This Date in Rock Music History: May 5

1900:  The Billboard (known today as Billboard), in its sixth year, switched production to weekly rather than monthly.
1956:  The Elvis Presley album Elvis becomes the first rock LP to top the Album chart.

This Date in Rock Music History: May 4

1956:  Elvis Presley released the single "I Want You, I Need You, I Love You".  (Note:  several websites report the date of release as May 1 or May 12, and, while there are no "established" reliable sources, the website www.elvis-history-blog.com contains a pretty thorough account of the song's recording and release.  They report that Elvis released the song on May 4, and that is the best information on the release date.)
1956:  Gene Vincent recorded "Be-Bop-A-Lula" at Owen Bradley's Studio in Nashville, Tennessee.
1957:  The first rock music show on television, Alan Freed's Rock 'n' Roll Revue, premiered on ABC-TV.  Guests were the Del-Vikings, the Clovers, Guy Mitchell and Screamin' Jay Hawkins.  (Note:  some websites claim that a group called the Dell-Vikings were on the show.  There is no such group.  The proper spelling of the group is Del-Vikings.)
1959:  The first Grammy Awards Show was presented at the Beverly Hills Hotels in Los Angeles and New York City.  Volare" by Domenico Modugno received Record of the Year.

This Date in Rock Music History: May 3

1964:  Gerry & the Pacemakers performed "Don't Let The Sun Catch You Crying" for their television debut in the United States on The Ed Sullivan Show.
1965:  The Beatles filmed sequences for their upcoming movie Help!  on the Salisbury Plain in Wiltshire, England with the British Army’s Third Tank Division.