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**World Rock Day, in Portuguese Dia Mundial do Rock, celebrates rock music. The date alludes to the Live Aid benefit concert, organized by Bob Geldof and Midge Ure, however, even though the holiday is called "World Rock Day", it is celebrated only in Brazil**

**Rock is a broad genre of popular music that originated as "rock and roll" in the United States in the late 1940s and early 1950s, developing into a range of different styles from the mid-1960s, particularly in the United States and the United Kingdom**