Historical clue formulations

• Big success — 2026-08-05
• Accomplishment — 2026-04-26
• "OMG"-evoking deed — 2026-02-07
• Many a Guinness Book record — 2021-12-03
• Grand achievement — 2020-11-02
• Quite an accomplishment — 2019-12-26
• Abbr. between two singers' names — 2019-10-01
• Quite an accomplishment — 2019-09-09
• Herculean act — 2018-03-25
• Notable achievement — 2017-12-25
• Setting a world record, e.g. — 2017-09-17
• Daredevil's highlight — 2017-03-03
• Coup — 2017-02-10
• Breaking a world record, e.g. — 2014-07-10
• Quite an achievement — 2013-12-25
• It's impressive — 2012-10-02
• Impressive accomplishment — 2012-08-06
• Tour de force — 2012-06-03
• Guinness Book entry — 2012-03-14
• Exploit — 2011-10-19
• Grand slam, e.g. — 2011-04-17
• Quite an accomplishment — 2011-01-03
• Impressive act — 2010-10-11
• Accomplishment — 2008-08-25
• Juggling nine balls, e.g. — 2008-06-05
• Heroic deed — 2006-10-24
• Guinness entry — 2005-11-24
• Exploit — 2004-09-26
• Skillful act — 2004-01-01
• Many a Guinness listing — 2003-05-16
• Accomplishment — 2003-05-06
• Accomplishment — 2002-05-07
• Scoring a 10 in gymnastics, say — 2002-04-24
• Achievement — 2001-11-19
• Something to be proud of — 2001-11-15
• Bit of derring-do — 2001-02-08
• Coup — 2000-06-03
• Masterstroke — 1999-05-22
• Exploit — 1999-02-02
• Exploit — 1998-11-10
• Potential Guinness Book entry — 1996-12-31
• Achievement — 1996-12-25
• Achievement — 1996-06-17
• Guinness record, maybe — 1995-12-13
• Accomplishment — 1995-04-19
• Epic achievement — 1993-12-05