This Date in Rock Music History: August 12

1956:  Elvis Presley received the key to the city of New Orleans, Louisiana.
1956:  The Platters performed on The Ed Sullivan Show.

This Date in Rock Music History: August 11

1957:  Jerry Lee Lewis performed on The Steve Allen Show on NBC-TV.  (Note:  some websites claim Lewis was on 'The Big Beat Show' on ABC-TV.  He performed on that show on August 2--on August 11, he was on 'The Steve Allen Show', according to 'Spin' magazine and 'TV.com'.  'The Big Beat Show" only lasted four episodes, with the last one being on August 2, the date that Lewis performed.)
1958:  "Patricia" by Perez Prado was #1 on the R&B chart.
1958:  In Billboard's second chart, Ricky Nelson remained at #1 ("Poor Little Fool") but Domenico Modugno rose from 54 to 2 with "Nel Blu Dipinto Di Blu (Volare)".
1962:  Kid Galahad starring Elvis Presley premiered in theaters.  (Note:  there are websites which report the film's release as July 25 (one quotes a 'Variety' magazine article about the movie premiere from July 25, 1962 which we cannot find.  The official Graceland website reports that the film opened nationally in theaters on August 28 (some websites say August 29).  Unfortunately, there are no sources which definitively decide the correct date for the premiere, but our best research indicates that the film premiered on August 11.)

This Date in Rock Music History: August 10

1954:  Elvis Presley sang his new song "That's Alright Mama" at Overton Park in Memphis, Tennessee.