I was looking at doing something similar a while ago, but, at the same time, (and this is weird to say after my last comment), I don't understand what you're doing.
Ok, it's a shared calendar, that I get (or I think that's what it is).
A demo video would be great, but going from your screenshots (in order)
1) Ok, nice clean calendar, it shows me my events. Did I create all of those? Was I invited to? Who else is going? Have I RSVP'd? I'm a bit lost here. I'm sure the colored dots mean something, but I don't know what. Now, I'd know if I created an event, but how about showing me if anybody else is going. That would probably be nice.
2) I think this is a peer's profile. Cool that it shows how many friends we have in common, and that we have friends, classes and events in common. WOAH, classes?? What if I'm not in school? Is a class just a repeated event? Why is that different from another type of event. This could use some work. Can I send a message directly to my peer?
3)Comments or Feed?? I thought it was comments about a single event at first, but now I'm thinking it's a feed, because I think it is referring to multiple classes. Again, classes is limiting your market, but ignoring that, you could do with some visual layout to show that the comment belongs to x event better. Look at Facebook's nested comments.
The last two screens are OK, again, Class or Work may not make sense to everybody, the less decisions a person needs to make the better.
On the last page "Invite friends", am I inviting them to an event or to use the app?
Hope the feedback helps.
Off to a good start, keep up the good work.