So within the iCloud settings of my iPhone running 9.0.1 calendar is shown as turned on. When I go to the calendar app on my iPhone, none of the appointments I know are there are shown. Furthermore, when clicking calendars at the bottom of the calendar application none of my iCloud calendars are listed. I have tried turning calendars off and on again within settings, but to no avail. I'm not minded to sign out of iCloud altogether as it will be frustrating to add all my Apple Pay cards again, but will do if no one has any other suggestions.