Historical clue formulations

• "Hasta la vista!" — 2022-05-23
• "I'm outta here!" — 2015-04-16
• "I'm outta here!" — 2013-12-16
• "S'long!" — 2003-08-16
• "So long" — 2001-07-17
• "Ciao!" — 2000-04-18