Historical clue formulations

• Window shades — 2026-04-20
• They might be drawn at night — 2018-08-31
• They're often pulled at night — 2017-06-11
• Aids to privacy — 2010-09-03
• They're often pulled at night — 1999-09-13
• Duck hunters' shelters — 1998-08-11
• Venetian assembly — 1995-12-23