$u_time = get_the_time('U');
                    $u_modified_time = get_the_modified_time('U');
                    if ($u_modified_time >= $u_time + 86400) {
                        echo "and last modified on ";
                        the_modified_time('F jS, Y');
                        echo " at ";
                        the_modified_time();
                        echo ", "; }