Sunday.
December 20, 1966 fell on a Tuesday.
March 20, 1956 was a Tuesday.
That was on a Monday, also Chinese year of the horse.
tuesday
It was a Monday.
February 20, 1966 was a Sunday.
December 20, 1966 fell on a Tuesday.
It was a Wednesday.
It was a Sunday.
Thursday
September 20th 1966 was a Tuesday.
March 20 1964 was a Friday.
March 20 1989 was on a Monday.
March 20 1959 was a Friday.
March 20 1961 was a Monday.
March 20 1967 was on a Monday.
March 20 2009 was a Friday.