Historical clue formulations

• Some Monopoly properties: Abbr. — 2026-08-25
• Baltic and Mediterranean: Abbr. — 2026-04-03
• Scientific classification for birds — 2026-02-28
• Street crossers: Abbr. — 2023-09-26
• Flying class? — 2020-05-17
• Class of fliers? — 2017-07-29
• Madison and Fifth in Manhattan: Abbr. — 2017-05-22
• D.C.'s New York and Pennsylvania — 2016-06-21
• Fifth and Park, in N.Y.C. — 2015-11-24
• Class of birds — 2015-11-06
• Birds, scientifically speaking — 2014-11-03
• Streets: Abbr. — 2014-03-17
• Madison and Fifth, e.g.: Abbr. — 2013-11-25
• Some Monopoly purchases: Abbr. — 2013-10-01
• Many Monopoly properties: Abbr. — 2013-06-19
• Mediterranean and Baltic, in Monopoly: Abbr. — 2012-10-23
• Ventnor and Baltic, in Monopoly: Abbr. — 2012-09-24
• Some Monopoly properties: Abbr. — 2012-06-17
• Upper class? — 2011-07-31
• Connecticut and Virginia, in Monopoly: Abbr. — 2010-07-13
• Birds, collectively — 2009-05-19
• Forum greetings — 2008-03-11
• Greetings of long ago — 2007-07-04
• Bird classification — 2007-05-10
• Pennsylvania and others: Abbr. — 2007-03-16
• Map parts: Abbr. — 2007-03-11
• Lex and Park, e.g., in N.Y.C. — 2007-01-02
• Class of birds — 2006-11-16
• Lexington and others, in N.Y.C. — 2006-10-05
• Fifth and Mad. — 2006-09-03
• Madison and Fifth, in N.Y.C. — 2005-07-11
• N.Y.C.'s 5th and 7th, e.g. — 2005-05-24
• Mad. and Lex. — 2005-01-30
• Birds, in Latin — 2004-09-18
• Park and Lexington, e.g., in N.Y.C. — 2004-06-01
• They sometimes have presidents' names: Abbr. — 2003-10-12
• Welcomes — 2003-09-07
• Prayers to Mary — 2003-07-03
• 2nd, 3rd, 4th, etc., in S.F. — 2003-05-08
• Class that's for the birds — 2002-09-10
• His, in old Rome — 2001-05-26
• 17 Monopoly props. — 1999-02-05
• Ancient greetings — 1996-12-04
• Pensylvania and Park, e.g.: Abbr. — 1996-06-17
• Fifth and Mad., e.g. — 1996-06-03
• Ancient greetings — 1996-05-10
• St. crossers — 1995-05-12
• Ancient greetings — 1994-12-30
• Former ova — 1994-09-01
• Lexington and Madison: Abbr. — 1994-06-06