Historical clue formulations

• The swans in "The Twelve Days of Christmas," e.g. — 2024-09-22
• The deadly sins, e.g. — 2023-07-25
• The deadly sins, e.g. — 2020-11-22
• Group of seven — 2020-10-19
• Snow White's housemates, for instance — 2019-01-31
• The Harry Potter novels, e.g. — 2018-10-07
• Quidditch team, e.g. — 2018-07-24
• The deadly sins, e.g. — 2017-05-24
• Menorah's branches, e.g. — 2014-12-13
• The continents, e.g. — 2014-03-30
• Two trios plus one — 2012-08-06
• Seven-person band — 2008-11-17
• Snow White's dwarfs, e.g. — 2007-06-21
• The Pleiades, e.g. — 2006-09-09
• Many a swing band — 2005-09-04
• Beethoven work in E flat — 2005-04-03
• Chamber group, maybe — 2003-12-01
• Beethoven's Opus 20, e.g. — 1999-09-05
• Disney's Dwarfs, e.g. — 1997-02-11
• Band of seven — 1993-12-05