Availibility calendar need to show on node edit page.

Hi
Are you trying to get the calendar edit or calendar view to show on the node page?
If you're trying for the calendar edit then that will be more involved.
If you want the calendar view, you can use form_alter like so

function YOURMODULE_form_alter(&$form, $form_state, $form_id) {
  if ($form_id == 'hotel_room_type_node_form') {
    $node = $form['#node']';
    hotel_booking_inc('calendars'); // Load the calendars inc file
     $form['view_calendars'] = array(
        '#value' => hotel_booking_calendars_node($node),
        '#weight' => 10,
     );
  }
}

This code is untested, you may need to change the form id.