Historical clue formulations

• Home of Cheyenne: Abbr. — 2015-01-19
• Its motto is "Equal rights": Abbr. — 2014-11-02
• Cheyenne's home: Abbr. — 2012-05-28
• Mont. neighbor — 2011-01-06
• The Equality State: Abbr. — 2009-09-13
• Laramie's state: Abbr. — 2007-04-25
• Cheyenne's locale: Abbr. — 2004-05-03
• Neb. neighbor — 2001-10-07
• Casper's st. — 1994-08-28