Question: When did Dean Paul Martin's father die?
Answer: December 25, 1995

Martin was the son of American entertainer Dean Martin. Dino Paul Crocetti (June 7, 1917 – December 25, 1995), known famously as Dean Martin, was an American actor, singer and comedian. One of the most popular and enduring American entertainers of the mid-20th century, Martin was nicknamed "The King of Cool" for his seemingly effortless charisma and self-assurance