psychiatric tool; because of its intense and introspective nature, he could not imagine anyone using it recreationally. Bicycle Day is increasingly observed in psychedelic communities as a day to celebrate the discovery of LSD. The celebration of Bicycle Day originated in DeKalb, Illinois, in 1985, when Thomas B. Roberts, then a professor at Northern Illinois University, invented the name "Bicycle Day" when he founded the first celebration at his home. Several years later, he sent an announcement made by one of his students to friends and Internet lists, thus propagating the idea and the celebration. His original intent was to commemorate Hofmann's original, accidental exposure on April 16, but that date fell midweek and was not a good time for the party, so he chose the 19th to honor Hofmann's first intentional exposure. Psychiatric use LSD was introduced as a commercial medication under the trade-name Delysid for various psychiatric uses in 1947. LSD was brought to the attention of the United States in 1949 by Sandoz Laboratories because they believed LSD might have clinical applications. Throughout the 1950s, mainstream media reported on research into LSD and its growing use in psychiatry, and undergraduate psychology students taking LSD as part of their education described the effects of the drug. Time magazine published six positive reports on LSD between 1954 and 1959. LSD was originally perceived as a psychotomimetic capable of producing model psychosis. By the mid-1950s, LSD research was being conducted in major American medical centers, where researchers used LSD as a means of temporarily replicating the effects of mental illness. One of the leading authorities on LSD during the 1950s in the United States was the psychoanalyst Sidney Cohen. Cohen first took the drug on October 12, 1955, and expected to have an unpleasant trip, but was surprised when he experienced "no confused, disoriented delirium." He reported that the "problems and strivings, the worries and frustrations of everyday life vanished; in their place was a majestic, sunlit, heavenly inner quietude." Cohen immediately began his own experiments with LSD with the help of Aldous Huxley whom he had met in 1955. In 1957, with the help of psychologist Betty Eisner, Cohen began experimenting on whether or not LSD might have a helpful effect in facilitating psychotherapy, curing alcoholism, and enhancing creativity. Between 1957 and 1958, they treated 22 patients who had minor personality disorders. LSD was also given to artists in