Genesis Hide Old Post Dates - Do not show post date on posts older than 30 days.

genesis-hide-old-post-dates.php

<?php
/*
Plugin Name: Genesis Hide Old Post Dates
Plugin URI: https://www.damiencarbery.com/2021/02/hide-old-post-dates-in-genesis/
Description: Do not show post date on posts older than 30 days.
Author: Damien Carbery
Author URI: https://www.damiencarbery.com
Version: 0.2
*/

function dcwd_hide_old_post_info($post_info) {
    $now = time();  // Get current time in "seconds since epoch" format.
    $date = get_the_date( 'U' );  // Get post date in "seconds since epoch" format.
    
    // If post is more than 30 days old then change the post info to remove post date.
    if ( $now - $date > MONTH_IN_SECONDS ) {
        $post_info = str_replace( '[post_date]', '', $post_info );
    }
    
	return $post_info;
}
add_filter('genesis_post_info', 'dcwd_hide_old_post_info');