/* ---------------------------------------------------------------------------
 * WYMUSZENIE SORTOWANIA ARTYKUŁÓW OD NAJNOWSZYCH (DESC)
 * --------------------------------------------------------------------------- */
function piechowiak_sort_blog_posts_desc( $query ) {
    if ( ! is_admin() && $query->is_main_query() && ( $query->is_home() || $query->is_archive() ) ) {
        $query->set( 'orderby', 'date' );
        $query->set( 'order', 'DESC' );
    }
}
add_action( 'pre_get_posts', 'piechowiak_sort_blog_posts_desc', 9999 );