Claim: Six Flags Fiesta Texas opened in 1992 and was called Fiesta Texas and operates all year-round.
Evidence: The park was built by Gaylord Entertainment Company and opened on March 14, 1992, as the first business in the district of San Antonio. Six Flags Fiesta Texas, formerly known simply as Fiesta Texas, is an amusement park located in La Cantera, San Antonio, Texas. Year-round 
March 14, 1992; 28 years ago (1992-03-14) Fiesta Texas (1992-1995) Year-round