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The Calendar Base extension is a full-featured online calendar system that has been designed for expandability and interoperability with other extensions and programs, including popular calendar systems such as Yahoo! Calendar, Google Calendar, and Microsoft Outlook. In addition to these common calendar systems, Calendar Base is compatible with any other applications support the iCal standard data format.


|img-5| Important: As of January 2019 we are in the process to overhaul the complete extension in order to make it compatible with recent and upcoming TYPO3 versions. It would be wise to assume, that this documentation is outdated.

It is very likely that we missed existing features during our “make the extension work with TYPO 9 LTS approach”. Please help us to improve the extension as well as the documentation.

If you find a mismatch between functions described within this document and the extension itself, please check, if there is an coresponding issue already created at If that is the case, please enrich the ticket with all additional information you gathered. If you are unable to find a matching issue, please create a new one to let us know.

About this Manual

This guide is organized into five main sections:

  1. Overview: What the Calendar Base extension does, how it works, and what you can expect from the rest of the manual.
  2. Installation: How to install the Calendar Base extension and how to get it running on your website.
  3. Configuration: How to configure the Calendar Base extension and plugins for maximum impact on your website.
  4. Additional Options: Optional extensions that can enhance the Calendar Base extension’s usability.
  5. Advanced: How to modify the extension through TypoScript and other advanced functions.

How to use this Manual

To help make sense of the material on the following pages, we’ve used a few icons in the margin to highlight certain information.

|img-3| Tip : Tips are bits of information that are good to know. They may offer shortcuts to save you time or even make your website better.

|img-4| Note : These notes are similar to tips, but usually contain information you should pay attention to. It might be details about a step that a whole operation hinges on or it may highlight an essential sequence of tasks.

|img-5| Caution : These notes draw your attention to things that can interrupt your service or website if not done correctly. Some actions can be difficult to undo.

|img-6| Technical Stuff : These notes will explain how stuff works. If you want to know why certain steps are necessary or are just looking for a fuller explanation, these notes should help answer your questions.

|img-7| Internet Link : These links will guide you to a website page that will demonstrate How-To do something or link you to more advanced information on the or websites.