Historical clue formulations

• Mart start — 2024-02-08
• Commercial lead-in to mart — 2020-08-20
• Retail store opening? — 2015-09-11
• Mart start — 2011-08-07
• Retail store opening? — 2006-09-13
• ___-Mart — 2005-03-22
• ___-Mart — 2003-05-17
• Retail store opening? — 2001-11-30
• Retail store opening? — 2001-06-23
• ___-Mart — 1999-09-24
• Opening of a retail store? — 1999-04-17
• ___-Mart — 1997-03-28