“Where have yoooouuuu beeeeennnn”

There is a rumor going around that the Pixies are going to reunite for a tour and possibly an album. I’ve never seen the Pixies, but I’ve often thought of them as the band I’d most like to see reunited, so this is exciting news.
I have a practical question though. How can a band set an advance date for getting back together? “We’ve decided to put aside our differences and be friends again… beginning April 13 at 3:30pm. Until then, we hate each other.” (hypothetical quote)