Timeline of Psychedelic Events

October 27, 1970

CSA Places Hallucinogens on Schedule I

The Comprehensive Drug Abuse Prevention and Control Act is passed by the US Congress and psilocybin, LSD, and other hallucinogens are placed on Schedule I.

April 1962

Good Friday Experiment Begins

The Good Friday Experiment finds that psilocybin can catalyze spiritual experiences in religious people.


CIA Begins Project MKUltra

The CIA starts Project MKUltra using human subjects to develop drugs and administration procedures to be used in interrogations.

April 19, 1943

The First Bicycle Day

Albert Hofmann self-tests LSD and rides his bicycle home, describing the trip as a "horror show."