Historical clue formulations

• "Headliner" of the first Warner Bros. short to win an Oscar — 2022-04-01
• Looney Tunes bird — 2015-10-04
• ___ Pie — 2001-11-24
• Looney Tunes regular — 2000-10-15
• Sylvester's would-be prey — 1996-07-05