Historical clue formulations

• City that lends its name to a style of omelet — 2025-05-01
• Where Quiznos and Mapquest are headquartered — 2015-10-18
• Where Chipotle was founded and is headquartered — 2015-06-13
• Censure — 2013-08-25
• Where I-25 and I-70 meet — 2008-02-22
• Setting for part of Kerouac's "On the Road" — 2006-08-13
• Six Flags Elitch Gardens city — 2005-01-09
• Stapleton Airport site — 1997-02-03