A URL of a JSON feed that the calendar will fetch Event Objects from. FullCalendar will visit the URL whenever it needs new event data. This happens when the user clicks prev/next or changes views. FullCalendar will determine the date-range it needs events for and will pass that information along in GET parameters.

Customize the language and localization options for the calendar. This option affects many things such as: the text in buttons, as defined by header, text that contains month or day-of-week strings, date formatting strings, such as timeFormat, weekNumberCalculation, firstDay.

Determines the timezone in which dates throughout the API are parsed and rendered. false (default), 'local', 'UTC', a timezone string ('America/Chicago') Each of these possible values has an effect on (1) the way event data requests are made, (2) the timezones that event dates are represented in, and (3) the timezones that other dates in the API are represented in.