Historical clue formulations

• He literally jumped the shark on "Happy Days" — 2024-03-24
• 1970s-'80s TV character to whom the phrase "jumped the shark" originally referred — 2023-01-27
• 1970s TV cool dude, with "the" — 2017-07-16
• Epitome of cool, with "the" — 2016-02-25
• TV greaser, with "the" — 2014-05-29
• Epitome of cool, with "the" — 2013-08-25
• "Hey-y-y-y!" sayer of sitcomdom, with "the" — 2013-03-22
• TV character who jumped the shark, with "the" — 2009-11-04
• Old sitcom mechanic, with "the" — 2009-09-11
• Sitcom guy with a frequently upturned thumb, with "the" — 2008-10-24
• "Happy Days" cool cat, with "the" — 2008-02-04
• Winkler role, with "the" — 2007-07-04
• Henry Winkler role, with "the" — 2004-10-19
• 1970's TV character whose real first name was Arthur, with "the" — 2004-09-10
• 1970's-80's sitcom guy, with "the" — 2003-02-07
• Potsie's pal, with "the" — 2001-08-05