Historical clue formulations

• People not to argue with, they say — 2026-06-05
• Tricks — 2019-07-12
• April 1 victims — 2011-09-26
• Jesters — 2010-02-22
• Nincompoops — 2002-05-22
• Mortals, to Puck — 2001-09-21
• April ___ Day — 1997-05-12
• Kind of gold — 1995-09-29
• See 6-Down — 1994-04-01
• Cons — 1994-03-09