我像这样解决了同样的问题，首先将每个帖子存储在另一个名为$events_by_date 以日期为索引。如果另一个事件帖子出现在同一日期，则将该帖子放在同一索引下。

如果需要进一步解释，请发表评论。

  <?php
//setup your wp_query parmeters to make the query

$calendar_results   =   new WP_Query( $wp_query_params );

$events_by_date = array();


     while ( $calendar_results->have_posts() ) : $calendar_results->the_post(); 
        //$date_group =  strtotime($calendar_results->post->post_date);
        $date_group = strtotime(date(\'Y-m-d\',$date_group));
        $events_by_date[$date_group][] = $calendar_results->post;
    endwhile;

global $post;


foreach($events_by_date as $date_heading=>$rows) {

    echo \'<h2 class="published-date">\',
            ucfirst( strftime( \'%A %d %b\',$date_heading ) ) ,
    \'</h2>\';

    foreach ($rows as $post ) {
        setup_postdata($post) ;
        get_template_part( \'content\', $template ); 
    }


}   

wp_reset_query();

只需像这样使用WP\\u查询：

$posts_by_date_field = new WP_Query(array(
    \'post_type\'         => \'POST_TYPE_NAME\',
    \'posts_per_page\'    => -1,
    \'meta_key\'          => \'FIELD_NAME\',
    \'orderby\'           => \'meta_value\',
    \'order\'             => \'DESC\'
));


if ($posts_by_date_field->have_posts()) : while ($posts_by_date_field->have_posts()) : $posts_by_date_field->the_post();

    // LOOP

endwhile; endif;