Historical clue formulations

• Humdingers — 2021-01-04
• Lollapaloozas — 2018-06-02
• Humdingers — 2018-02-19
• Doozies — 2014-11-10
• Real corkers — 2014-06-23
• Real doozies — 2014-01-13
• Humdingers — 2010-04-25
• Beauts — 2008-07-24
• Humdingers — 2006-03-14
• Doozies — 2001-12-24
• Whoppers — 2000-10-31
• Eye-openers — 1999-08-29
• Doozies — 1997-12-01
• Dillies — 1996-06-17
• Dillies — 1993-12-25