Simple Data picker meta box

No ones was answering so i installed this plugin MetaBox.io

and I’ve generated this code below that worsk very vell.

function arrivo_metabox( $meta_boxes ) {
  $prefix = 'arrivo-';

  $meta_boxes[] = array(
    'id' => 'arrivo',
    'title' => esc_html__( 'Data di arrivo in negozio', 'porto-child' ),
    'post_types' => array( 'riparazioni' ),
    'context' => 'side',
    'priority' => 'default',
    'autosave' => false,
    'fields' => array(
      array(
        'id' => $prefix . 'data_arrivo',
        'type' => 'date',
        'name' => esc_html__( 'Data arrivo in negozio', 'porto-child' ),
        'js_options' => array(
          'dateFormat' => 'dd/mm/yy',
          'dayNames' => '[ "Domenica", "Lunedì "Martedi", "Mercoledì", "Giovedì", "Venerdì", "Sabato" ]',
        ),
        'class' => 'data-arrivo',
      ),
    ),
  );

  return $meta_boxes;
}
add_filter( 'rwmb_meta_boxes', 'arrivo_metabox' );