function Settings_update($event_name, $buildup_start_date, $event_start_date, $event_end_date, $teardown_end_date, $event_welcome_msg) {
  return sql_query("UPDATE `Settings` SET
      `event_name`='" . sql_escape($event_name) . "',
      `buildup_start_date`='" . sql_escape($buildup_start_date) . "',
      `event_start_date`='" . sql_escape($event_start_date) . "',