Historical clue formulations

• Give the OK — 2025-07-29
• Sign off on — 2024-12-29
• Rubber-stamp, say — 2020-12-13
• O.K. — 2014-12-26
• Give the go-ahead — 2006-01-03
• Pass — 2002-08-03
• Say yes — 1998-04-10
• Say yes — 1996-12-06