Historical clue formulations

• "I'm off!" — 2025-05-10
• Departure announcement — 2018-04-14
• "Arrivederci!" — 2015-07-02
• "See ya!" — 2013-06-17
• Example of 41-Across — 2007-07-18
• "Sayonara!" — 2007-07-15
• "Bye now" — 2002-08-15
• "Toodles!" — 2000-11-21