Historical clue formulations

• Words after "happily ever after" — 2025-12-03
• "That's it" — 2022-01-02
• Song by the Doors that, paradoxically, is heard at the start of "Apocalypse Now" — 2020-04-22
• "Well, that's that!" — 2020-01-26
• With 39-Across, doomsayer's assertion ... or a phonetic hint to 18-, 24-, 51- and 61-Across — 2018-10-01
• "Done" — 2012-03-09
• "Period!" — 2011-11-30
• Finis — 2011-02-20
• Finis — 2008-02-25
• "No more" — 2007-02-23
• Book closing — 2003-12-07
• Famous last words? — 2001-06-27
• Famous last words — 2001-04-29
• Finis — 2001-01-18
• Famous last words? — 1997-12-16
• Last frame, sometimes — 1997-05-14
• Words preceding film credits — 1994-08-24