function twentynineteen_posted_on() {
    $time_string = '<time class="entry-date published updated" datetime="%1$s">%2$s</time>';
    if ( get_the_time( 'U' ) !== get_the_modified_time( 'U' ) ) {
      $time_string = '<time class="entry-date published" datetime="%1$s">%2$s</time><time class="updated" datetime="%3$s">%4$s</time>';
    }

    $time_string = sprintf(
      $time_string,
      esc_attr( get_the_date( DATE_W3C ) ),
      esc_html( get_the_date() ),
      esc_attr( get_the_modified_date( DATE_W3C ) ),
      esc_html( get_the_modified_date() )
    );

    printf(
      '<span class="posted-on">%1$s<a href="%2$s" rel="bookmark">%3$s</a></span>',
      twentynineteen_get_icon_svg( 'watch', 16 ),
      esc_url( get_permalink() ),
      $time_string
    );
  }