title: How to format datetime for (x,y) pair data for Highcharts
body: <p>My serialization method results a datetime string like this: "2014-07-09T12:30:41Z"</p>
  
  <p>Why the following code does not work?</p>
  
  <pre><code>$(function () {
  $('#container').highcharts({
      xAxis: {
          type: 'datetime'
      },
  
      series: [{
          data: [
              {x:"2014-07-09T12:30:41Z",y: 29.9},
              {x:"2014-09-09T12:30:41Z", y:71.5}
          ],
          name: "Teste"
      }]
  });
  </code></pre>
  
  <p>});</p>
  
  <p>this code work perfectly:</p>
  
  <pre><code>$(function () {
  $('#container').highcharts({
      xAxis: {
          type: 'datetime'
      },
  
      series: [{
          data: [
              {x:Date.UTC(2014, 0, 1),y: 50},
              {x:Date.UTC(2014, 2, 1), y:20}
          ],
          name: "Teste2"
      }]
  });
  </code></pre>
  
  <p>});</p>
  
  <p>How to convert datetime format or configure highcharts to work with my data?</p>