I got a question for you: On August 23, 1994, the United States Congress, by Pub. L. 103 -- 308, designated December 7 of each year as National Pearl Harbor Remembrance Day. On Pearl Harbor Day, the American flag should be flown at half-staff until sunset to honor those who died as a result of the attack on U.S. Military and naval forces in Hawaii.

Answer this question: when did pearl harbor day become a holiday?
Let's think first:
The important part for answering this question is: On August 23, 1994, the United States Congress, by Pub. L. 103 -- 308, designated December 7 of each year as National Pearl Harbor Remembrance Day.
Therefore, the answer is August 23 , 1994.