我有以d-m-Y格式存储的日期，我想显示今天之前的任何过去的帖子。

    $args = array (
        \'post_type\'=>\'property\',
        \'post_status\'=>\'publish\',
        \'posts_per_page\'=> 8,
        \'paged\'=> $paged,
        \'meta_query\' => array(
            \'key\' => \'auction_date\',
            \'value\' => date( \'d-m-Y\'),
            \'compare\' => \'<\',
            \'type\' => \'DATE\'
        ),
      );