The Jerry Garcia Estate has teamed up with EMEK Studios for a limited edition poster release celebrating today’s holiday celebrating the invention of LSD, Bicycle Day.

So the story goes that Albert Hoffman took a “wide-eyed bicycle ride” after accidentally creating the chemical compound he called a “problem child,” which of course hugely influenced the early days of the Grateful Dead and Jerry Garcia‘s musical upbringing.

Check it out below and head here to grab a copy.