What year marked the introduction of the bikini swimsuit?

The introduction of the bikini swimsuit occurred in 1946, which is significant as it represented a major shift in fashion and societal norms surrounding swimwear and women's attire. This new style was designed by French designer Louis Réard, and it was named after the Bikini Atoll, where atomic bomb tests were conducted shortly before its introduction. The bikini was considered daring and provocative at the time, sparking conversations about femininity and body image.

Subsequently, the bikini gained popularity and has become one of the most recognized and enduring styles of swimwear in history. The other years listed do not coincide with its debut; therefore, they represent periods before or after significant developments in fashion, but none align with the actual moment the bikini first appeared to the public in 1946.