Historical clue formulations

• "This one's on me!" — 2026-09-08
• Nice thing to hear from one's dining partner — 2025-05-24
• "I've got this" — 2016-11-24
• Welcome words when a check arrives — 2011-12-10
• "I'll get this" — 2004-03-13
• "It's on me!" — 2003-10-06
• Title for this puzzle? — 2000-01-06