query: # items that have or will have been gone for as long as they were there this month
  SELECT ?item ?itemLabel ?itemDescription ?start ?end ?daysThere ?daysGone ?dateWhereDaysThereEqualsDaysGone WHERE {
    ?item wdt:P571 ?start;
          wdt:P576 ?end.
    BIND(?end - ?start AS ?daysThere)
    BIND(FLOOR(NOW() - ?end) AS ?daysGone)
    FILTER(?daysThere > 0) # T186452
    BIND(?end + STRDT(CONCAT("P", xsd:string(xsd:integer(?daysThere)), "D"), xsd:duration) AS ?dateWhereDaysThereEqualsDaysGone)
    FILTER(YEAR(?dateWhereDaysThereEqualsDaysGone) = YEAR(NOW()) && MONTH(?dateWhereDaysThereEqualsDaysGone) = MONTH(NOW()))
    SERVICE wikibase:label { bd:serviceParam wikibase:language "[AUTO_LANGUAGE],en". }
  }
  ORDER BY ?dateWhereDaysThereEqualsDaysGone