title: meta_query between two date in wordpress not working
body: <p>I tried <strong>meta_query</strong> but not working.</p>
  
  <p>Need post data between particular date 2016-01-01 to 2017-01-01 but not working my code is :</p>
  
  <pre><code>$args = array( 
       'post_type' =&gt; 'post',
      'order' =&gt; 'ASC',
      'orderby' =&gt; 'title',
      'category' =&gt; array( 7, 11, 463, 409 ),
      'post_status' =&gt; array('publish'),  
      'posts_per_page' =&gt; -1,
       'meta_query' =&gt; array(
          array(
              'key' =&gt; 'post_date',
              'value' =&gt; array("2016-01-01", "2017-01-01"),
              'compare' =&gt; 'BETWEEN',
              'type' =&gt; 'DATE'
          )
      )
      );
  </code></pre>