Historical clue formulations

• Common items at merchandise stands — 2021-05-07
• Tops — 2018-06-12
• Skins' opponent in a pickup game — 2016-11-01
• Side in a pickup game — 2011-07-24
• Polos, e.g. — 2011-06-22
• Tees, e.g. — 1996-06-01