How do I upgrade MobileMe Calendar?
Sign in to me.com/calendar and make sure that your calendar data is up-to-date. In the lower-left corner, click “Upgrade now” as shown here: Note: MobileMe members who joined MobileMe after October 14, 2010 are already using the upgraded MobileMe Calendar service (no upgrade needed). Check this web page to be sure all your computers and devices are set up correctly.