13th October 1981 was a Tuesday.
13th September 1962 was a Thursday.
September 13th 1961 was a Wednesday.
September 13th, 1987, was a Sunday.
It was a Friday.
September 13th, 1971 fell on a Monday.
Friday
September 13th of 1983 fell on a Tuesday.
August 13th 1981 was a Thursday.
Wednesday
Tuesday
It was a Thursday.