Saturday
December 20, 1966 was a Tuesday!
December 20, 1966 fell on a Tuesday.
It was a Thursday.
December 21, 1966 was a Wednesday.
December 29th, 1966 fell on a Thursday.
December 17, 1966 was a Saturday.
December 2, 1966 fell on a Friday.
December 15, 1966 fell on a Thursday.
December 7, 1966 fell on a Wednesday.
December 11, 1966, was a Sunday.
Monday.
Friday