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 (morning coat) before 6 p.m., and white tie (dress coat) after 6 p.m. Generally permitted other alternatives, though, are the most formal versions of ceremonial dresses (including court dresses, diplomatic uniforms and academic dresses), full dress uniforms, religious clothing, national costumes, and most rarely frock coats (which preceded morning coat as default formal day wear 1820s-1920s). 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 (and wedding gowns) likewise apply, changes in fashion have been more dynamic. Traditional formal headgear for men is the top hat, and for women picture hats etc. of a range of interpretations. Shoes for men are dress shoes, dress boots or pumps and for women heeled dress pumps. Other accessories such as gloves for men and opera gloves for women may be worn.
Formal wear being the most formal dress code, it is followed by semi-formal wear, equivalently based around daytime black lounge suit, and evening black tie (dinner suit/tuxedo), and evening gown for women. The male lounge suit and female cocktail dress in turn only comes after this level, traditionally associated with informal attire. Notably, if a level of flexibility is indicated (for example "uniform, morning coat or lounge suit", such as seen to the royal wedding of Prince Harry and Meghan Markle in 2018), the hosts tend to wear the most formal interpretation of that dress code in order to save guests the inconvenience of out-dressing.
Since the most formal versions of national costumes are typically permitted as supplementary alternatives to the uniformity of Western formal dress codes, conversely, since most cultures have at least intuitively applied some equivalent level of formality, the versatile framework of Western formal dress codes open to amalgation of international and local customs have influenced its competitiveness as international standard. From these social conventions derive in turn also the variants worn on related occasions of varying solemnity, such as formal political, diplomatic, and academic events, in addition to certain parties including award ceremonies, balls, fraternal orders, high school proms, etc.
Clothing norms and fashions fluctuated regionally in the Middle Ages.
More widespread conventions emerged around royal courts in Europe in the more interconnected Early Modern era. The justacorps with cravat, breeches and tricorne hat was established as the first suit (in an anarchaic sense) by the 1660s-1790s. It was sometimes distinguished by day and evening wear.
By the Age of Revolution in the Late Modern era, it was replaced by the previously causal country leisure wear-associated front cutaway dress coat around the 1790s-1810s. At the same time, breeches were gradually replaced by pantaloons, as where tricorne hats by bicorne hats and ultimately by the top hat by the 19th century and henceforth.
By the 1820s, the dress coat was replaced as formal day wear by the dark closed-front knee-length frock coat. However, the dress coat from the transition period was maintained as formal evening wear with white tie, remaining so until this day.
By the 1840s, the first cutaway morning coats of contemporary style emerged, which would eventually replace the frock coat as formal day wear by the 1920s.
Likewise, starting from the 1860s, fashion was further variegated by the gradual introduction of the sportive, shorter suit jacket, likewise originating in the country leisure wear. This evolved into the semi-formal evening wear black tie from the 1880s and the informal wear suit accepted by polite society from the 1920s.
The dress codes counted as formal wear are the formal dress codes of morning dress for daytime and white tie for evenings. Although some consider strollers for daytime and black tie for the evening as formal, they are traditionally considered semi-formal attires, sartorially speaking below in formality level.
The clothes dictated by these dress codes for women are ball gowns. For many uniforms, the official clothing is unisex. Examples of this are court dress, academic dress, and military full dress uniform.
The required clothing for men, in the evening, is roughly the following:
Women wear a variety of dresses. See ball gowns, evening gowns, and wedding dresses. Business attire for women has a developmental history of its own and generally looks different from formal dress for social occasions.
Many invitations to white tie events, like the last published edition of the British Lord Chamberlain's Guide to Dress at Court, explictely state that national costume or national dress may be substituted for white tie.
In general, each of the supplementary alternatives applies equally for both day attire, and evening attire.
Prior to World War II formal style of military dress, often referred to as full dress uniform, was generally restricted to the British, British Empire and United States armed forces; although the French, Imperial German, Swedish and other navies had adopted their own versions of mess dress during the late nineteenth century, influenced by the Royal Navy.
In the U.S. Army, evening mess uniform, in either blue or white, is considered the appropriate military uniform for white-tie occasions. The blue mess and white mess uniforms are black tie equivalents, although the Army Service Uniform with bow tie are accepted, especially for non-commissioned officers and newly commissioned officers. For white-tie occasions, of which there are almost none in the United States outside the national capital region for U.S. Army, an officer must wear a wing-collar shirt with white tie and white vest. For black tie occasions, officers must wear a turndown collar with black tie and black cummerbund. The only outer coat prescribed for both black- and white-tie events is the army blue cape with branch color lining.
Certain clergy wear, in place of white tie outfits, a cassock with ferraiolone, which is a light-weight ankle-length cape intended to be worn indoors. The colour and fabric of the ferraiolone is determined by the rank of the cleric and can be scarlet watered silk, purple silk, black silk or black wool. For outerwear, the black cape (cappa nigra), also known as a choir cape (cappa choralis), is most traditional. It is a long black woolen cloak fastened with a clasp at the neck and often has a hood. Cardinals and bishops may also wear a black plush hat or, less formally, a biretta. In practice, the cassock and especially the ferraiolone have become much less common and no particular formal attire has appeared to replace them. The most formal alternative is a clerical waistcoat incorporating a Roman collar (a rabat) worn with a collarless French cuff shirt and a black suit, although this is closer to black-tie than white tie.
Historically, clerics in the Church of England would wear a knee-length cassock called an apron, accompanied by a tailcoat with silk facings but no lapels, for a white tie occasion. In modern times this is rarely seen. However, if worn, the knee-length cassock is now replaced with normal dress trousers.
In Western formal state ceremonies and social functions, diplomats, foreign dignitaries, and guests of honor wear a Western formal dress if not wearing their own national dress.
Many cultures have a formal day and evening dress, for example:
Although ceased as a protocol-regulated required formal attire at the British royal court in 1936 at the order of the short-reigning King Edward VIII, the frock coat - embodying the background for all contemporary civil formal wear - has not altogether vanished. Yet, it is a rarity mostly confined to infrequent appearances at certain weddings.
Men in morning dress and women in wedding gowns at a wedding (1929)
Mustafa Kemal Atatürk in evening white tie formal wear (1925)
Queen Elizabeth II (in ball gown) and Prince Philip (full dress uniform) before the formal (full dress) opening of the Parliament of Canada (1957), surrounded by participators of varying degrees of formal attire (morning dress, white tie etc.), presumably in accordance with their functions or time of arrival and departure