Apple Music will launch at 11 AM ET tomorrow with the release of iOS 8.4. The first Beats 1 radio broadcast will begin one hour later, at 12 PM ET. Apple had previously said the new services would launch on June 30th, but Ian Rogers, senior director of Apple Music, announced the exact time in a blog post published over the weekend. Rogers later removed the specific time from his post, but not before MacRumors reported it. Rogers later tweeted that Zane Lowe's Beats 1 radio show would begin at 12 PM ET.
Lowe, who left BBC Radio 1 this year to join Apple, announced last week that his first interview would be with Eminem. Other programs slated for the station's first week will star Drake, Elton John, and Pharrell Williams, among other musicians.
WWDC 2015: The plan for Apple Music