Bicycle Day is a holiday that commemorates the date that Dr. Albert Hofmann first tripped on LSD (Lysergic Acid Diethylamide-25) and bicycled home from his lab in Basel, Switzerland on April 19, 1943. Dr. Hoffman first synthesized LSD-25 in 1938 but did not become aware of its psychedelic properties until April 16th, 1943 when he absorbed a small amount of the compound accidentally either through his fingertips or by ingesting it. Curious about the psychoactive effects, three days later he performed a self-experiment to determine the true effects of LSD, intentionally ingesting 250 micrograms, an amount he predicted to be a threshold dose (an actual threshold dose is 20 micrograms) on April 19th, 1943. He started to feel the effects and asked his laboratory assistant to escort him home. During the bicycle ride home, he experienced the psychedelic effects of LSD, making this the date of the first acid trip in history, propelling the West into the Psychedelic Age.
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