title: Make jquery datepicker dates a different color every year on the same dates
body: <p>I want to make datepicker date cells a different color every year on the same dates.
  If the month is 12(December) and the days are 18 to 31.
  I do not want a specific date array that should be a different color.</p>
  
  <p>I have tried this:</p>
  
  <pre><code>beforeShowDay: function(date) {
        var day = date.getUTCDate();
        var month = date.getUTCMonth();
  
        return [!( (day == 17 &amp;&amp; month == 11) || (day == 18 &amp;&amp; month == 11) || (day == 19 &amp;&amp; month == 11) || (day == 20 &amp;&amp; month == 11) || (day == 21 &amp;&amp; month == 11) || (day == 22 &amp;&amp; month == 11) || (day == 23 &amp;&amp; month == 11) || (day == 24 &amp;&amp; month == 11) || (day == 25 &amp;&amp; month == 11) || (day == 26 &amp;&amp; month == 11) || (day == 27 &amp;&amp; month == 11) || (day == 28 &amp;&amp; month == 11) || (day == 29 &amp;&amp; month == 11) || (day == 30 &amp;&amp; month == 11) )];
  }
  </code></pre>
  
  <p>But this only disabled the cells. I do not want to have them disabled </p>