Friday.
9 March 1982 was a Tuesday.
June 9 1982 was a Wednesday.
December 9, 1982 fell on a Thursday.
9 April 1992 was a Thursday.
9 April 1964 was a Thursday.
9 April 1865 was a Sunday.
April 9 2007 was on a Monday.
April 9 1974 was a Tuesday.
April 9, 1912 was a Tuesday.
April 9 2010 was a Friday.
May 9th, 1982 was a Sunday.
That day was a Friday.