Hi Lee and thanks for checking out The Events Calendar PRO!
PRO itself does not have the capability for visitors to submit events to the calendar, but our Community Events plugin does. That provides a neat setting so that any event that is submitted by a visitors on the front end can be marked Draft or Pending Review on the back end for you to moderate and publish.
Is that what you are looking for? Let me know if I can help clarify anything here and I’d be happy to!
Geoff