This Date in Rock Music History: May 2

1956:  For the first time in chart history, five songs were in both the popular and the R&B Top 10.  They were Elvis Presley's "Heartbreak Hotel", "Blue Suede Shoes" by Carl Perkins, "Long Tall Sally" from Little Richard, "Magic Touch" by the Platters and "Why Do Fools Fall in Love" by Frankie Lymon and the Teenagers.
1960 - Production began on Elvis Presley's G.I. Blues.  It was his first post-Army movie. 

This Date in Rock Music History: May 1

1955:  Elvis Presley played three concerts at the Municipal Auditorium in New Orleans, Louisiana.
1955:  Leonard Chess signed Chuck Berry to a recording contract.

This Date in Rock Music History: April 30

1957:  Elvis Presley recorded the classic "Jailhouse Rock".  (Note:  Some websites report that Presley recorded the song "Jailhouse Rock" on April 30 and May 3, and some say that he recorded it in three sessions--2 on April 30 and May 3 at Radio Recorders and 1 at MGM Studios in Hollywood, California.  Presley did record songs for the movie 'Jailhouse Rock' on those other two days, but according to the book 'Elvis Presley:  A Life In Music' by Ernst Jorgensen, Presley completed recording of the song "Jailhouse Rock" on April 30 at Radio Recorders.)

1960:  Fats Domino recorded "Walking To New Orleans".