Claim: In the 1981 Australian Touring Car Championship, two race titles, named "Adelaide" and "Surfers Paradise" (where the 3.219 kilometer circuit was designed and built by Keith Williams), were held during the month of May.
Evidence: Adelaide 3 May Surfers Paradise 17 May The 3.219 kilometres (2.000 mi) long circuit was designed and built by Keith Williams, a motor racing enthusiast who also designed and built the Adelaide International Raceway (AIR) in South Australia in 1972.