Wikipedia: Garment District, Manhattan
The Garment District, also known as the Garment Center, the Fashion District, or the Fashion Center, is a neighborhood located in the Manhattan borough of New York City. The dense concentration of fashion-related uses give the neighborhood its name. The neighborhood, less than 1 square mile (2.6 km2), is generally considered to lie between Fifth Avenue and Ninth Avenue, from 34th to 42nd Street. The neighborhood is home to the majority of New York’s showrooms and to numerous major fashion labels, and caters to all aspects of the fashion process from design and production to wholesale selling. The Garment District has been known since the early 20th century as the center for fashion manufacturing and fashion design in the United States, and even the world; no other city has a comparable concentration of fashion businesses and talent in a single district.
8 June 1972, New York (NY) Times, pg. 58:
Everybody - Well, Almost - Attended
A Mammoth Party on "Fashion Ave."
The party, marking not only a tribute to the apparel industry but spearheading a campaign to "make a big comeback for New York," was held on Seventh Avenue between 39th and 40th Streets.
In honor of the event, a joint undertaking of Mademoiselle magazine, which looked after the bills, and the City of New York, which coordinated permits and permission from the six civic departments involved in the planning, new street signs reading "Fashion Avenue" were also readied by the city. They will be placed underneath the Seventh Avenue signs by June 12.
28 June 1972, New York (NY) Times, pg. 51:
City Creates a Design for "Fashion Capital of World"
Plans for the first annual Fall Fashion Festival as part of a program to establish New York as the "fashion capital of the world" were outlined yesterday by Mayor Lindsay.
The Mayor will ask the City Council to rename Seventh Avenue from 34th Street to 42d Street Fashion Avenue.
29 September 1972, New York (NY) Times, pg. 51:
Mayor Lindsay toured the garment area, unveiled a sign temporarily renaming part of Seventh Avenue, "Fashion Avenue," and had lunch with leaders of the garment industry at The Daily News yesterday as the city began its first annual Fall Fashion Festival.