Historical clue formulations

• Cover's opposite — 2015-12-20
• Unchanged or novel — 2008-02-28
• Fresh — 2007-06-22
• Fresh — 2007-06-09
• Something that gets copied — 2006-02-05
• KFC option — 2004-11-11
• Request at KFC — 2002-02-03
• One of a kind — 2001-02-25
• Not imitative — 1996-05-05