Representatives from the press has been sent this somewhat cryptic message, asking them to save the date September 26, 2018. An invitation will follow. According to one such representative, Roger Friedman, this is an event where details of the upcoming 50th anniversary edition of The Beatles' self titled "white album" will be revealed. Friedman writes that the event will take place in New York.
We have also been told from another source that the track list for the various editions will be revealed on September 25th, so perhaps the event in question is a listening party and an opportunity to interview Giles Martin, who is Apple's go to guy when it comes to remixing sound.