A search function for events in the list view would be very useful. There are two main use cases for this:
1) Let's say I cannot remember when exactly a certain event happened or is planned,e.g. "Appointment at the garage to check car". With a search feature, one would just type "car" in the search box and all events with the keyword "car" are displayed in the events list.
2) I have an event which reoccurs on a not so regular basis, e.g. "Concert with my choir". So I could type "choir" and would get a list of all event which have "choir" in the event description.