Also in May is the Lilac Festival which honors the military, celebrates youth, and showcases the region. Spokane's nickname, the "Lilac City", refers to a flowering shrub that has flourished since its introduction to the area in the early 20th century. In June the city hosts Spokane Hoopfest, a 3-on-3 basketball tournament, among the largest of its kind. One of Spokane's most popular local events is Pig Out in the Park, an annual six-day food and entertainment festival where attendees may eat a variety of foods and listen to free live music concerts featuring local, regional, and national recording artists in Riverfront Park. The Spokane International Film Festival, held every February, is a small, juried festival that features documentaries and shorts from around the world. The Spokane Gay & Lesbian Film Festival, held every November, features contemporary, independent films of interest to the GLBT community. Other notable events in the Spokane region include the Spokane County Interstate Fair, Japan Week, Spokane Pride Parade and the Lilac City Comicon. The Spokane County Interstate Fair is held annually in September at the Spokane County Fair and Expo Center in Spokane Valley. Japan Week is held in April and celebrates the sister-city relationship with Nishinomiya, Hyogo, demonstrating the many commonalities shared between the two cities. Students from the Spokane campus of Mukogawa Fort Wright Institute, Gonzaga, Whitworth, and other area schools organize an array of Japanese cultural events. The gay and lesbian Spokane Pride Parade is held each June. There is an annual Renaissance fair and Civil War reenactment as well. Serving the general educational needs of the local population are two public library districts, the Spokane Public Library (within city limits) and the Spokane County Library District. Founded in 1904 with funding from philanthropist Andrew Carnegie, the Spokane Public Library system comprises a downtown library overlooking the Spokane Falls and five branch libraries. Special collections focus on Inland Pacific Northwest history and include reference books, periodicals, maps, photographs, and other archival materials and government documents. Spokane Public Schools (District 81) was organized in 1889, and is the largest public school system in Spokane, and the second-largest in the state, as of 2014, serving roughly 30,000 students in six high schools, six middle schools, and thirty-four elementary schools. Other public school districts in the Spokane area include the Mead School District in north Spokane County, outside city limits. A variety of state-approved, independent charter schools and private and parochial elementary and secondary schools augment the public school system.