Bicycle Day is a holiday that celebrates the discovery of the psychoactive effects of LSD (Lysergic Acid Diethylamide) by Swiss chemist Dr. Albert Hofmann.
On April 19, 1943, Hofmann ingested a small amount of LSD and then rode his bicycle home, experiencing intense and unusual sensations during the ride. He later described his experience as a "trip" that included visual and auditory hallucinations, changes in perception of time, and profound insights into the nature of reality. This event marked the first intentional LSD trip in history, and it is now celebrated annually as Bicycle Day.
Bicycle Day is often commemorated by individuals and groups who are interested in psychedelic culture and the history of LSD. Some celebrate by taking LSD themselves, while others organize events such as lectures, art shows, or psychedelic music festivals. The holiday is also an opportunity for reflection on the potential benefits and risks of psychedelic drugs, as well as their legal status and cultural significance.