“After five attire” is attire you would wear to events taking place after 5 p.m. Events with suggested after five attire include post-work drinks, a date night or an evening wedding reception. After five attire can also be another term for semi-Formal or Smart Casual.
As of 2014, fashion websites such as Birds Nest and information sites such as About give examples of after five attire that include knee-length dresses or dress pants for women and a casual suit for men. Shoes for men should be business appropriate such as a wing-tip or an Oxford. Shoes for women may include sandals or heels.