Historical clue formulations

• Grades — 2020-10-15
• Targets — 2018-02-23
• Targets of cons — 2015-12-20
• Report card report — 2015-02-04
• A, B, C, D and F — 2014-04-21
• A- and C+ — 2012-04-02
• Graffiti, say — 2009-10-10
• A, B and C — 2008-03-30
• Pre-euro German money — 2004-07-05
• Pre-euro German money — 2004-04-26
• Targets — 2000-10-05
• Foreign currency — 1999-02-14
• School grades — 1998-05-05
• Report card listing — 1996-05-26
• Grades — 1994-07-21
• 1,000 boats — 1994-01-16