Historical clue formulations

• Break down chemically — 2021-01-21
• Steps on a scale — 2012-12-28
• Angle units — 2006-07-11
• Doctors have them — 2004-09-04
• College conferrals — 1998-02-25
• Scholar's collection? — 1995-11-18
• Master's and others — 1994-07-27