Historical clue formulations

• Kahlúa and cream over ice — 2012-11-11
• A Mexican might sleep under it — 2011-08-10
• Speedy Gonzales wear — 2006-08-16
• Shade maker for a siesta — 2005-02-15
• Hat dance hat — 1999-10-11
• Tijuana topper — 1999-07-26
• Mariachi topper — 1999-01-14
• Hat for a siesta — 1996-11-04
• Pedro's hat — 1995-08-21