gc-set-expiration-date-for-all-store-gift-cards

<?php
/**
 * Plugin Name: WooCommerce Gift Cards
 * Plugin URI: https://woocommerce.com/products/gift-cards/
 * Description: Use this snippet to set a specific expiration date for all gift cards created on your store
 * Version: 1.0
 * Author: WooCommerce
 * Author URI: https://woocommerce.com/
 * Developer: Jason Kytros
 *
 *
 * Copyright: © 2020 Jason Kytros
 * License: GNU General Public License v3.0
 * License URI: http://www.gnu.org/licenses/gpl-3.0.html
 */
 
 add_filter( 'woocommerce_gc_create_order_giftcard_args', 'sw_gc_set_custom_expiry_date', 10, 4 );

function sw_gc_set_custom_expiry_date( $args, $_product, $order_item, $order ) {
	$base            = 0 === $args['deliver_date'] ? time() : $args['deliver_date'];
	$base_datetime   = new DateTime();
	// year, month, date.
	$base_datetime->setDate( '2021', '10', '10' );
	$args[ 'expire_date' ] = $base_datetime->getTimestamp();

	return $args;
}