To dream that you are at a prom, represents cycles and the passage of time. This dream signals an end to something and the beginning of something else. This dream may also signify your anticipation of your own upcoming prom in real life.
Proms in dreams represent celebrations, creation, new beginnings for romance, and going with what life has to offer you. If you dream that you are attending or going to a prom, it represents your attempts to achieve happiness. If you dream of having a bad time at the prom, you may lose a friend.