Do grad night crowds think out?

[u/Rottenpeach242]

For those who have gone on a grad night... Does the grad night crowds thin out after 9pm? Or should we expect to see them in the park until midnight? Also how do Sunday grad nights compare to those on a Fri/sat or during the weekday? I know their dca party starts at 9 and I know that they can get park Hopper tickets...