Historical clue formulations

• Neighbor of Colo. — 2026-08-21
• Scottsbluff's state: Abbr. — 2025-11-20
• Only U.S. state with a unicameral legislature: Abbr. — 2024-05-18
• Corn Belt state: Abbr. — 2023-06-18
• State in Tornado Alley: Abbr. — 2021-07-21
• Kan. neighbor — 2021-01-10
• Bird's beak — 2020-09-09
• Mo. neighbor — 2018-12-21
• Lincoln's home: Abbr. — 2018-05-13
• Home to Bellevue U. — 2016-04-09
• Bird's beak — 2016-03-16
• Tornado Alley state: Abbr. — 2015-02-01
• Tortoise's beak — 2013-07-20
• Omaha's home: Abbr. — 2013-04-22
• S. Dak. neighbor — 2013-04-09
• It's S. of S. Dak. — 2013-01-06
• Ia. neighbor — 2011-09-11
• Beak — 2011-08-30
• Neighbor of Colo. — 2011-07-10
• Home of Agate Fossil Beds Natl. Monument — 2011-03-20
• Wyo. neighbor — 2009-11-08
• Lincoln's home: Abbr. — 2008-12-09
• Home of Creighton U. — 2008-07-26
• Grain Belt state: Abbr. — 2008-04-02
• It's south of S.D. — 2008-03-25
• Cornhusker State: Abbr. — 2007-12-04
• Homestead Natl. Monument locale — 2006-12-03
• Okla. rival — 2006-11-02
• Wyo. neighbor — 2006-10-29
• Colo. neighbor — 2006-06-11
• It's south of S.D. — 2006-03-06
• Cornhusker State: Abbr. — 2005-03-08
• Omaha's home: Abbr. — 2004-01-12
• Cornhusker's state: Abbr. — 2003-12-24
• Midwest state: Abbr. — 2003-06-19
• Pen tip — 2003-05-25
• Omaha's state: Abbr. — 2002-12-16
• Colo. neighbor — 2001-10-11
• Colo. neighbor — 2001-01-04
• S. Dak. neighbor — 2000-11-30
• Kan. neighbor — 1999-08-18
• Bird's bill — 1997-10-22
• Okla. football rival — 1997-03-02
• Lincoln's state: Abbr. — 1996-12-10
• Bird's beak — 1996-04-11
• Lincoln's home: Abbr. — 1995-12-14
• Neighbor of Colo. — 1995-10-17
• Woodpecker's tool — 1995-05-24
• Beak — 1995-05-13
• Wyo. neighbor — 1995-03-26