Historical clue formulations

• Home to Theo. Roosevelt Natl. Park — 2016-08-04
• State bordering Can. — 2014-12-11
• Fargo's home: Abbr. — 2013-07-15
• Neighbor of Sask. — 2012-06-24
• Mont. neighbor — 2012-02-22
• Fargo's state: Abbr. — 2012-02-14
• State south of Manitoba: Abbr. — 2011-10-04
• State straddling two time zones: Abbr. — 2011-07-03
• Fargo's home: Abbr. — 2010-11-01
• Neighbor of Sask. — 2010-04-25
• Intl. Peace Garden state — 2010-03-07
• Home of Theo. Roosevelt Natl. Park — 2009-05-17
• State whose tallest bldg. has only 19 floors — 2008-12-24
• Home of Grand Forks: Abbr. — 2008-11-19
• Locale of Sitting Bull Coll. — 2008-08-07
• Home of Theo. Roosevelt Natl. Park — 2007-08-31
• Sask. neighbor — 2007-01-28
• Theo. Roosevelt Natl. Park locale — 2006-09-29
• Bismarck's locale: Abbr. — 2006-09-05
• Bismarck's home: Abbr. — 2005-11-22
• Theo. Roosevelt Natl. Park site — 2005-11-20
• Fargo's state: Abbr. — 2005-01-05
• Bismarck's state: Abbr. — 2004-11-16
• Bismarck's state: Abbr. — 2004-10-25
• Garrison Dam's state: Abbr. — 2004-08-15
• Neighbor of Minn. — 2003-07-02
• Peace Garden State: Abbr. — 2003-06-08
• Fargo's state: Abbr. — 2002-09-16
• Sask. neighbor — 2002-09-12
• Can. borderer — 2002-03-21
• Fargo's locale: Abbr. — 2001-04-10
• Sask. neighbor — 2000-06-02
• Minn. neighbor — 1999-09-08
• Sask. neighbor — 1998-11-25
• Neighbor of Minn. — 1998-05-20
• Site of Theo. Roosevelt Natl. Park — 1997-12-26
• Site of Theo. Roosevelt Natl. Park — 1997-03-21
• State since 1889: Abbr. — 1997-01-25
• Bismarck's state: Abbr. — 1996-07-17
• Sask. neighbor — 1994-12-01
• Mont. neighbor — 1994-10-21
• Peace Garden State: Abbr. — 1994-10-12
• Neighbor of Sas. — 1994-10-06
• Minn. neighbor — 1994-09-29
• Minn. neighbor — 1994-07-06
• Minn. neighbor — 1994-06-04