Disneyland Grad Nite:

On June 15, 1961, Walt Disney threw the original Grad Nite party at Disneyland Park for 8,500 high school seniors from Los Angeles and Orange counties. Fifty years later, Grad Nite has grown into a Southern California tradition, continuing over seven nights this May and June. Although the formal dress code of the early years-suits and ties for gentlemen, dresses and skirts for ladies- has given way to more casual attire, Disneyland Grad Nite remains the ultimate all-night graduation party, with more than 5 million enthusiastic high school seniors celebrating their accomplishments over the past half century in Walt Disney's original Magic Kingdom.

I was at Grad Night 1970, Riverside Poly High School, Riverside, California...DR LEE