The beta Ubuntu Touch Calendar app is more functional, and more like those of other smartphone OSes. There's no day or week view so far, though you can expose a scrolling appointment list (timeline) at the bottom of the screen for the current day. And so far, there is no way to create repeating events. But the app is unfinished: If you try to enter a time for a new event, the Cancel and OK buttons don't work, and you have to quit the app from the App screen.
If you tap the > icon to the right of the current month, the other months display so you can quickly jump to them. This hidden-menu mechanism is used in other apps as well.