The most flexible way to access UICalendar on your iPhone is still to use Safari on the iPhone to use the UICalendar web client. However, other ways of using UICalendar from the iPhone are getting a lot better now. By far the easiest way is to import your UICalendar calendar into iCal on the your iOS device. This gives you everything, including alarms. The only thing that is missing is that you can't enter new events on the iPhone and upload them to UICalendar. Importing your UICal calendar into iCal requires at least iOS 3.0. The instructions on how to subscribe your iOS device to UICalendar are below.
There are other ways to use UICalendar on the iPhone that do give you two-way sync. Two-way means that it syncs both ways -- brings changes from UICal to iCal on the iPhone and changes from iCal to UICal.)
You must be connected to the Internet to do this. Create a subscription link using UICal Utilities. This link is one way -- data comes down from UICalendar only. Any changes you make in iCal on the the iPhone will not be transferred back to UICalendar.
No authentication is needed and alarms are synced, but you can't change when they will go off from the iPhone.
August 06, 2013