I have recently begun using Google Calendar for some of the musical groups I am involved with. There are some sharp edges, but I think it has some great potential.I set up a Google Calendar and shared it with all the student in the ensemble. I enter in the dates of rehearsals, concerts and other events. I include details of each event such as music we will be working on in a specific rehearsal or which pieces we will be performing at a concert. It is also possible to link to content such as YouTube recordings of important pieces of music. Students have access to this shared calendar so I envision the students taking ownership of the calendar.
As I play more with this I will keep you posted.
Andrew