Miyako Odori in Japan
Miyako Odori in Japan is held 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. This event in the first decade of the month april is annual.
World Piano Day on March 29 (a annual worldwide event founded by a group of likeminded people, takes place on the 88th day of the year – because of the number of keys on the instrument being celebrated);
Polar Jazz Festival in Svalbard, Norway on April 9 (since 1998. It is the world’s northernmost music festival);
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)