Historical clue formulations

• Sits on a sill, as a pie — 2022-07-19
• Does gentle stretching post-exercise, with "down" — 2021-09-12
• Chills — 2020-08-09
• Loses enthusiasm — 2019-06-30
• Refrigerates — 2015-11-09
• Loses ardor — 2013-01-15
• Loses enthusiasm — 2009-11-13
• Refrigerates — 2007-07-16
• Puts on ice — 2004-08-24
• Becomes less enthusiastic — 2003-04-26
• Sits on a windowsill, say — 2002-11-17
• Loses heat — 2000-10-02
• Relaxes, with "down" — 2000-07-27
• Lets off some steam — 2000-02-20
• Chills — 1995-04-11