In Parma there's an annual Towel Day gathering of fans of Douglas Adams. Details and RSVP on Facebook.
In Bellaria (Rimini), Towel Day will be observed at Sticcon, the Star Trek Italian Club Convention. "Don't Panic" towels will be sold for charity and the proceeds will be added to amount collected by other charity initiatives during the four day long convention. A set of 8 pictures, showing the 8 possible towel uses, will be enclosed with all towels. Details and RSVP on Facebook.