September 20th 1966 was a Tuesday.
February 20, 1966 was a Sunday.
December 20, 1966 fell on a Tuesday.
March 20, 1966 fell on a Sunday.
It was a Wednesday.
It was a Sunday.
Thursday
20 September 1999 was a Monday.
September 20 1951 was a Thursday.
September 20 in 1969 was a Saturday.
September 20, 1993 was on a Monday.
20 September 1988 was on a Tuesday.
September 20 1952 was a Saturday.