Many months ago I used iCal and created a calendar titled "School" then I deleted it becuase I stopped using iCal. Today, I went in to creat new calendars and wanted to name one "School" and the application won't let me click enter and makes me choose another name such as "SchOOOl", or test, or any other characters besides "School" even though that calendar doesn't exist anymore. How can I title my calendar "School"?
I have this same question and I still haven't found a way to fix it using iCal, but if you go to icloud.com you can change it there and it will sync with iCal. Not really a fix but at least you can get around it.