AdminLTE/plugins/fullcalendar/locales/nl.js

FullCalendar.globalLocales.push(function () {
  'use strict';

  var nl = {
    code: 'nl',
    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.
    },
    buttonText: {
      prev: 'Vorige',
      next: 'Volgende',
      today: 'Vandaag',
      year: 'Jaar',
      month: 'Maand',
      week: 'Week',
      day: 'Dag',
      list: 'Agenda',
    },
    allDayText: 'Hele dag',
    moreLinkText: 'extra',
    noEventsText: 'Geen evenementen om te laten zien',
  };

  return nl;

}());