Hi! California girl here! Yes, grad night is often at Disneyland (California Adventure park now)where they do close the park from 9pm to 2am just for graduates from multiple schools. Everyone is usually casual as it’s for having fun, but you can also choose to dress up for fun.
Umm, that is their grad night outfit? I thought grad night is supposed to be formal wear tho? Or it's just my country doing formal wear