Poster has red and black ink printed on white paper showing a man and woman with horns on their heads and with flames and flowers in the background. Around the edges of the flames is black text reading "the vernal equinox is your equinox you are the first day of spring! 5:24 a.m. March 20, 1968 with afternoon dancing and food at speedway meadow in Golden Gate Park and games and pleasures of imagination everywhere in the park". A horn on the woman's head has "free city" in black.