Historical clue formulations

• Optimistic — 2021-10-05
• Fair forecast — 2020-10-18
• Optimistic — 2018-02-16
• Fair — 2015-04-04
• Bright — 2011-08-05
• Optimistic — 2010-11-18
• Cheerful — 2007-12-10
• Cheerful — 2007-08-08
• Bright — 2006-01-01
• Looking up — 2005-11-12
• Cheerful — 1998-07-24
• Cheerful — 1994-02-23