Historical clue formulations

• Possible answer to "Whose?" — 2025-01-30
• Nonbinary possessive — 2022-05-22
• Nonbinary pronoun — 2020-04-26
• His and hers — 2015-08-19
• Collection agcy. — 2005-09-09
• Not ours — 2003-02-18
• D.C. org. dropped from this puzzle...or what much of your money is — 1999-04-11