@dirvine mentioned that the Maidsafe preference is for things to be event driven.
But if the network preserves the relationships between events, so long as some of those events have hard times associated with them, such as a blockchain, it should be relatively easy to calculate the actual time of each event.
Of course, what we are really talking about is PRIORITY. If the relationships between events are preserved, then what do we care about the specific time of things. All that we care about is being able to prove that “File A was posted prior to File B.”