Aside from being a traditional location for hosting the National Day Parade (NDP), the old National Stadium also played host to numerous notable cultural and sports events, including those of the Malaysia Cup, where loud cheers and stamping of feet gave birth to the famous "Kallang Roar". The famous "Kallang Wave" is a type of Mexican wave that often took place in the old National Stadium during those games. Both the Kallang Roar and Kallang Wave are considered to be symbols of national unity. The 1973, 1983 and 1993 Southeast Asian Games used the old National Stadium as its ceremony venue.