It was a Saturday.
November 20th, 1976 was a Saturday.
November 17, 1965 was a Wednesday.
Wednesday
It was a Thursday.
Tuesday
20th of August 1965 was a Friday.
September 20th 1965 fell on a Monday.
September 20th, 1965 fell on a Monday.
20th November 1970 was a Friday.
20th of November 2010 will be a Saturday.
In 1965 Father's Day was on 20th June in the US.
Yes, just once. The 11th of November was a Thursday in 1965.