Replacing repeating text on a page

Replacing repeating text on a page

I have a SharePoint page that is filled with the text string " 12:00 AM" that I would like to remove, the underlying HTML is
 
<td class="ms-cal-workitem">
  <table>
    <tr>
      <td class="ms-cal-monthitem">
        <nobr> <b> 12:00 AM<br/> Username here...
 
I would have thought that one of the following would have removed this text, but I haven't been successful...
 
$('#12:00 AM').text("");
$("#12:00 AM").text("");
$('12:00 AM').text("");
$("12:00 AM").text("");