St. Patrick's day.

Oscar Wilde, brilliant 19th century literature genius, controversial socialite, all-round scallywag and, Irish to the core. Like many other famous art figures of his time, he was apparently addicted to Absinthe, a bright green licorice tasting hallucinogen... which had the unfortunate 'end-game' of killing its adherents if they let it get out of control.

It was banned in many countries from early in the 20th. century, but is reportedly making a come-back amongst some Europeans as I write this.