query;
}

At the top of the function you’ll see the arguments that are used to filter the posts query. You would add a date_query argument to the query arguments array so it looks like this:

// Define shared post arguments
$args = array(
	'date_query' => array(
		array(
			'column' => 'post_date_gmt',
			'after' => '2 months ago',
			),
		),
	'no_found_rows'			=> true,
	'update_post_meta_cache'	=> false,
	'update_post_term_cache'	=> false,
	'ignore_sticky_posts'		=> 1,
	'orderby'			=> 'rand',
	'post__not_in'			=> array($post->ID),
	'posts_per_page'		=> 3
);
// Related by categories

This will bring in only those posts created within the last two months.

Let me know if you have any questions.

Awesome! It’s work.

Thank you, bdbrown.

Case closed.