I have a query as follows:
$wp_query = new WP_Query( 'meta_key' => 'end_date', 'meta_value' => 'today', 'meta_compare' => '>=', 'post_type=vehicle' );
I want to show only those posts of the vehicle post type that have the meta key end_date which contains a date that is later than today's date.
How can this be accomplished?