Historical clue formulations

• Like St. Augustine, among all U.S. cities — 2018-03-25
• Guinness adjective — 2017-04-29
• Like Jackie Jackson, in the Jackson 5 — 2014-09-24
• Guinness Book superlative — 2014-02-26
• Like St. Augustine vis-à-vis all U.S. cities — 2013-11-04
• Senior — 2012-12-08
• Guinness superlative — 2012-02-02
• Guinness superlative — 2011-09-07
• Senior — 2011-08-21
• Having seniority — 2006-03-26
• Most elderly — 2004-02-16
• First-born — 2001-03-02
• Guinness adjective — 2001-02-14
• "The ___ trick in the book!" — 1998-03-23
• From furthest back — 1997-04-19
• Senior — 1996-11-15