Step 1: Go to your
Calendar list, Edit page and add Script Editor Web Part to it.
Step 2: Paste the
below code to Script Editor Web Part
Code:
<script
type="text/javascript"
src="http://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.8.3.min.js"></script>
<script
type="text/javascript">
$(function(){
//append text
var originText=$(".ms-acal-today").find("nobr").text();
$(".ms-acal-today").find("nobr").text(originText+"Today");
//change the background
$(".ms-acal-today").css("background-color","yellow");
});
</script>
