title: Comparing years in highcharts
body: <p>I need to compare data (in hour or day) of 2 or 3 years in a same chart with the same period (only date, do not care about the year). They need to be overlapped to each others. I wonder if Highcharts supports this ? Because there are so many cases to be concerned like leap day, time shift...</p>
  
  <p>In the below example, I had tried to use two x-axises to display 2 series. But the display is not correct after the 29th Feb (the data of 29th-Feb 2016 will be compared with 1st-Mar 2015 which is unexpected)</p>
  
  <pre><code>xAxis: [{
                  type: 'datetime',
                  min: new Date('2016/02/22').getTime(),
                  max: new Date('2016/03/05').getTime()
  
              }, {
                  type: 'datetime',
                  min: new Date('2015/02/22').getTime(),
                  max: new Date('2015/03/06').getTime()
              }]
  </code></pre>
  
  <p><a href="https://jsfiddle.net/bernhard_kern/85s2fm5a/3/" rel="nofollow">https://jsfiddle.net/bernhard_kern/85s2fm5a/3/</a></p>