Bicycle Day (psychedelic holiday)
| Bicycle Day | |
|---|---|
Denver Bicycle Day Parade in 2019. A psychedelic enthusiast wears a lab coat honoring Dr. Hofmann. | |
| Type | Secular & Spiritual |
| Celebrations | Consumption of lysergic acid diethylamide (LSD) or other psychedelics, riding a bike, organizing a bicycle parade, microdosing, psychedelic-themed festivities |
| Observances | Honors the anniversary of the first ever intentional acid trip, undergone by Swiss chemist Albert Hofmann on April 19, 1943, in Basel, Switzerland, and the impact of the psychedelic revolution for science, medicine and human evolution |
| Date | April 19 |
| Next time | 19 April 2026 |
| Frequency | Annual |
Bicycle Day is an unofficial celebration on April 19th of the psychedelic revolution and the first psychedelic trip on LSD by Dr. Albert Hofmann in 1943, in tandem with his bicycle ride home from Sandoz Labs. It is commonly celebrated by ingesting psychedelics and riding a bike, sometimes in a parade, and often with psychedelic-themed festivities. The holiday was first named and declared in 1985 by Thomas Roberts, a psychology professor at Northern Illinois University, but has likely been celebrated by psychedelic enthusiasts since the beginning of the psychedelic era, and celebrated in popular culture since at least 2004.