Bicycle Day – in fact, this holiday is not about bicycles. Bicycle Day, observed annually on April 19, commemorates a pivotal moment in psychedelic history: the first intentional LSD trip by Swiss chemist Albert Hofmann in 1943. This day is distinct from World Bicycle Day, which celebrates cycling on June 3.
The Origin of Bicycle Day
On April 19, 1943, Hofmann ingested 250 micrograms of lysergic acid diethylamide (LSD) to explore its effects. As the substance took hold, he experienced intense perceptual changes and, due to wartime restrictions on automobile use, embarked on a bicycle ride home through the streets of Basel, Switzerland. This journey became the first documented LSD trip, marking a significant event in the study of psychedelics. 1
Celebrating Bicycle Day
Bicycle Day is honored by various communities through activities that reflect the spirit of exploration and consciousness expansion. Common observances include:
- Psychedelic Art and Music
Hosting exhibitions or listening sessions featuring psychedelic-inspired creations. - Educational Events
Organizing lectures or discussions on the history and science of psychedelics. - Cycling Gatherings
Participating in group bicycle rides to pay homage to Hofmann’s journey.
These celebrations aim to foster awareness and appreciation for the cultural and scientific significance of psychedelics.
Bicycle Day Dates Table
| Year | Date | Day |
|---|---|---|
| 2025 | April 19 | Saturday |
| 2026 | April 19 | Sunday |
| 2027 | April 19 | Monday |
| 2028 | April 19 | Wednesday |
| 2029 | April 19 | Thursday |
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