It was a Thursday.
its Monday September tenth
1 September 1970 was a Tuesday.
21 September 1970 was a Monday.
September 6, 1970 was a Sunday.
September 15th 1970 was a Tuesday.
September 17 1970 was a Thursday.
September 4, 1970 was a Friday.
September 2nd 1970 was a Wednesday.
September 8, 1970 was a Tuesday.
September 5, 1970 fell on a Saturday.
Wednesday
15 September 1970 was a Tuesday.