UBC Events is a great tool which lets event providers (UBC units, student associations etc.) publish their events into a central events calendar. It comes with tagging and various feeds that allow you to aggregate the content or publish content automatically on your own blog or website. The simplest use case is that you would like to follow a specific event provider or all events within a certain category. UBC Events works great for that!
Our requirement was a little more complex and unfortunately could not yet be met out of the box through UBC Events itself, at least I did not find the solution. However, with a powerful CMS such as Drupal, the functionality can easily be extended to meet other needs.