This is a cool demo, but why would someone want to have all these long running events on the screen at all times? It makes the UI cluttered and less clear what the next thing is you need to be doing. For example, do I really need the fact that I'm on vacation to be taking space at the side of the screen at all times? I'm not going to forget. This kind of design makes it easier for me to miss things I need to remember…
Good point. One solution I can think of would be to have a button or tab that would turn the longer running events on/off. You could also have the app only display the beginning and ending of an event when you zoom out past a certain point, say 3 days or so. In that situation, you could also use a vertical dotted line to connect the beginning and end, like with message board comments. Another thought would be to have those ongoing events snap to the top and bottom of the screen when you go into the individual day view.