FullCalendar can be downloaded from it's website: https://fullcalendar.io/download/

from NPM:

$ npm install fullcalendar

from Bower:

$ bower install fullcalendar

or CDNJS:

//cdnjs.cloudflare.com/ajax/libs/fullcalendar/3.0.1/fullcalendar.min.js //cdnjs.cloudflare.com/ajax/libs/fullcalendar/3.0.1/fullcalendar.min.css //cdnjs.cloudflare.com/ajax/libs/fullcalendar/3.0.1/fullcalendar.print.css