Historical clue formulations

• Good thing to be in — 2023-09-14
• "Diligence is the mother of good ___": Benjamin Franklin — 2023-04-23
• Unfortunate thing to be out of — 2020-09-11
• "Preparation meeting opportunity," it's said — 2015-12-06
• Word that can follow the starts of 20-, 26-, 43- and 52-Across — 2012-08-20
• See 28-Down — 2011-05-23
• Gambler's need — 2002-12-24
• See 10-Down — 2000-10-18
• Game factor — 1996-01-27
• Gambler's need — 1995-07-31