Historical clue formulations

• Only one of the Seven Dwarfs without a beard — 2021-01-01
• One of a Disney septet — 2016-11-23
• Dull-witted — 2016-07-30
• Youngest dwarf — 2016-07-20
• Idiotic — 2014-09-29
• Beardless dwarf — 2013-06-26
• Dwarf with a purple hat — 2011-12-18
• Lamebrained — 2010-10-27
• Only beardless Disney dwarf — 2009-03-25
• Only beardless one of the Seven Dwarfs — 2008-06-01
• A dwarf — 2006-10-19
• A bit stupid — 2005-01-04
• Stupid — 2003-02-21
• Thick — 2001-07-06
• Disney dwarf who "never had anything to say" — 1999-07-05
• The silent dwarf — 1995-10-04
• One of a familiar heptad — 1995-09-01
• Silent dwarf — 1995-05-05
• A bit obtuse — 1994-09-09