Historical clue formulations

• Unexpected hit — 2016-03-22
• ... of 1973 — 2010-12-01
• One out? — 2006-05-26
• Rip Van Winkle, notably — 2006-02-28
• Surprise success — 2005-08-13
• Person in 39-Down — 2003-12-18
• Certain train car — 2003-11-27
• Surprise success — 2000-05-26
• Train car / Strips again — 1998-07-20
• Train car — 1995-05-10