Add this snippet of code where you want the date to appear:

<script Language="JavaScript">
<!--
function GetDay(nDay)
{
	var Days = new Array("Sunday","Monday","Tuesday","Wednesday",
	                     "Thursday","Friday","Saturday");
	return Days[nDay]
}

function GetMonth(nMonth)
{
	var Months = new Array("January","February","March","April","May","June",
	                       "July","August","September","October","November","December");
	return Months[nMonth] 	  	 
}

function DateString()
{
	var Today = new Date();
	var suffix = "th";
	switch (Today.getDate())
	{
		case 1:
		case 21:
		case 31: 
			suffix = "st"; break;
		case 2:
		case 22:
			suffix = "nd"; break;
		case 3:
		case 23:
			suffix = "rd"; break;
	};

	var strDate = GetDay(Today.getDay()) + ", " + GetMonth(Today.getMonth()) + " " + Today.getDate();
	strDate += suffix + ", " + Today.getYear();
	return strDate
}
//-->
</script>
<script Language="JavaScript">
<!--
document.write("Today is " + DateString());
//-->
</script>