Historical clue formulations

• 500 things in a ream — 2020-02-25
• What rain and paper towels may come in — 2014-08-26
• They're fit for kings and queens — 2012-04-29
• It may rain in these — 2010-01-24
• It may rain in these — 2008-03-29
• Some linen — 2006-11-12
• Some are fit for a king — 2005-12-03
• Some linens — 2005-04-04
• Closet supply — 2002-11-28
• See 5-Down — 1999-05-28
• Bed covers — 1998-04-27