I have an ical file on my webserver, shared via webdav... Since Sunbird isn't supported anymore, what are the alternatives, aside from Thunderbird+Lightning (which I'd like to avoid, since I use another mail program) ?
You can try Evolution, it was the default mail / calendar application before 11.10, and I'm still using it at work.
It support web calendars, and if you need, also Google Calendar. For example I upload my ICS file to my web space, I configured that ICS on Google Calendar, so I can see in Evolution and if I am not at my computer also with Google web interface.
It also as calendar events integration with the datetime indicator (the clock on right-top).
Click here to install: http://apt.ubuntu.com/p/evolution