Barbershop Music Appreciation Day
Barbershop Music Appreciation Day is held on July 13. This event in the second decade of the month July is annual. 
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Distinctively, barbershop music is written with its greatest emphasis on chord structure. Strongly “barbershop” arrangements showcase full four-part chords for every note, with a minimum of doubling on octaves.
Edna Mae Anderson of Tulsa, Oklahoma invited some women to her home to sing on July 13, 1945. Their husbands were members of the Society for the Preservation and Encouragement of Barber Shop Quartet Singing in America. The ladies wanted to participate in the singing fun and enjoyment. On that evening, the "Sweet Adelines" were born. The group later became Sweet Adelines International., which now boasts hundreds of groups and thousands for members. Barbershop Music Appreciation Day was created in 2005 by Sweet Adelines International. It was started to mark the 60th anniversary of the founding of their organization.
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World Rock Day on July 13
International Conductor's Day on July 13
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Peruvian Cajon Day on August 2
Øya Festival in Oslo, Norway on August 8 (Øyafestivalen is a four-day music fest that brings together about 60,000 people on the green grass of Tøyen Park, who are excited to listen to tunes from internationally acclaimed stars)