Historical clue formulations

• Laughing — 2010-10-24
• Laughing — 2007-08-28
• Jocular — 2006-05-04
• Laughing — 2005-06-23
• Laughing — 2002-06-05
• Laughing — 2000-10-30
• Laughing — 1999-02-16
• Gleeful — 1999-01-03
• Smiling — 1998-11-29
• Pleasingly mirthful — 1997-03-24
• Gay — 1996-10-24
• Laughing — 1996-02-12