Question: What date did this television program start that has the opening and closing theme music was written by composer who was an American avant-garde composer, pianist, author and inventor and born July 8, 1900?
Related documents: [0]  [DOC] The Twentieth Century was a documentary television program sponsored by the Prudential Insurance Company that ran on the CBS network from 20 October 1957 until 4 January 1970. It was hosted by Walter Cronkite. The opening and closing theme music was written by composer George Antheil. The program presented filmed reports on news and cultural events that were important for the development of the 20th century. The show did not just present the events, but also interpreted them. Such subjects as World War I and major assassinations were presented in context. [END] 
[1]  [DOC] George Antheil ( ; July 8, 1900 – February 12, 1959) was an American avant-garde composer, pianist, author and inventor whose modernist musical compositions explored the modern sounds – musical, industrial, mechanical – of the early 20th century. [END] 
Answer: 
20 October 1957
20 October 1957