Historical clue formulations

• Firstborn — 2026-01-19
• First in line, usually — 2023-10-28
• Like Meg among the March sisters — 2022-04-09
• Heir to the throne, as a rule — 2021-11-28
• Like Marcia, among the "Brady Bunch" daughters — 2021-10-01
• Like Liesl, among the von Trapp children — 2020-01-07
• First in line — 2019-11-22
• Source of hand-me-downs — 2019-08-04
• One with only younger siblings — 2018-06-11
• Firstborn — 2018-04-22
• Destined to inherit the throne — 2017-11-03
• Senior — 2016-12-24
• Rifts in the family, say — 2016-09-15
• First in line, in a way — 2015-08-27
• First in line, say — 2015-06-05
• Firstborn — 2014-02-25
• Born first — 2013-04-22
• First in line to the throne — 2011-12-20
• Cain, e.g. — 2011-03-11
• First in line, say — 2010-12-31
• Of greatest age — 2010-10-04
• Child often having special responsibilities — 2009-08-16
• First arrival — 2009-07-16
• Firstborn — 2007-12-09
• Like many an heir apparent — 2007-10-05
• Firstborn — 2007-10-01
• In position to inherit the throne, say — 2007-06-21
• Cain, for one — 2005-04-01
• First-born — 2004-08-10
• First-born — 2004-03-30
• Firstborn — 2003-11-27
• Heir to the throne — 2001-04-15
• Firstborn — 2000-07-05
• Firstborn — 2000-05-30
• Firstborn — 1998-07-27
• Meg, among the "little women" — 1998-01-11
• Tribal leaders, maybe — 1997-12-20
• Like a tribal leader, perhaps — 1996-08-10
• Cain, e.g. — 1995-08-27