I have post types called articles and I want to add a tag to the post, if it was published -100 days of the current date. This is so I can filter these and showcase the most recent posts, and the user can filter the tag on the posts to see recently added posts (this is posts -100 days of the current date). if ( $query->have_posts() ) { ?> Found <?php echo $query->found_posts; ?> Results<br /> <div class='search-filter-results-list'> <?php while ( $query->have_posts() ) { $query->the_post(); // Get post published date $post_date = get_the_date('Ymd'); $current_date = current_time('Ymd'); $future_date = date('Ymd', strtotime('-100 days')); // Check if post published date is -100 days before the current date $class_to_add = ($post_date <= $current_date && $post_date >= $future_date) ? ' your-custom-class' : ''; ?> <div class='search-filter-result-item<?php echo esc_attr($class_to_add); ?>'> <h2><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h2> <p><br /><?php the_excerpt(); ?></p> <?php if ( has_post_thumbnail() ) : ?> <p><?php the_post_thumbnail( 'small' ); ?></p> <?php endif; ?> <p><?php the_category(); ?></p> <p><?php the_tags(); ?></p> <p><small><?php the_date(); ?></small></p> <hr /> </div> <?php } ?> </div> <?php } Does anyone have any suggestions? Thank you!