It was a Friday.
20th March in 1991 was a Wednesday.
20th September 1974 was a Friday.
20th September 2010 was a Monday.
September 20th, 1961 fell on a Wednesday.
Sunday.
It was a Tuesday.
September 17 1991 was a Tuesday.
September 20th 1966 was a Tuesday.
September 20, 1951 was a Thursday.
September 26th, 1991 fell on a Thursday.
September 6th, 1991 fell on a Friday.
September 20, 1967 fell on a Wednesday.