In the following table, the years are listed as per Academy convention, and generally correspond to the year of film release in Los Angeles County, California; the ceremonies are always held the following year. For the first five ceremonies, the eligibility period spanned twelve months from August 1 to July 31. For the 6th ceremony held in 1934, the eligibility period lasted from August 1, 1932, to December 31, 1933. Since the 7th ceremony held in 1935, the period of eligibility became the full previous calendar year from January 1 to December 31.