Historical clue formulations

• Prosperous periods — 2025-10-13
• Opposites of busts — 2016-07-27
• Sounds made by supersonic planes — 2015-05-11
• Sail supports — 2013-01-20
• Sounds SSTs made — 2010-06-21
• Prosperous periods — 2002-10-23
• Certain mikes — 1997-05-06
• Good times — 1996-03-24