Highlighting today's date in a calendar

Hi, thanks for the reply.
I’m sorry, but I’m not sure what you mean by “Find the code that is rendering the cell and if the year, month and day match add a class.”
Do you mean the html code? Here’s the html code that I’m using -

<div id="calendar-container"> <div id="calendar-header"> <span id="calendar-month-year"></span> </div> <div id="calendar-dates"> </div> </div>
So I’m not sure where to put td.className = 'today';