The Academy Awards are presented annually for the artistic achievements of the previous year. Unless otherwise notedm all dates referenced throughout the site refer to the year of awards eligibility (in most cases, the year the film was released), not the year in which the awards were presented (e.g. The 2022 Academy Awards will be held on March 22, 2023).
Additionally, from the Academy Awards' inception in 1927 until 1933, the awards' eligibility period did not match a calendar year. For this reason films that were nominated or won Oscars before 1934 indicate the eligibility period rather than the exact year of release. For example, Wings is listed as the Best Picture winner for 1927/28.
For the year 2020 only, the eligibility period was extended to February 28, 2021 due to the disruptions to the film industry caused by the COVID-19 pandemic.