Harry Potter and the Order of the Pheonix, Chapter 35-Beyond the Veil, pg. 784 and 785
A jet of red light had shot from the end of Bellatrix Lestrange's wand, but Malfoy had deflected it. His spell caused hers to hit the shelf a foot to the left of Harry and several of the glass orbs there shattered.
Two figures, pearly white as ghosts, fluid as smoke, unfurled themselves from the fragments of broken glass upon the floor and each began to speak. Their voices vied with each other, so that only fragments of what they were saying could be heard over Malfoy and Bellatrix's shouts.
"...at the Solstice will come a new..." said the figure of an old bearded man.
Ms. Rowling could have been telling us that the next book will come out at Summer solstice or Winter solstice. Or the new movie, or something like that... just reaching, though.
