We’ve noticed that our crowd estimates on the Crowd Calendar for the last few Grad Nights have been too low. On evenings when the Magic Kingdom closes early for special events such as Grad Nights we typically see diminished crowds during the day. We had predicted crowd levels of 4 and 5 for the last few Grad Nights but thanks to our dedicated Lines users we see that really, the crowds should have been more like a 6 or 7 on our scale.
We have made the necessary adjustments for days when the Magic Kingdom closes early in April and May.
Consider avoiding the Magic Kingdom when it hosts a special event. Afternoon crowds tend to be larger and the shortened park hours make completing a one-day touring plan more difficult.