It was a Wednesday.
September 9, 1964, was a Wednesday.
11 September 1964 was a Friday. November 9, 1964 was a Monday.
September 28, 1964 was a Monday.
1 September 1964 was a Tuesday.
September 17, 1964 was a Thursday.
September 4, 1964 was a Friday.
September 23rd 1964 was a Wednesday.
September, 13th, 1964, was a Sunday.
September, 5th, 1964, was a Saturday.
September 18th 1964 was a Friday.
September 10, 1964 fell on a Thursday.
September 6, 1964 fell on a Sunday.