Year difference

gistfile1.txt

var now = new Date();
var birth = new Date(1986, 6, 10); // remember that we're using zero indexed months...

var yearDiff = now.getFullYear() - birth.getFullYear();
var monthDiff = now.getMonth() - birth.getMonth();
var dayDiff = now.getDate() - birth.getDate();
var hourDiff = now.getHours() - birth.getHours();
var minuteDiff = now.getMinutes() - birth.getMinutes();
var secondDiff = now.getSeconds() - birth.getSeconds();
var millisecondDiff = now.getMilliseconds() - birth.getMilliseconds();

yearDiff += monthDiff / 12;
yearDiff += dayDiff / (12 * 30);
yearDiff += hourDiff / (12 * 30 * 24);
yearDiff += minuteDiff / (12 * 30 * 24 * 60);
yearDiff += secondDiff / (12 * 30 * 24 * 60 * 60);
yearDiff += millisecondDiff / (12 * 30 * 24 * 60 * 60 * 1000);

console.log(yearDiff);