It was a Saturday.
06.09.1975 is June 9 1975, a Monday, in the US, and is 6 September 1975, a Saturday, in most other countries.
May 6, 1975 fell on a Tuesday.
it was a Thursday
It was a Thursday.
It Was a Monday
Sunday
Friday
September 6, 2011 was a Tuesday.
September 6, 1955 was a Tuesday.
September 6, 1970 was a Sunday.
September 6 1952 was a Saturday.
September 6 1929 was a Friday.