Historical clue formulations

• One jumping to conclusions, say — 2013-08-19
• Ballerina, often — 2008-09-20
• Frog, at times — 2004-08-30
• One who's not out of bounds? — 2000-06-18
• Figure skater, at times — 1999-12-23
• One making rebounds — 1999-09-11
• Ballet dancer, at times — 1997-09-02
• Calaveras competitor — 1996-01-04
• Jumper — 1995-10-08