Moment.js, a JavaScript date library for parsing, validating, manipulating, and formatting dates, packaged for Meteor.
Thses packages use the offical momentjs:moment
Meteor package.
To add a specific locale user
meteor add rzymek:moment-locale-pl
The complete list of locales can be obtained by
meteor search rzymek:moment-locale-.*
To add all locales use:
meteor add rzymek:moment-locales
Note that locale specific package implies the core 'momentjs:moment', so you don't need to add it yourself.
Just like the moment docs tell you:
var now = moment();