As Austin's official slogan is The Live Music Capital of the World,[1] the city has a vibrant live music scene with more music venues per capita than any other U.S. city. Austin's music revolves around the many nightclubs on 6th Street and an annual film/music/multimedia festival known as South by Southwest. The city also has a burgeoning circle of live performance theater venues such as: Zachary Scott Theatre Center, Vortex Repertory Company, Salvage Vanguard Theater, Arts on Real, Scottish Rite Children's Theater, Hyde Park Theatre, and the Esther's Follies comedy & magic show which has been operating for over 3 decades now. The longest-running concert music program on American television, Austin City Limits, is videotaped on the University of Texas at Austin campus. Austin City Limits and Capital Sports & Entertainment run the Austin City Limits Music Festival, an annual music and art festival held at Zilker Park in Austin. The long-running outdoor musical, the Zilker Park Summer Musical expects to celebrate its 50th anniversary in 2008. The Urban Music Festival is held during the Texas Relays weekend every April. Other annual events include Eeyore's Birthday Party and the Austin Reggae Festival (previously named Bob Marley Festival) in April and Carnaval in February. Halloween, the two Mexican independence days (Cinco de Mayo and El 16 de Septiembre), St Patrick's Day, Mardi Gras, July 4th, and Juneteenth (Emancipation Day) are all widely celebrated. First Thursday is a popular festival which takes place the first Thursday of each month.