Historical clue formulations

• Seinfeld's neighbor whose name is spoken as an epithet — 2016-07-18
• Seinfeld's "sworn enemy" — 2007-08-30
• Ms. Conehead player — 2005-10-11
• "Seinfeld" character — 2004-08-26
• "Nobody's Fool" star Paul — 2003-12-14