December 20, 1951 fell on a Thursday.
September 20 1951 was a Thursday.
July 20, 1951 fell on a Friday.
Tuesday
Saturday
It was a Tuesday.
October 20, 1951 was a Saturday.
September 20, 1951 was a Thursday.
20 December 1957 was a Friday.
December 20, 1955 was on a Tuesday.
December 20, 1982 was a Monday.
December 20, 1990 was on a Thursday.
December 20, 2009 was on a Sunday.