Customize the language and localization options for the calendar using lang option. If you are simply loading one language, you do not need to specify the lang option. FullCalendar will look at the most recent language file loaded and use it. However, if more than one language file is loaded, or the combined all.js file is loaded, you must explicitly specify which language to use via the lang option.

FullCalendar uses moment.js library to parse and display date and time. Moment.js library allows you to control different display formats: time, title, column and popover. This means you can adapt Fullcalendar to any locale and customize almost everything to your needs. The following example demonstrates different setups for time, column and title date/time formats in different view modes.