A class has 30 students what is the probability that nobody in the class have same birthday count one year as 365 days?

ok let's try this!

on any given date, probability that there is a student with a birthday is 30/365, so prob. that two students have that birthday is (30/365)^2. Tell me if I'm wrong, somebody!

So the problem that this does NOT happen is 1-(30/365)^2 which is 0.9932445...

I'm not sure about this next bit:

there are 365 days in which this probably won't occur, does that make a difference?