Historical clue formulations

• Frumpy loner, stereotypically — 2011-08-27
• One who's not the marrying type — 2006-04-07
• Bachelor's counterpart — 2001-12-17
• Bachelorette of a certain age — 1996-06-03
• Dickens's Miss Havisham, e.g. — 1995-10-28