Record Store Day is held on April 20. This event in the second decade of the month april is annual.
Similar events
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);
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);