JavaScript Date Comparison Date Difference Calculation
Example
To compare the difference of two dates, we can do the comparison based on the timestamp.
var date1 = new Date();
var date2 = new Date(date1.valueOf() + 5000);
var dateDiff = date1.valueOf() - date2.valueOf();
var dateDiffInYears = dateDiff/1000/60/60/24/365; //convert milliseconds into years
console.log("Date difference in years : " + dateDiffInYears);
