Historical clue formulations

• Burning — 2019-08-27
• On fire — 2017-11-28
• On fire — 2015-06-07
• Blazing — 2013-09-12
• Lit — 2010-12-31
• On fire — 2007-07-24
• Lit — 2005-07-22
• Burning — 2003-04-30
• Burning — 1997-03-16
• Burning — 1996-10-10
• Blazing — 1996-09-05
• Like some hearts — 1996-04-28
• Burning — 1995-11-02
• Fired up — 1995-03-16