WooCommerce: Add a Custom Notice Below the Order Review on the Checkout Page

If you need to add a custom notice below the order review on the checkout page of your WooCommerce site, add the following code to your functions.php file. Be sure to change the styling and text:

/* Add Notice Below Order Review on Checkout Page */
add_action( 'woocommerce_checkout_order_review', 'custom_order_notice_checkout', 15 );

function custom_order_notice_checkout() {
echo '<div style="padding: 10px; background: #ffe498; border: solid 1px #d49f0b; margin-bottom: 20px;">Shipping Delay: All orders placed through 7/11 will ship 7/12.</div>';
}