Moment.js – Get difference in two birthdays in years, months and days

You could get the difference in years and add that to the initial date; then get the difference in months and add that to the initial date again.

In doing so, you can now easily get the difference in days and avoid using the modulo operator as well.

Example Here

var a = moment([2015, 11, 29]);
var b = moment([2007, 06, 27]);

var years = a.diff(b, 'year');
b.add(years, 'years');

var months = a.diff(b, 'months');
b.add(months, 'months');

var days = a.diff(b, 'days');

console.log(years + ' years ' + months + ' months ' + days + ' days');
// 8 years 5 months 2 days

I’m not aware of a better, built-in way to achieve this, but this method seems to work well.