Historical clue formulations

• Spinks who defeated Muhammad Ali — 2026-04-27
• Revolutionary Trotsky — 2025-09-16
• Spanish province WSW of Bilbao — 2025-08-24
• R&B singer Bridges — 2024-07-17
• Soul singer Bridges — 2024-02-28
• Russian revolutionary Trotsky — 2023-07-03
• Kings of ___ ("Sex on Fire" quartet) — 2023-01-17
• Name hidden in "paleontology" — 2022-10-12
• Historic kingdom of Spain — 2022-05-06
• Revolutionary Trotsky — 2022-05-04
• Soul singer Bridges — 2022-02-27
• Rock's Kings of ___ — 2021-04-27
• Boxer Spinks who upset Muhammad Ali — 2021-02-15
• Soul singer Bridges — 2021-02-07
• Revolutionary Trotsky — 2020-10-06
• Nuevo ___ (Mexican state) — 2020-08-16
• Explorer Ponce de ___ — 2020-01-20
• Revolutionary Trotsky — 2019-09-05
• Rock's Kings of ___ — 2018-04-18
• Province of NW Spain — 2017-05-27
• Rock's Kings of ___ — 2016-11-24
• Spanish provincial capital — 2016-09-29
• Historic kingdom in Spain — 2016-08-04
• Nuevo ___, state in Mexico — 2015-11-15
• Czolgosz who shot McKinley — 2014-10-22
• Spanish province — 2014-09-28
• Former C.I.A. chief Panetta — 2014-04-20
• Spanish province or its capital — 2013-10-23
• Second-largest city in Nicaragua — 2013-08-10
• Kings of ___ ("Use Somebody" band) — 2013-07-24
• Rock's Kings of ___ — 2012-06-15
• Defense secretary Panetta — 2012-03-27
• Provincial capital NW of Madrid — 2011-04-29
• Winter air — 2010-09-02
• C.I.A. director Panetta — 2010-06-20
• Explorer Ponce de ___ — 2009-06-08
• Trotsky of Russia — 2008-07-29
• Nuevo ___, Mexican state bordering Texas — 2007-12-02
• Pugilist Spinks — 2007-10-14
• Province NW of Madrid — 2007-08-12
• Rock singer Russell — 2007-08-09
• Oil magnate Hess — 2007-06-01
• Ponce de ___ — 2007-05-28
• One of Emma's lovers in "Madame Bovary" — 2007-01-21
• Nicaragua's second-largest city — 2006-07-08
• Nuevo ___ (state in Mexico) — 2006-05-24
• Trotsky or Spinks — 2006-04-04
• Singer Redbone — 2006-01-01
• City NNW of Madrid — 2005-10-16
• Nicaragua's second-largest city — 2005-03-26