Código PHP:
<SCRIPT LANGUAGE="JavaScript">
<!--
function getRemaining() {
today = new Date();
targetdate = new Date("December 25, 2001");
targetdate.setYear(today.getYear());
milliseconds = (5 * 60 * 60 * 1000);
remaining = ((targetdate.getTime() - today.getTime()) / milliseconds);
remaining = Math.round(remaining);
}
// -->
</SCRIPT>
<SCRIPT LANGUAGE="JavaScript">
<!--
getRemaining();
document.write("Faltan ",remaining," dias para la inaguracion!");
// -->
</SCRIPT>