Historical clue formulations

• Gets ready to eat? — 2022-11-16
• Becomes less green, say — 2022-11-10
• Gets redder, say — 2016-05-24
• Gets juicier, say — 2015-08-27
• Changes color, maybe — 2007-04-14
• Turns red, perhaps — 2007-01-17
• Matures — 1998-09-14