I need to order posts by custom meta box date field
$args = array(
'meta_key' => 'event_date',
'orderby' => 'meta_value_num',
'order' => 'ASC',
'post_status' => 'publish',
'post_type' => 'events',
'numberposts' => -1
);
$poslist= get_posts( $args );
I tried above code but its not working, date filed format is "yyyy-mm-dd"