I need to get from Rome to either Gavorrano or Grosseto on June 12, but it seems that is one of the only days where the usual intercity or direct trains are unavailable to book. I've looked at Trenitalia, Italo and other options, but don't see anything.
Is there a reason this day is unavailable? I saw something about schedules changing around June 14, but why would the 12th be unavailable?