How to get movies by date

To be able to query on your dates beyond a simple date comparison you should reverse the format of your date field. Dates should always follow the MySQL date format for reliable querying and sorting: YYYY-MM-DD HH:MM:SS

To query movies for today you would use a meta query:

$args = array(
    'posts_per_page' => '-1',
    'post_type' => 'movie',
    'meta_key' => '_date_key',
    'meta_value' => date('Y-m-d'),
    'meta_compare' => '='
);

$todays_movies = new WP_Query( $args );