I'm trying to get a timer to count down to a date by days and I don't know why this isn't working it just says NaN

```js
function daysUntil24thApril2016() {
  var april2016 = new Date(24, 4, 2016);
  var difference = april2016.getMilliseconds - Date.now().getMilliseconds;
  return difference / 1000 / 60 / 60 / 24;
}

$(document).ready(function() {
  console.log("asdasd")
  $('#dateTime').text(daysUntil24thApril2016());
});
```