title: HighCharts show datetime format on xAxis
body: <p>I am trying to display dateTime in day/weekly/month format on the x axis of high charts I have the data formatted as x utc date time format and y (magnitude). I was under the impression I only need to do this for it to work</p>
  
  <pre><code>Highcharts.chart('container', {
    title: {
      text: 'Chart with time'
    },
    xAxis: {
      type: 'datetime',
      dateTimeLabelFormats: {
        day: "%e. %b",
        month: "%b '%y",
        year: "%Y"
      }
    },
    series: [{
      data: [
        [1493326164493, 100],
        [1493326194018, 120]
      ]
    }]
  });
  </code></pre>
  
  <p>What am I doing wrong? I have posted a fiddle link below for my scenario</p>
  
  <p><a href="https://jsfiddle.net/dLfv2sbd/" rel="noreferrer">https://jsfiddle.net/dLfv2sbd/</a></p>