How do I change the language of moment.js?

Question

I am trying to change the language of the date which is being set by moment.js. The default one is English, but I want to set the German language. These is what I tried:

Answer 1

I'm using angular2-moment, but usage must be similar.

import { MomentModule } from "angular2-moment";
import moment = require("moment");

export class AppModule {

  constructor() {
    moment.locale('ru');
  }
}