ever wondered how to directly subscribe to a calendar on your iphone, e.g. our mDEAsydney calendar?
look no further than your iPhone’s settings > mail, contacts, calendar > add account > other > add subscribed calendar
alternatively, adding subscribed calendars is also possible from within iTunes. however, adding them directly on your iphone instead has the benefit of instant updates independently of your next sync via itunes.
more detailed information available here.