Gonna have to disagree on this one. I think rather than it being one of the profile questions (I'm guessing thats what you mean) it should be something we ask someone directly... comment on their page, in person, etc.
Or have an actual "calender" of events, and not just a long list. Sometimes i can get overwhealmed with everything, and it just looks nicer on a cute calender, with a link to the actual event page.
Another thing that would be awesome is to have a personal calender/schedul dealio on the "My Page" Layout. It could be seen by the individual and his/her friends.