That entirely depends on what you mean by "a movie". "The Day of the Doctor" was the 50th Anniversary Special of Doctor Who and was made to be shown on television. It was, however, shown to mass audiences in cinemas (movie theatres), as well as being broadcast for home viewing. It also registered on official box office tallies for the day and week that it was shown. Its running time of 77 qualifies it as a feature-length film based on the criteria set out by the Academy of Motion Picture Arts and Sciences, American Film Institute and British Film Institute. However it does not meet the Screen Actors Guild criteria which requires a film to be 80 minutes in length (however, if one includes the running time of the two cinema-exclusive introductions, the one featuring Strax admonishing the audience about etiquette and the one where the Tenth and Eleventh Doctors discuss 3D, then it does exceed 80 minutes).