L. Ron Hubbard Day is celebrated annually on March 13 to commemorate the birth of L. Ron Hubbard, an American science fiction author and the founder of Scientology. This holiday is observed primarily in the United States and is for individuals who appreciate Hubbard's writing or are interested in Scientology. Participants often engage in activities that honor his contributions, particularly his introduction of Dianetics, which he described as addressing psychosomatic ills and human aberrations. The day acknowledges Hubbard's impact on literature and the growth of Scientology as a worldwide organization. Inglewood, California, has officially declared March 13 as L. Ron Hubbard Day, recognizing his legacy with tributes from local officials.