title: WordPress query shows no posts
body: <p>I use the ACF plugin and I create a page with a date picker for a start and end date.</p>
  
  <p>Now I want to show all posts between these dates, but it doesn't work. My code looks something like this:</p>
  
  <p>
  
  <pre><code>$start = get_field('start', 124);
  $end = get_field('end', 124);
  
  $args = array(
      'date_query' =&gt; array(
          array(
              //'column' =&gt; 'post_modified_gmt',
              'after'     =&gt; $start,
              'before'    =&gt; $end,
              'inclusive' =&gt; true,
          ),
      ),
  );
  $query = new WP_Query( $args );
  </code></pre>
  
  <p>Does someone know what's wrong? Thanks for your help.
  The form of the date is always F j, Y.</p>