---
title: "What does it do?"
manual: "Fullcalendar"
version: "main"
permalink: "https://docs.typo3.org/permalink/mediaessenz/fullcalendar:what-does-it-do@main"
source: "Introduction/About/Index.rst"
rendered: "2026-10-25T19:39:52+00:00"
---

# What does it do? {#what-does-it-do}

The extension adds the content element *Fullcalendar* to TYPO3. It renders a
calendar with different views (month, week, day, and several list views) and
fills it from one or more event sources:

-   **Google calendar feeds** (records, need a Google Calendar API key)
-   **iCal feeds** (records, URL of an `.ics` file)
-   **EXT:calendarize** events (optional, selected by storage pages)

![The calendar in the frontend with the month view, a filter button and events from several sources](../../Images/FrontendCalendar.png)

## Features {#features}

-   Month, week, day and list views, switchable by visitors. The last chosen
    view is remembered in the browser.
-   A modal with the details of an event: description, duration, location
    (optionally with a link to Google Maps), organizer, an iCal download and
    buttons to the detail and booking pages of EXT:calendarize.
-   A [category filter](https://docs.typo3.org/permalink/mediaessenz/fullcalendar:filter@main) with groups of categories, so visitors can
    show and hide events. Their choice is remembered in the browser.
-   Colors per feed or per category.
-   Restriction of feeds and categories to frontend user groups.
-   Bootstrap 5 theme, configurable header and footer toolbar, time range,
    first day of the week, week numbers and more.
-   Settings can be defined for the whole site (Site Set settings or TypoScript
    constants) and overridden per plugin.

## How it works {#how-it-works}

The plugin outputs a container and the configuration of the calendar as JavaScript.
A small Vue 3 application, bundled with FullCalendar, mounts into the container.
Events from calendarize are loaded as JSON from a second plugin (a page type
`1738665709`), the other sources are loaded by FullCalendar
directly from Google or the iCal URL.

> [!NOTE]
> The Fullcalendar extension originates from the extension *me_google_calendar*
> and has been completely rewritten since. See the [change log](https://docs.typo3.org/permalink/mediaessenz/fullcalendar:changelog@main)
> if you update from an older version.