WordPress plugin that will set Tribe Events Calendar events to draft status 1 day after event ends.

brh-tec-demote.php

<?php
/**
 * Plugin Name:       TEC Demote Events
 * Plugin URI:
 * Description:       Set expired events as drafts one day after end date.
 * Version:           1.0.0
 * Author:            Ben Hays
 * Author URI:        http://benjaminhays.com
 * License:           GPL-2.0+
 * License URI:       http://www.gnu.org/licenses/gpl-2.0.txt
 * Text Domain:       brh-tec-demote
 */

// If this file is called directly, abort.
if ( ! defined( 'WPINC' ) ) {
	die;
}

define( 'BRH_TEC_DEMOTE_VERSION', '1.0.0' );

/**
 * The code that runs during plugin activation.
 */
function activate_brh_tec_demote() {
	if( !wp_next_scheduled( 'tec_demote' ) ) {
		wp_schedule_event( time(), 'daily', 'tec_demote' );
	}
}

/**
 * The code that runs during plugin deactivation.
 */
function deactivate_brh_tec_demote() {
	$timestamp = wp_next_scheduled( 'tec_demote' );
	wp_unschedule_event( $timestamp, 'tec_demote' );
}

register_activation_hook( __FILE__, 'activate_brh_tec_demote' );
register_deactivation_hook( __FILE__, 'deactivate_brh_tec_demote' );

// here's the function we'd like to call with our cron job
function tec_demote_events() {
	// Get all published events that have past
	$yesterday = strtotime('yesterday 23:59:59');
	$args = array(
		'post_status'                  => 'publish',
		'post_type'                    => 'tribe_events',
		'posts_per_page'               => 100,
		'no_found_rows'                => true,
		'update_post_term_cache'       => false,
		'tribe_suppress_query_filters' => true,
		'fields'                       => 'ids',
		'meta_query'                   => array(
			array(
				'key'     => '_EventEndDate',
				'value'   => $yesterday,
				'compare' => '>='
			),
		),
	);
	$events = new WP_Query($args);

	// Set status to draft
	if( $events->have_posts() ){
		foreach( $events['posts'] as $p ){
			$query = array(
				'ID'          => $p,
				'post_status' => 'draft',
			);
			wp_update_post( $query, true );
		}
	}
}

// hook that function onto our scheduled event:
add_action ('tec_demote', 'tec_demote_events');