This is the installation process of the extension:
Install the extension with the extension manager or composer
composer req lochmueller/calendarize
Include the static TypoScript configuration “Calendarize (calendarize)” in your TypoScript template
Create a new folder in your page tree, where you create events and related records like configuration groups.
Depending on your needs, create a TYPO3 page for event listing, event details and registration.
Include the plugin “Calendarize” and configure the plugin settings.
Configure extension TypoScript settings depending in your constant editor on your needs.