Install davical by entering the following commands in the terminal:
sudo apt update sudo apt install davical
Description:
PHP CalDAV and CardDAV Server
The DAViCal CalDAV Server is designed to store CalDAV calendars and CardDAV addressbooks, such as those from Evolution, Sunbird/Lightning, Mulberry, iCal, iPhone or SOHO Organizer, in a central location, providing shared calendars, free/busy publication and a basic administration interface.
Homepage: https://www.davical.org/
Version: 1.1.7-1
Section: universe/web