$wpdb->insert splits my date after i formated

Hi so here is the script that you would think would work out of the box.

function ajax_away_dates() {
    global $wpdb; // this is how you get access to the database
  $bookonline = $wpdb->prefix . "book_online";
  $dateedit = $_POST['data'];
  $date=date("Y-m-d",strtotime($dateedit));
  $wpdb->insert(
    $bookonline,
    array(
        'allday' => 1,
        'appiontmentdate' => $date
    ),
    array(
        '%s',
        '%d'
    )
);

//  $wpdb->query("INSERT INTO $bookonline ('allDay','appiontmentdate') SET ('1','$dateedit')");
print $wpdb->last_query;
  return $wpdb->print_error();  /*$whatever += 10;

        echo $whatever;
  */
    wp_die(); // this is required to terminate immediately and return a proper response
}

and the jquery

function senttocalserver(d){
      jQuery.post(
      ajaxurl,
      {
          'action': 'calendaradd',
          'data':   d
      },
      function(response){
          alert('The server responded: ' + response);
      }
      );
    }

URL encodes like

action=calendaradd&data=2015-12-7

But what happens is it stops after 2015 see below

The server responded: INSERT INTO `zo_book_online` (`allday`, `appiontmentdate`) VALUES ('1', 2015)0

please help

via Chebli Mohamed