Calendar issue


Hey guys!

I wanted to schedule my programs in advance because it helps me keep track of what I will be doing in these months. However, I cannot select September as my starting point for a program. What I mean is that when i browse through the calendar I can only see August and October, while September is just missing. This only happens when I choose a program and try to select a day in September I want to start it on. I don't know if it's a bug or I'm just doing something wrong, which could be possible ( this heat wave might have messed me up :P ).

Could someone help me? Thanks in advance guys :D