Historical clue formulations

• Implausible argument, say — 2021-04-24
• Prison sentence — 2018-10-02
• Something to do immediately after waking up — 2017-01-10
• Warm up before exercising — 2015-10-20
• Exhibit plasticity — 2015-02-21
• Overextend oneself? — 2013-12-08
• Recover from a nap — 2011-07-30
• Seventh-inning ritual — 2009-07-20
• Pre-workout ritual — 2007-05-23
• Time for one doing time — 2005-01-20
• Duration — 2003-02-01
• Part of a pitch — 2001-09-05
• Start calisthenics — 1996-01-29
• Seventh-inning ritual — 1995-06-25
• Exaggerate — 1995-01-28
• Seventh-inning activity — 1994-06-30