title: json date format to Highcharts date format
body: <p>Could please someone guide me how to get such json object datetime</p>
  
  <pre><code> {
      value="01/01/2013 08:00", 
      key=5.5
   }
  </code></pre>
  
  <p>to javascript (to use in Highcharts) datetime acceptable format </p>
  
  <pre><code>[Date.UTC(2013, 0, 1,08,00), 5.5].
  </code></pre>
  
  <p>UPDATE</p>
  
  <p>Here is what I'm trying to do:</p>
  
  <pre><code>var chart;
  
  $(document).ready(function () {
  
      chart = new Highcharts.Chart({
          chart: {
              renderTo: 'container',
              zoomType: 'x'
          },
          yAxis: {
              type: 'double',
              min: 0
          },
          xAxis: {
              type: 'datetime',
              labels: {
                  formatter: function () {
                      return Highcharts.dateFormat('%a %d %b %H:%M', this.value);
                  },
                  dateTimeLabelFormats: {
                      minute: '%H:%M',
                      hour: '%H:%M',
                      day: '%e. %b',
                      week: '%e. %b',
                      month: '%b \'%y',
                      year: '%Y'
                  }
              }
          },
          series: [{
              name: 'MyData1',
              data: []
          }, {
              name: 'MyData2',
              data: []
          }]
  
      });
  
      chart.series[0].setData([
          [Date.UTC(2013, 0, 1, 08, 00), 4.4],
          [Date.UTC(2013, 0, 1, 12, 00), 6.0],
          [Date.UTC(2013, 0, 1, 17, 00), 7.7],
          [Date.UTC(2013, 0, 1, 22, 00), 5.8]
      ]);
      chart.series[1].setData([
          [Date.UTC(2013, 0, 1, 08, 30), 0.4],
          [Date.UTC(2013, 0, 1, 10, 00), 0.0],
          [Date.UTC(2013, 0, 1, 16, 00), 0.7],
          [Date.UTC(2013, 0, 1, 20, 00), 0.8]
      ]);
  });
  </code></pre>
  
  <p><a href="http://jsfiddle.net/karin/waBck/" rel="noreferrer">here</a> is it in jsFiddle.</p>
  
  <pre class="lang-cs prettyprint-override"><code>var datatype1=[];
  var datatype2= [];
  
      for(index in userReadingsJsonCollection.items){
            if(userReadingsJsonCollection.items[index].ReadingsData.Reading_Type==type1){
                  datatype1.push( 
  [Date.parse(userReadingsJsonCollection.items[index].ReadingsData.Rec_DateTime),
                  userReadingsJsonCollection.items[index].ReadingsData.Reading]
                  );
              }
            if(userReadingsJsonCollection.items[index].ReadingsData.Reading_Type==type2){
                  datatype2.push(
                  [userReadingsJsonCollection.items[index].ReadingsData.Rec_DateTime,
                  userReadingsJsonCollection.items[index].ReadingsData.Reading]              
                  );
              }
      }
  </code></pre>
  
  <p>The result I get is [[1357027200000,5.5]] and this works great.</p>