March 15 was Penis Day in Japan .  Here are the photos. The actual festival is called Honen Matsuri. Celebrated every March 15 in Komaki, a town about 45 minutes north of Nagoya , Japan , this is the time of year where folks haul out a large wooden penis to give three cheers to fertility and renewal. The custom is an old one that is connected to bringing about a good harvest and having babies.