With iOS 5, you can use iCloud service to sync your calendar on iOS devices. After configuring iCloud calendar on my Mac and iPad 2, I really needed it on my android phones. Here is a tutorial about how to setup icloud calendar on android phone for syncing.
* Unfortunately, you can’t set up the Calendar with the basic email application. But we can’t try other methods.
* SmoothSync for Cloud Calendar is a android app syncing your iCloud calendars automatically. Once you enter account ID and password, it creates new calendars from your iCloud account on your device. The app supports multiple iCloud accounts, time zone, and syncs multiple alarms. Hoping the reminder syncing comes soon.