Since the year of a film's release is usually also the year when reviews first appear, it is important to have at least a general idea of the release date. As there is generally a lapse of a month or more before indexing becomes available, when searching for reviews of recently released movies, search one or more years of an index. For example, for a movie released in September 1992, reviews might appear for both 1992 and 1993.

The following sources provide release dates for movies: