I have been trying to perform the action of sending an email according to the status of a meta_key that is in time format. I can only do it according to the status of the order, but the most important thing is the date. I share the code that I have made, but I think it needs a twist. Something strange I have found is that now the post type is called shop_order_placehold and not shop_order, in wp_post function add_order_expiration_date_field($order) { $expiration_date = get_post_meta($order->get_id(), '_order_expiration_date', true); ?> <div class=""> <h4><?php _e('Expiration date', 'woocommerce'); ?></h4> <p class="form-field form-field-wide"> <label for="order_expiration_date"><?php _e('Expiration date', 'woocommerce'); ?></label> <input type="datetime-local" class="input-text" name="order_expiration_date" id="order_expiration_date" value="<?php echo esc_attr($expiration_date); ?>" /> </p> </div> <?php } add_action('woocommerce_admin_order_data_after_order_details', 'add_order_expiration_date_field'); //Save due date when updating order function save_order_expiration_date($order_id) { $expiration_date = isset($_POST['order_expiration_date']) ? sanitize_text_field($_POST['order_expiration_date']) : ''; update_post_meta($order_id, '_order_expiration_date', $expiration_date); } add_action('woocommerce_process_shop_order_meta', 'save_order_expiration_date'); // Function to handle custom query parameter'_order_expiration_date' function handle_custom_order_expiration_date_query( $query, $query_vars ) { if ( ! empty( $query_vars['_order_expiration_date'] ) ) { $query['meta_query'][] = array( 'key' => '_order_expiration_date', 'value' => esc_attr( $query_vars['_order_expiration_date']) , 'compare' => '=', ); } return $query; } add_filter( 'woocommerce_order_data_store_cpt_get_orders_query', 'handle_custom_order_expiration_date_query', 10, 2 ); // Test function to send an email function test_cron_mail() { // Define the custom query parameter '_order_expiration_date' $current_date_time = current_time( 'mysql' ); $args = array( 'status' => 'wc-completed', 'meta_query' => array( array( 'key' => '_order_expiration_date', 'value' => $current_date_time, 'compare' => '<', 'type' => 'DATETIME', ), ), 'posts_per_page' => -1, ); // Apply filter to handle custom query parameter add_filter( 'woocommerce_order_data_store_cpt_get_orders_query', 'handle_custom_order_expiration_date_query', 10, 2 ); // Perform order query $query = new WC_Order_Query( $args ); echo 'args: ';var_dump ($args) ; $orders = $query->get_orders(array(); echo 'orders: '; var_dump ($orders) ; // Delete the filter after performing the query remove_filter( 'woocommerce_order_data_store_cpt_get_orders_query', 'handle_custom_order_expiration_date_query', 10, 2 ); // Scroll through expired orders and take necessary actions foreach ( $orders as $order ) { $order_id = $order->get_id(); $billing_name = $order->get_billing_first_name(); $billing_email = $order->get_billing_email(); $subject = 'Hosting expired for ' . $billing_name; $message = 'Your hosting is expired. Please, contact us for further information.'; // Make sure the email address isválida antes de enviar el correo if ( is_email( $billing_email ) ) { wp_mail( $billing_email, $subject, $message ); } } } // Add cron task for test function add_action( 'init', 'schedule_test_cron_job' ); function schedule_test_cron_job() { // Set a 5 minute delay for the test cron task to run $timestamp = time() + 1 * 60; // Schedule the test cron task wp_schedule_single_event($timestamp, 'test_cron_job'); } add_action('test_cron_job', 'test_cron_mail'); I hope you can help me figure out where the error is.