It was a Saturday.
20 December 1957 was a Friday.
October 20, 1957, was a Sunday.
November 20 1957 was a Wednesday.
20 April 1957 was a Saturday.
January 20, 1957 was a Sunday.
August 20, 1957 fell on a Tuesday.
Sunday
Monday
20, July, 1986, was a Sunday.
July 20 1973 was a Friday.
July 20 2010 was a Tuesday.
20 July 1997 was a Sunday.