Prom is set for May 9. Grandview High School's Junior/Senior Prom is coming up soon. The annual event will take place on Saturday, May 9. The theme of this year's prom is Mud on a Glass Shoe, which will have a rustic fairytale feel. Tickets for the dance are $20 for a single and $40 for couples. And anyone who wants to bring someone from a different school, must fill out a guest pass and submit it to the office.