You will need access to some postgresql database to use davical.

Read /usr/share/doc/www-apps/davical-${PV}/INSTALL.gz for installation
instructions.
Release notes are available at
http://wiki.davical.org/w/Release_Notes/${PV}.
Full documentation and wiki on http://davical.org

If you are upgrading from a previous version of davical, you must
set up the administration configuration file 
/etc/davical/administration.yml and run
	cd /usr/share/webapps/davical/${PV}/sqlscripts/
	./update-davical-database