Formal wear, formal attire or full dress is the traditional Western dress code category applicable for the most formal occasions, such as weddings, christenings, confirmations, funerals, Easter and Christmas traditions, in addition to certain state dinners, audiences, balls, and horse racing events. Formal wear is traditionally divided into formal day and evening wear; implying morning dress before 6 p.m., and white tie after 6 p.m. Generally permitted other alternatives, though, are the most formal versions of ceremonial dresses, full dress uniforms, religious clothing, national costumes, and most rarely frock coats. In addition, formal wear is often instructed to be worn with official full size orders and medals.
The protocol indicating particularly men's traditional formal wear has remained virtually unchanged since the early 20th century. Despite decline following the counterculture of the 1960s, it remains observed in formal settings influenced by Western culture: notably around Europe, the Americas, South Africa, Australia, as well as Japan. For women, although fundamental customs for formal ball gowns likewise apply, changes in fashion have been more dynamic.