Add sales end date to sales badge in WooCommerce on child sites.
Snippet Type
Execute on Child Sites
Snippet
add_filter( 'woocommerce_sale_flash', 'wc_sale_end_date', 9999, 3 );
function wc_sale_end_date( $html, $post, $product ) {
if ( $product->get_date_on_sale_to() ) return $html . ' (ends ' . gmdate( 'd M', $product->get_date_on_sale_to()->getTimestamp() ) . ')';
return $html;
}