Dress code

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Western dress codes and corresponding attires
Formal (full dress)   White tie  Morning dress  Full dress uniform Frock coat  Evening gown  Ball gown
Semi-formal (half dress)   Black tie  Black lounge suit   Mess dress uniform Evening gown  Cocktail dress
Informal (undress, "dress clothes") Suit  Service dress uniform Cocktail dress  Pantsuit
Casual (anything not above) Business casual Casual Friday Combat uniform Smart casual Workwear Streetwear Sportswear known as Sportswear (fashion) and Athleisure Undress
Supplementary alternatives Ceremonial dress law courts royal courts diplomatic academic, etc. Religious clothing cassock, habit, etc. Folk costume Distinctions Orders medals, etc.
Legend: = Day (before 6 p.m.) = Evening (after 6 p.m.)     = Bow tie colour = Ladies = Gentlemen Fashion portal
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A dress code is a set of rules, often written, with regard to what clothing groups of people must wear. Dress codes are created out of social perceptions and norms, and vary based on purpose, circumstances, and occasions. Different societies and cultures are likely to have different dress codes, Western dress codes being a prominent example.

Dress codes are symbolic indications of different social ideas, including social class, cultural identity, attitude towards comfort, tradition, and political or religious affiliations. Dress code also allows individuals to read others' behavior as good, or bad by the way they express themselves with their choice of apparel.^[2]

Because dress codes are unwritten and unspoken, some neurodivergent people have difficulty understanding, finding, shopping for, and dressing appropriately to the codes of the event.