September 12, 1958, was a Friday.
It was a Thursday.
Saturday.
Sunday DQ
The given date was a Thursday.
Saturday http://www.timeanddate.com/calendar/?year=1958&country=1
15th September 1958 was a Monday.
28 September 1958 was a Sunday.
1 September 1958 was a Monday.
14 September 1958 was a Sunday.
September 13 1958 was on a Saturday.
September 25 1958 was a Thursday.
27 September 1958 was a Saturday.