Add the plugin

Create a new content element on the page where the calendar should appear. In the tab Plugins choose Fullcalendar. All settings are in the tab Plugin, grouped in five sheets. All settings are described in the plugin settings reference.

Plugin tab General settings: column header, default view, all day slot, weekends, week numbers, time range

For a first calendar it is enough to select the event sources in the sheet Event Sources:

Plugin tab Event sources with Google calendar feeds, iCal feeds and calendarize storage pages

Select one or more Google calendar feed records or iCal feed records.
Optionally select the storage pages of EXT:calendarize.
Save and view the page.

If an event is clicked, a modal with its details opens:

Tip

Settings which are empty in the plugin are taken from the Site Set settings or TypoScript constants. That is why most of the plugin fields show Defined by TypoScript. See Defaults and overrides.