At first you should update your version to 3,2,0 latest snapshots. (It wasn't implemented in initial version) And use developers sample (read wiki about how to start examples) to check the new possibilities.
Ok, thanks for the reply!
I tried with the latest sample but it does not works correctly.The calendarDataModelItem does set the style class for a given day but it fails to render them correctly on the screen.
Any help on this will be useful. If need i can post sample war file also.