Historical clue formulations

• Argon, krypton and xenon, informally — 2026-06-18
• Aristocrats — 2009-08-23
• Court figures — 2003-03-02
• Dukes and earls — 2003-01-21
• Court figures — 2002-10-27
• Lords and ladies — 2000-06-20
• English V.I.P.'s — 1996-04-28