Western dress codes
set of dress guidelines used in conjunction with Western dress for business and social occasions

Western dress codes are a set of dress codes detailing what clothes are worn for what occasion that originated in the Western world, particularly Western Europe and the United States, in the 19th century and which are rooted in Western culture. These codes have since been adapted to local contexts in non-Western cultures but are no longer considered Western there as a result.
History
Historical definitions
The background of traditional contemporary Western dress codes as fixed in 20th century relied on several steps of replacement of preexisting formal wear, while in turn increasing the formality levels of the previously less formal alternatives. Thus was the case with the ceasing of the justacorps, extensively worn from the 1660s until the 1790s, followed by the same fate of the 18th century frock (not to be confused with frock coat), in turn followed by the frock coat.
Full dress, half dress, and undress
Morning dress, white tie, black tie and dark suit have roots in 19th century customs subsequent to the replacement of the 18th century generic justaucorps, and has remained fixed defined since the 20th century. The 19th century frock coat rarely occurs except as formal alternative. For women, interpretations have fluctuated more dynamically according to fashion.
In the 19th century, during the Victorian and Edwardian periods, the principal classifications of clothing were full dress and undress, and, less commonly the intermediate half dress. Full dress covered the most formal option: frock coat for day wear, and dress coat (white tie) for evening wear (sometimes with supplementary alternative being a full dress uniform independent of what time of the day). As such, full dress may still appear in use designating formal wear.
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This entry incorporates text from “Western dress codes” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.