[FIXED] How filter posts by Year on Wordpress

Issue

How to filter posts by year, by a custom field?

$args = array(
    'post_type'   => 'movies',
    'showposts'   => '28',
    'meta_value' => array( 'release_date' =>  '2021-09-01', ),          );

Solution

You probably need something along the meta query lines: See WP_Meta_Query

$args = array(
              'post_type' => 'movies',
              'post_status' => 'publish',
              'posts_per_page' => -1,
              'orderby'   => 'release_date',
              'order'     => 'ASC',
              'meta_query'  => array(
                'relation' => 'AND',
                array(
                  'key'   => 'release_date',
                  'value'     => '2021-09-01',
                  'compare'   => '=',
                  'type' => 'DATE'
                ),
              )
            );

Answered By - Jamie_D