title: X axis date format dygraph
body: <p>i am trying to format axis date data to make it show the year also but nothing happened i am using <code>dygraph-combined.js</code></p>
  
  <pre><code>document.getElementById("graphdiv"),
  
  // CSV or path to a CSV file.
  "Date,Temperature\n" +
  "2014-05-07,75\n" +
  "2014-05-15,70\n" + 
  "2014-05-23,80\n"+
  "2014-05-30,72\n" ,{ 
            axes: {
              x: {
                axisLabelFormatter: function(d, gran) {
                    return Dygraph.dateAxisFormatter(new Date(d.getTime() + 7200*1000), gran);
                }
              }
            }
          }
  );
  </code></pre>