This research paper describes various aspects of the 12-day July Festival and period of preparation for it in one valley on the island of 'Ua Pou, Marquesas Islands, French Polynesia. This case study is of a well-delineated cultural event which exemplifies many themes presented in "Patterns of Social Interaction and Concepts of Interpersonal-Relating at Different Life-Stages in the Marquesas Islands." This July Festival is considered to be "of/for/by the young people" and is seen as a period in which the culturally valued aesthetic qualities of youth are put on display. These qualities include beauty, grace, sexual display, and skills in dancing and singing. This is a period of extreme social complexity and visibility during which social definition of work and life stage characteristics are explored and judged as appropriate or inappropriate. It is a time of both social experimentation and social stabilization. (EH)