I've self-hosted my calendar using DAViCal (http://www.davical.org/ http://www.davical.org/) since I got my first iPod Touch. My wife and I use it to host share

I've self-hosted my calendar using DAViCal (http://www.davical.org/ http://www.davical.org/) since I got my first iPod Touch. My wife and I use it to host shared calendars that we access from our phones. I run it on a cheap box I own but it would be just as easy to host it on an inexpensive VPS. Backup is a Postgres dump taken daily stored locally on the server and rsync'd to two other machines in separate physical locations. It took a couple hours to set up but has been trouble and attention-free for years.