Hi Kim,
Great question!
I think the easiest way to do this is to take advantage of the Featured Events feature. In other words, you can create a recurring event that repeats the last week of every month, then select the “Featured Event” option in the Event Options box in the event editor (screenshot).
Enabling that will spotlight the event by making it a different color than other events and make it the first event in Month View.
Or, if you would prefer, you could go to the Events > Settings > Display screen and add custom text to the bottom of all calendar pages in the “Add HTML after event content” box at the bottom of the settings screen.
Does this help answer your question? Please let me know. 🙂
Cheers!
Geoff