December 17 1979 was a Monday.
December 17, 1979 fell on a Monday.
Monday
17 September 1979 was a Monday.
February 17, 1979, was a Saturday.
December 17, 1966 was a Saturday.
December 17 1775 was a Sunday.
December 17 1949 was on a Saturday.
December 17, 2007 was a Monday.
December 17 1943 was a Friday.
December 17 2010 was a Friday.
Wednesday
It was a Saturday.
Tuesday