Historical clue formulations

• The "N" of N.A.A.C.P.: Abbr. — 2026-08-18
• Part of N.A.A.C.P.: Abbr. — 2022-08-11
• N.B.A. starter?: Abbr. — 2019-07-27
• Part of NASA: Abbr. — 2018-04-15
• Like some monuments: Abbr. — 2017-09-29
• The "N" of N.F.L.: Abbr. — 2017-04-03
• The "N" in NASA: Abbr. — 2016-07-05
• NASA part: Abbr. — 2016-03-04
• Part of N.B.A.: Abbr. — 2015-02-10
• Part of 31-Down: Abbr. — 2014-10-21
• The "N" of N.A.A.C.P.: Abbr. — 2014-03-03
• NASA component: Abbr. — 2014-01-01
• N.B.A. part: Abbr. — 2013-03-03
• Mets' league: Abbr. — 2012-06-25
• Like some parks: Abbr. — 2012-03-11
• N.F.C. part: Abbr. — 2012-01-13
• Fed. — 2011-12-16
• Like some monuments: Abbr. — 2011-10-28
• NOW head?: Abbr. — 2010-11-06
• Part of N.F.L.: Abbr. — 2010-08-22
• N.L.R.B. part: Abbr. — 2008-10-28
• League heading: Abbr. — 2007-12-08
• The "N" of N.B.A.: Abbr. — 2006-07-24
• Part of NASA: Abbr. — 2006-07-13
• Like a certain govt. — 2005-05-08
• Amer. counterpart — 2005-04-26
• One of the major leagues: Abbr. — 2002-01-02
• Major League league: Abbr. — 2001-05-20
• Part of N.R.A.: Abbr. — 2000-12-18
• Abbr. in many org. names — 2000-08-17
• Part of N.F.L.: Abbr. — 1999-03-01
• Abbr. in many org. names — 1998-01-08
• Certain league: Abbr. — 1997-11-14
• One of the leagues: Abbr. — 1997-02-21
• Abbr. In many org. names — 1996-10-26
• A football conf. — 1994-11-05
• Part of NASA: Abbr. — 1994-06-08