[Novice]

This would be a really cool feature, but only if you are on that server.
I doubt someone playing Unholy Nation would like to know that there's an event on Zone, and vice-versa. (This way would have to be scripted into the client, and not in an NPC script.)
But if you wanted this added for if you're playing on a server and want to know if that server is having an event, then yes, this could EASILY be scripted.