Comment 63 for bug 849624

Sorry, one (fundamental) part of the trick was missing :)

You must first install apache on your local machine and enable dav support
then you create a local "web" calendar with lightning and you enable it also in evolution, so that Gnome Clock Applet show the same events and tasks of lightning (otherwise the trick does not make much sense)

If someone wants the details, I can give him/her