Polar Jazz Festival in Svalbard, Norway
Polar Jazz Festival in Svalbard, Norway is held on April 9. Since 1998. It is the world’s northernmost music festival. This event in the first decade of the month april is annual.
Miyako Odori in Japan on April 1 (The Miyako Odori or 都をどり is one of Japan's best Geisha events. It features a large number of Maiko and several Geiko from the Gion district of Kyoto);
Barbershop Quartet Day on April 11 (On April 11, 1938 the Society for the Preservation and Encouragement of Barbershop Quartet Singing in America was founded in Tulsa, Oklahoma);
Eight Track Tape Day on April 11 (It's origin likely hails from the sixties and seventies);
National Choro Day in Brazil on April 23 (Dia Nacional do Choro);
Festival of the Legends of Wallenata in Colombia on April 30 (Festival de la Leyenda Vallenata);
Chicken Dance Day on May 14 (“Der Ententanz” was the name of the song that inspired all of this, and while the dance has come to be called “The Chicken Dance”, the song itself is called The Duck Dance)