Historical clue formulations

• Comic's "thing" — 2019-12-05
• Routine — 2017-09-22
• Rodney Dangerfield's "I don't get no respect," e.g. — 2006-05-21
• "No respect," for Rodney Dangerfield — 1998-01-09
• Gimmick, in slang — 1997-03-22