title: ChartJS - Draw chart with label by month, data by day
body: <p>I'd like to draw a line chart by <a href="http://www.chartjs.org/">Chartjs</a> with data by day, but label by month.</p>
  
  <p>If label is displayed by day, then there are a lot of points. So, I'd like to display label by month instead of by day. For example:</p>
  
  <p><img src="https://i.stack.imgur.com/XFsY3.png" alt="enter image description here"></p>
  
  <p>Someone could teach me how to do that?</p>
  
  <p>Thank you.</p>