There´s a festival from 19th to 25th this month. So if you set date to last week instead of using realtime tents on the rockets area (south apron) disappear. Maybe there are more features but that seems to be all. Editor does not allow many more fancy things. Other things could be added like some scheduled fireworks or whatever else but you can just basically add/remove effects or objects and link them to some variables (date in this case).
Cheers