at time publish short_code

function shortcode_open_date_view($atts = '', $content = '') {
  $tz = new DateTimeZone('Asia/Tokyo');
  
  // get now
  $now = new DateTime('now', $tz);
  $format = 'Y-m-d H:i:s';
  
  // get argment
  extract(shortcode_atts([
     'open' => ''], $atts));
  
  // get argment open_date
  $open_date = DateTime::createFromFormat($format, $open, $tz);
  
  if ($now > $open_date) {
    // view contents
        
    // do shortcode in this shortcode
    $content_expand = do_shortcode($content);
    
    return $content_expand;
  } else {
    // not yet open date
    return '';
  }
}

add_shortcode('open_date_view', 'shortcode_open_date_view');