dateBetween(end(prop("날짜")), start(prop("날짜")), "days") + 1 - (dateBetween(end(prop("날짜")), start(prop("날짜")), "weeks") * 2 + min(max(day(prop("날짜")) + dateBetween(end(prop("날짜")), start(prop("날짜")), "days") % 7 - 5, 0), 2))