In general, we keep that huge summer block open on the holiday schedule because different things happen each year. :) Like others have pointed out, we've done EPICon, The Cruise, crazy digging with Blake, Peka-Boo, etc during the summer.

The holiday list is a list of things we for sure do every year (Alegarten, Morostide, etc). I don't think users would appreciate me adding WHOoOOooOOo KNOWSSSS on the list for summer, haha.