The first Sunday of April every year in Japan is essentially National Penis Day. They celebrate with parades and large phalluses all around the city.
The purpose of the festival is to celebrate fertility.
No, this isn't an April Fools' joke - there is actually a penis festival going on in Japan today. Yep, you read that right - a festival dedicated to penises is currently taking place in Kawasaki right now. Several dead and around 30 injured as car ploughs into crowd in Germany Incredible.