The given date was a Saturday.
September 13 1962 was a Thursday.
September 13, 1986 fell on a Saturday.
September 13, 1968 was a Friday.
June 13th 1980 was a Friday.
It was a Tuesday.
September 13 1980 was a Saturday.
September 10 1980 was a Wednesday.
September 11 1980 was a Thursday.
29th September 1980 was a Monday.
September 21, 1980, was a Sunday.
September 23rd, 1980 fell on a Tuesday.
September 12, 1980 fell on a Friday.
September 15th, 1980 fell on a Monday.
September 19, 1980 fell on a Friday.
September 1, 1980 fell on a Monday.
September 8, 1980 fell on a Monday.
September 24th, 1980 fell on a Wednesday.