title: Change background color of a specific a day in a jquery datepicker
body: <p>I want to know how to set background color on the dates in a <code>datePicker</code>; I followed a lot of tutorials but I didn`t get any result.</p>
  
  <p>I have this datePicker:</p>
  
  <pre class="lang-html prettyprint-override"><code>&lt;div id="datepicker"&gt;&lt;/div&gt;
  </code></pre>