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?