The Yard turns into a ghost town after Commissioning Day, 22 May this year. NASSters, summer campers, summer school midshipmen, mids there for various other training blocks will be in and out -- but a whole class of a 1000+ has stepped over into Gold Bar land, and the remaining 3 classes have scattered. That's why when everyone comes back after major leave periods, it's "Reform of the Brigade." Post-commissioning day up to I-Day is one of the quietest times of the year.
Only parades during the summer are plebe practice parades and one for the parents during PPW.
Memorial Day weekend -- usually no special events planned. Faculty and staff enjoy a federal holiday, unless the schedule calls for the holiday Monday to be a class day for summer schoolers or other training.