On April 19 the international psychedelic community will celebrate the Bicycle Day, to commemorate chemist Albert Hofmann and his historic discovery, LSD.
The Swiss (al)chemist - after an accidental exposition to LSD in his laboratory three days before - decided to undergo a "bio essay" (self-sperimentation") on himself on April 19th, 1943. He took 250 micrograms of LSD in his laboratory (a presumably very low dose, but effectively a rather consistent one !) After half an hour, noticing the first alarming effects of the entheogen, Hofmann decided to go back home by bicycle. Since then the now legendary visionary Hofmann's bicycle ride marks the beginning of LSD history and his great influence in modern society.
The event will be celebrated all over the world, with small or great events (and even with solitary/small groups psychedelic celebration under the full moon....) If you're in San Francisco, you can join the 2nd Annual Bicycle Day Parade, that will begin at Hippie Hill in Golden Gate Park, San Francisco - April 19, 1pm.
Bycicle Day Parade 2015