title: How to show xAxis label in tooltip in a Highcharts area chart?
body: <p>I am using xAxis labels (not categories) to remove left/right paddings.</p>
  
  <pre><code>    xAxis: {
          //categories: data.categories
          labels: {
              formatter: function () {
                  return cat[this.value];
              }
          },
          minPadding: 0,
          maxPadding: 0
      },
  </code></pre>
  
  <p>In the tooltip, <code>{point.x}</code> shows me the number (eg. "0"), but I want the label (eg. "Jan").</p>
  
  <pre><code>    tooltip: {
          shared: true,
          useHTML: true,
              pointFormat: "{series.name}: {point.y:.0f} ({point.percentage:.1f}%)&lt;br /&gt;",
              headerFormat: "&lt;b&gt;{point.x}&lt;/b&gt;&lt;br&gt;&lt;br&gt;",
      },
  </code></pre>
  
  <p>How can I make it show the label?</p>
  
  <p><a href="http://jsfiddle.net/9tgjf82e/" rel="nofollow">http://jsfiddle.net/9tgjf82e/</a></p>