Historical clue formulations

• Register, to Brits — 2023-06-06
• Join the club, in Canterbury — 2017-01-14
• Register, as for a class — 2016-11-20
• Put on a list — 2015-07-11
• Opposite of drop out — 2015-07-02
• Sign up, to Brits — 2015-01-06
• Become a member: Var. — 2012-10-15
• Sign up — 2012-08-23
• Sign up — 2012-07-04
• Register, to a Brit — 2011-09-25
• Join — 2011-07-02
• Register — 2011-06-30
• Register — 2011-04-27
• Register — 2010-10-13
• Sign up — 2009-10-14
• Sign up — 2008-07-21
• Join up — 2007-11-25
• Register — 2007-09-14
• Register — 2007-05-19
• Join, with "in" — 2005-07-17
• Become a member — 2005-06-06
• Sign up — 2005-03-01
• Register — 2004-11-21
• Register — 2002-11-10
• Get on the list — 2002-07-20
• Register — 2002-05-29
• Get with the program? — 2002-04-20
• Sign up — 2001-07-29
• Register — 2001-06-09
• Join — 1999-07-24
• Sign up — 1999-07-21
• Take out membership — 1999-04-04
• Register — 1999-03-21
• Sign up — 1998-12-29
• Join — 1998-08-06
• Register, as for a course — 1998-07-06
• Volunteer — 1998-04-25
• Visit the registrar — 1998-03-10
• Register — 1998-03-07
• Register — 1997-12-12
• Sign up — 1997-12-11
• Register — 1997-09-19
• Press into service — 1997-06-06
• Matriculate — 1997-04-13
• Register, as a student — 1997-02-10
• Register — 1996-12-31
• Register — 1996-06-30
• Matriculate — 1994-09-10
• Matriculate — 1994-07-24
• Register — 1994-06-23