Edit

Editing: ca.js

//! moment.js locale configuration

;(function (global, factory) {
   typeof exports === 'object' && typeof module !== 'undefined'
       && typeof require === 'function' ? factory(require('../moment')) :
   typeof define === 'function' && define.amd ? define(['../moment'], factory) :
   factory(global.moment)
}(this, (function (moment) { 'use strict';

var ca = moment.defineLocale('ca', {
        months : {
            standalone: 'gener_febrer_març_abril_maig_juny_juliol_agost_setembre_octubre_novembre_desembre'.split('_'),
            format: 'de gener_de febrer_de març_d\'abril_de maig_de juny_de juliol_d\'agost_de setembre_d\'octubre_de novembre_de desembre'.split('_'),
            isFormat: /D[oD]?(\s)+MMMM/
        },
        monthsShort : 'gen._febr._març_abr._maig_juny_jul._ag._set._oct._nov._des.'.split('_'),
        monthsParseExact : true,
        weekdays : 'diumenge_dilluns_dimarts_dimecres_dijous_divendres_dissabte'.split('_'),
        weekdaysShort : 'dg._dl._dt._dc._dj._dv._ds.'.split('_'),
        weekdaysMin : 'dg_dl_dt_dc_dj_dv_ds'.split('_'),
        weekdaysParseExact : true,
        longDateFormat : {
            LT : 'H:mm',
            LTS : 'H:mm:ss',
            L : 'DD/MM/YYYY',
            LL : 'D MMMM [de] YYYY',
            ll : 'D MMM YYYY',
            LLL : 'D MMMM [de] YYYY [a les] H:mm',
            lll : 'D MMM YYYY, H:mm',
            LLLL : 'dddd D MMMM [de] YYYY [a les] H:mm',
            llll : 'ddd D MMM YYYY, H:mm'
        },
        calendar : {
            sameDay : function () {
                return '[avui a ' + ((this.hours() !== 1) ? 'les' : 'la') + '] LT';
            },
            nextDay : function () {
                return '[demà a ' + ((this.hours() !== 1) ? 'les' : 'la') + '] LT';
            },
            nextWeek : function () {
                return 'dddd [a ' + ((this.hours() !== 1) ? 'les' : 'la') + '] LT';
            },
            lastDay : function () {
                return '[ahir a ' + ((this.hours() !== 1) ? 'les' : 'la') + '] LT';
            },
            lastWeek : function () {
                return '[el] dddd [passat a ' + ((this.hours() !== 1) ? 'les' : 'la') + '] LT';
            },
            sameElse : 'L'
        },
        relativeTime : {
            future : 'd\'aquí %s',
            past : 'fa %s',
            s : 'uns segons',
            ss : '%d segons',
            m : 'un minut',
            mm : '%d minuts',
            h : 'una hora',
            hh : '%d hores',
            d : 'un dia',
            dd : '%d dies',
            M : 'un mes',
            MM : '%d mesos',
            y : 'un any',
            yy : '%d anys'
        },
        dayOfMonthOrdinalParse: /\d{1,2}(r|n|t|è|a)/,
        ordinal : function (number, period) {
            var output = (number === 1) ? 'r' :
                (number === 2) ? 'n' :
                (number === 3) ? 'r' :
                (number === 4) ? 't' : 'è';
            if (period === 'w' || period === 'W') {
                output = 'a';
            }
            return number + output;
        },
        week : {
            dow : 1, // Monday is the first day of the week.
            doy : 4  // The week that contains Jan 4th is the first week of the year.
        }
    });

return ca;

})));