Historical clue formulations

• High degree — 2023-01-28
• A certain degree — 2021-08-08
• Gets down cold — 2020-12-24
• High degree — 2003-12-12
• Annual sporting event, with "the" — 2001-11-01
• High degree — 2000-02-18
• Augusta golf tourney — 1998-03-17
• Postgraduate — 1996-11-09
• Annual golf tournament, with "the" — 1995-10-02