If you could explain the process, it would save lots of time pondering and plugging e, pi, and i into the calculator in random ways to figure out whats going on.
The philosophy and ideals behind the Grad Night movement are interlinked with providing an event that is safe, sober, and spectacularly fun. More than just a party, Grad Night is a commitment by parents, school and the community to conduct a great, once in a lifetime celebration.
Sober (from its original sense of freedom from intoxication, and hence temperate, staid, sedate) has come to indicate absence of levity, gaiety, or mirth, and thus to be akin to serious and grave: as sober as a judge; a sober expression on one's face.