That was on a Monday, also Chinese year of the horse.
February 20, 1966 was a Sunday.
The day of the week that June 20 is on depends on the year it is. In 2011, June 20 is on a Monday.
December 20, 1966 fell on a Tuesday.
It was a Wednesday.
It was a Sunday.
Thursday
Sunday.
September 20th 1966 was a Tuesday.
20 June 1958 was a Friday.
June 20 1961 was a Tuesday.
June 20 1935 was a Thursday.
June 20, 1964 was a Saturday.